chore: fix gitattributes

.clang-format

@@ -0,0 +1,56 @@
+Language: Cpp
+BasedOnStyle: LLVM
+
+AccessModifierOffset: -8
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: Consecutive
+AlignConsecutiveDeclarations: Consecutive
+AlignConsecutiveMacros: Consecutive
+AlignEscapedNewlines: Left
+AlignOperands: DontAlign
+AlignTrailingComments: Always
+AllowShortBlocksOnASingleLine: Never
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortLambdasOnASingleLine: None
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: false
+  AfterControlStatement: false
+  AfterEnum: false
+  AfterFunction: true
+  AfterNamespace: false
+  AfterObjCDeclaration: false
+  AfterStruct: false
+  AfterUnion: false
+  AfterExternBlock: false
+  BeforeCatch: false
+  BeforeElse: false
+  BeforeLambdaBody: false
+  BeforeWhile: false
+  IndentBraces: false
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeBraces: Custom
+BreakInheritanceList: AfterColon
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeComma
+BreakStringLiterals: false
+ColumnLimit: 80
+Cpp11BracedListStyle: true
+EmptyLineBeforeAccessModifier: Always
+IndentAccessModifiers: false
+IndentCaseBlocks: false
+IndentCaseLabels: false
+IndentGotoLabels: false
+IndentPPDirectives: None
+IndentWidth: 8
+InsertNewlineAtEOF: true
+InsertTrailingCommas: None
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+PackConstructorInitializers: NextLineOnly
+PointerAlignment: Left
+SortIncludes: Never
+SpaceBeforeCaseColon: false
+TabWidth: 8
+UseTab: Always

.clang-tidy

@@ -0,0 +1,64 @@
+---
+# C++ Core Guidelines style (CppCoreGuidelines)
+Checks: >
+  cppcoreguidelines-*,
+  readability-identifier-naming,
+  readability-*,
+  modernize-*,
+  performance-*,
+  bugprone-*,
+  -modernize-use-trailing-return-type,
+  -readability-magic-numbers,
+  -cppcoreguidelines-avoid-magic-numbers,
+  -cppcoreguidelines-pro-bounds-pointer-arithmetic,
+  -cppcoreguidelines-pro-type-reinterpret-cast
+
+CheckOptions:
+  # C++ Core Guidelines: Types use PascalCase
+  - { key: readability-identifier-naming.ClassCase,              value: CamelCase  }
+  - { key: readability-identifier-naming.StructCase,             value: CamelCase  }
+  - { key: readability-identifier-naming.EnumCase,               value: CamelCase  }
+  - { key: readability-identifier-naming.UnionCase,              value: CamelCase  }
+
+  # C++ Core Guidelines: Functions use snake_case (STL style)
+  - { key: readability-identifier-naming.FunctionCase,           value: lower_case }
+  - { key: readability-identifier-naming.MethodCase,             value: lower_case }
+
+  # Member variables: snake_case with trailing underscore
+  - { key: readability-identifier-naming.PrivateMemberCase,      value: lower_case }
+  - { key: readability-identifier-naming.PrivateMemberSuffix,    value: '_'        }
+  - { key: readability-identifier-naming.ProtectedMemberCase,    value: lower_case }
+  - { key: readability-identifier-naming.ProtectedMemberSuffix,  value: '_'        }
+  - { key: readability-identifier-naming.PublicMemberCase,       value: lower_case }
+
+  # Parameters and local variables: snake_case
+  - { key: readability-identifier-naming.ParameterCase,          value: lower_case }
+  - { key: readability-identifier-naming.VariableCase,           value: lower_case }
+  - { key: readability-identifier-naming.LocalVariableCase,      value: lower_case }
+
+  # Constants and macros: UPPER_CASE
+  - { key: readability-identifier-naming.ConstantCase,           value: UPPER_CASE }
+  - { key: readability-identifier-naming.ConstexprVariableCase,  value: UPPER_CASE }
+  - { key: readability-identifier-naming.MacroDefinitionCase,    value: UPPER_CASE }
+  - { key: readability-identifier-naming.EnumConstantCase,       value: UPPER_CASE }
+
+  # Global variables: snake_case (Core Guidelines: avoid globals when possible)
+  - { key: readability-identifier-naming.GlobalVariableCase,     value: lower_case }
+
+  # Namespaces: snake_case
+  - { key: readability-identifier-naming.NamespaceCase,          value: lower_case }
+
+  # Template parameters: PascalCase (following STL conventions)
+  - { key: readability-identifier-naming.TypeTemplateParameterCase, value: CamelCase }
+  - { key: readability-identifier-naming.ValueTemplateParameterCase, value: lower_case }
+
+  # Type aliases: PascalCase (modern C++ style with 'using')
+  - { key: readability-identifier-naming.TypeAliasCase,          value: CamelCase  }
+
+  # Function size limits
+  - { key: readability-function-size.LineThreshold,              value: 100        }
+  - { key: readability-function-size.StatementThreshold,         value: 50         }
+
+WarningsAsErrors: ''
+HeaderFilterRegex: 'src/.*\.h$'
+FormatStyle: file

.gitattributes

@@ -43,7 +43,7 @@
 *.udk lock
 *.upk lock
 # Anything in `/RawContent` dir
-/RowContent/**/* lfs
+/RawContent/**/* lfs
 # Common files
 *.3ds lock
 *.3DS lock
@@ -167,6 +167,8 @@
 *.TAR lfs
 *.tar.gz lfs
 *.TAR.GZ lfs
+*.tga lfs
+*.TGA lfs
 *.tif lfs
 *.TIF lfs
 *.tiff lfs
@@ -210,175 +212,3 @@
 *.DYLIB lfs
 *.pdb lfs
 *.PDB lfs
-*.locres filter=lfs diff=lfs merge=lfs -text
-*.locmeta filter=lfs diff=lfs merge=lfs -text
-*.ico filter=lfs diff=lfs merge=lfs -text
-*.uasset filter=lfs diff=lfs merge=lfs -text
-*.umap filter=lfs diff=lfs merge=lfs -text
-*.udk filter=lfs diff=lfs merge=lfs -text
-*.upk filter=lfs diff=lfs merge=lfs -text
-*.3DS filter=lfs diff=lfs merge=lfs -text
-*.ABC filter=lfs diff=lfs merge=lfs -text
-*.AEP filter=lfs diff=lfs merge=lfs -text
-*.AFDESIGN filter=lfs diff=lfs merge=lfs -text
-*.AFPHOTO filter=lfs diff=lfs merge=lfs -text
-*.AI filter=lfs diff=lfs merge=lfs -text
-*.AIF filter=lfs diff=lfs merge=lfs -text
-*.AVI filter=lfs diff=lfs merge=lfs -text
-*.BANK filter=lfs diff=lfs merge=lfs -text
-*.BGEO filter=lfs diff=lfs merge=lfs -text
-*.BIN filter=lfs diff=lfs merge=lfs -text
-*.BLEND filter=lfs diff=lfs merge=lfs -text
-*.BMP filter=lfs diff=lfs merge=lfs -text
-*.BPOLY filter=lfs diff=lfs merge=lfs -text
-*.C4D filter=lfs diff=lfs merge=lfs -text
-*.DOC filter=lfs diff=lfs merge=lfs -text
-*.DOCX filter=lfs diff=lfs merge=lfs -text
-*.DWG filter=lfs diff=lfs merge=lfs -text
-*.DXF filter=lfs diff=lfs merge=lfs -text
-*.EXR filter=lfs diff=lfs merge=lfs -text
-*.FBX filter=lfs diff=lfs merge=lfs -text
-*.GEO filter=lfs diff=lfs merge=lfs -text
-*.GI filter=lfs diff=lfs merge=lfs -text
-*.GI2 filter=lfs diff=lfs merge=lfs -text
-*.GIF filter=lfs diff=lfs merge=lfs -text
-*.GLB filter=lfs diff=lfs merge=lfs -text
-*.GLTF filter=lfs diff=lfs merge=lfs -text
-*.HDR filter=lfs diff=lfs merge=lfs -text
-*.HIP filter=lfs diff=lfs merge=lfs -text
-*.HIPLC filter=lfs diff=lfs merge=lfs -text
-*.HIPNC filter=lfs diff=lfs merge=lfs -text
-*.JPEG filter=lfs diff=lfs merge=lfs -text
-*.JPG filter=lfs diff=lfs merge=lfs -text
-*.MA filter=lfs diff=lfs merge=lfs -text
-*.MAX filter=lfs diff=lfs merge=lfs -text
-*.MB filter=lfs diff=lfs merge=lfs -text
-*.MOV filter=lfs diff=lfs merge=lfs -text
-*.MP3 filter=lfs diff=lfs merge=lfs -text
-*.MP4 filter=lfs diff=lfs merge=lfs -text
-*.MPEG filter=lfs diff=lfs merge=lfs -text
-*.MPG filter=lfs diff=lfs merge=lfs -text
-*.OBJ filter=lfs diff=lfs merge=lfs -text
-*.PDF filter=lfs diff=lfs merge=lfs -text
-*.PFM filter=lfs diff=lfs merge=lfs -text
-*.PIC filter=lfs diff=lfs merge=lfs -text
-*.PMB filter=lfs diff=lfs merge=lfs -text
-*.PNG filter=lfs diff=lfs merge=lfs -text
-*.POLY filter=lfs diff=lfs merge=lfs -text
-*.PPT filter=lfs diff=lfs merge=lfs -text
-*.PPTX filter=lfs diff=lfs merge=lfs -text
-*.PROFRAW filter=lfs diff=lfs merge=lfs -text
-*.PRPROJ filter=lfs diff=lfs merge=lfs -text
-*.PSB filter=lfs diff=lfs merge=lfs -text
-*.PSD filter=lfs diff=lfs merge=lfs -text
-*.RAR filter=lfs diff=lfs merge=lfs -text
-*.RAT filter=lfs diff=lfs merge=lfs -text
-*.RIB filter=lfs diff=lfs merge=lfs -text
-*.SKETCH filter=lfs diff=lfs merge=lfs -text
-*.STL filter=lfs diff=lfs merge=lfs -text
-*.TAR filter=lfs diff=lfs merge=lfs -text
-*.TAR.GZ filter=lfs diff=lfs merge=lfs -text
-*.TIF filter=lfs diff=lfs merge=lfs -text
-*.TIFF filter=lfs diff=lfs merge=lfs -text
-*.TMP filter=lfs diff=lfs merge=lfs -text
-*.UEXP filter=lfs diff=lfs merge=lfs -text
-*.USD filter=lfs diff=lfs merge=lfs -text
-*.USDC filter=lfs diff=lfs merge=lfs -text
-*.USDZ filter=lfs diff=lfs merge=lfs -text
-*.VDB filter=lfs diff=lfs merge=lfs -text
-*.VOX filter=lfs diff=lfs merge=lfs -text
-*.WAV filter=lfs diff=lfs merge=lfs -text
-*.XCF filter=lfs diff=lfs merge=lfs -text
-*.XLS filter=lfs diff=lfs merge=lfs -text
-*.XLSX filter=lfs diff=lfs merge=lfs -text
-*.ZIP filter=lfs diff=lfs merge=lfs -text
-*.3ds filter=lfs diff=lfs merge=lfs -text
-*.abc filter=lfs diff=lfs merge=lfs -text
-*.aep filter=lfs diff=lfs merge=lfs -text
-*.afdesign filter=lfs diff=lfs merge=lfs -text
-*.afphoto filter=lfs diff=lfs merge=lfs -text
-*.ai filter=lfs diff=lfs merge=lfs -text
-*.aif filter=lfs diff=lfs merge=lfs -text
-*.avi filter=lfs diff=lfs merge=lfs -text
-*.bank filter=lfs diff=lfs merge=lfs -text
-*.bgeo filter=lfs diff=lfs merge=lfs -text
-*.bin filter=lfs diff=lfs merge=lfs -text
-*.blend filter=lfs diff=lfs merge=lfs -text
-*.bmp filter=lfs diff=lfs merge=lfs -text
-*.bpoly filter=lfs diff=lfs merge=lfs -text
-*.c4d filter=lfs diff=lfs merge=lfs -text
-*.doc filter=lfs diff=lfs merge=lfs -text
-*.docx filter=lfs diff=lfs merge=lfs -text
-*.dwg filter=lfs diff=lfs merge=lfs -text
-*.dxf filter=lfs diff=lfs merge=lfs -text
-*.exr filter=lfs diff=lfs merge=lfs -text
-*.fbx filter=lfs diff=lfs merge=lfs -text
-*.geo filter=lfs diff=lfs merge=lfs -text
-*.gi filter=lfs diff=lfs merge=lfs -text
-*.gi2 filter=lfs diff=lfs merge=lfs -text
-*.gif filter=lfs diff=lfs merge=lfs -text
-*.glb filter=lfs diff=lfs merge=lfs -text
-*.gltf filter=lfs diff=lfs merge=lfs -text
-*.hdr filter=lfs diff=lfs merge=lfs -text
-*.hip filter=lfs diff=lfs merge=lfs -text
-*.hiplc filter=lfs diff=lfs merge=lfs -text
-*.hipnc filter=lfs diff=lfs merge=lfs -text
-*.jpeg filter=lfs diff=lfs merge=lfs -text
-*.jpg filter=lfs diff=lfs merge=lfs -text
-*.ma filter=lfs diff=lfs merge=lfs -text
-*.max filter=lfs diff=lfs merge=lfs -text
-*.mb filter=lfs diff=lfs merge=lfs -text
-*.mov filter=lfs diff=lfs merge=lfs -text
-*.mp3 filter=lfs diff=lfs merge=lfs -text
-*.mp4 filter=lfs diff=lfs merge=lfs -text
-*.mpeg filter=lfs diff=lfs merge=lfs -text
-*.mpg filter=lfs diff=lfs merge=lfs -text
-*.obj filter=lfs diff=lfs merge=lfs -text
-*.pdf filter=lfs diff=lfs merge=lfs -text
-*.pfm filter=lfs diff=lfs merge=lfs -text
-*.pic filter=lfs diff=lfs merge=lfs -text
-*.pmb filter=lfs diff=lfs merge=lfs -text
-*.png filter=lfs diff=lfs merge=lfs -text
-*.poly filter=lfs diff=lfs merge=lfs -text
-*.ppt filter=lfs diff=lfs merge=lfs -text
-*.pptx filter=lfs diff=lfs merge=lfs -text
-*.profraw filter=lfs diff=lfs merge=lfs -text
-*.prproj filter=lfs diff=lfs merge=lfs -text
-*.psb filter=lfs diff=lfs merge=lfs -text
-*.psd filter=lfs diff=lfs merge=lfs -text
-*.rar filter=lfs diff=lfs merge=lfs -text
-*.rat filter=lfs diff=lfs merge=lfs -text
-*.rib filter=lfs diff=lfs merge=lfs -text
-*.sketch filter=lfs diff=lfs merge=lfs -text
-*.stl filter=lfs diff=lfs merge=lfs -text
-*.tar filter=lfs diff=lfs merge=lfs -text
-*.tar.gz filter=lfs diff=lfs merge=lfs -text
-*.tif filter=lfs diff=lfs merge=lfs -text
-*.tiff filter=lfs diff=lfs merge=lfs -text
-*.tmp filter=lfs diff=lfs merge=lfs -text
-*.uexp filter=lfs diff=lfs merge=lfs -text
-*.usd filter=lfs diff=lfs merge=lfs -text
-*.usdc filter=lfs diff=lfs merge=lfs -text
-*.usdz filter=lfs diff=lfs merge=lfs -text
-*.vdb filter=lfs diff=lfs merge=lfs -text
-*.vox filter=lfs diff=lfs merge=lfs -text
-*.wav filter=lfs diff=lfs merge=lfs -text
-*.xcf filter=lfs diff=lfs merge=lfs -text
-*.xls filter=lfs diff=lfs merge=lfs -text
-*.xlsx filter=lfs diff=lfs merge=lfs -text
-*.zip filter=lfs diff=lfs merge=lfs -text
-*.a filter=lfs diff=lfs merge=lfs -text
-*.A filter=lfs diff=lfs merge=lfs -text
-*.lib filter=lfs diff=lfs merge=lfs -text
-*.LIB filter=lfs diff=lfs merge=lfs -text
-*.exe filter=lfs diff=lfs merge=lfs -text
-*.EXE filter=lfs diff=lfs merge=lfs -text
-*.dll filter=lfs diff=lfs merge=lfs -text
-*.DLL filter=lfs diff=lfs merge=lfs -text
-*.so filter=lfs diff=lfs merge=lfs -text
-*.SO filter=lfs diff=lfs merge=lfs -text
-*.dylib filter=lfs diff=lfs merge=lfs -text
-*.DYLIB filter=lfs diff=lfs merge=lfs -text
-*.pdb filter=lfs diff=lfs merge=lfs -text
-*.PDB filter=lfs diff=lfs merge=lfs -text
-*.tga filter=lfs diff=lfs merge=lfs -text

.gitignore

@@ -90,5 +90,9 @@ Mkfile.old
 dkms.conf
 
 # Build directory
-Build/
+build/
-**/Build/
+**/build/
+
+# Asset directory
+!data/
+!data/**

README.md

@@ -1,3 +1,3 @@
-# U-Tad: 3D Programming
+# U-Tad - 3D Programming
 
 "3D Programming" subject assignments from the U-Tad's Master Degree in Video Game Programming.

data/fragment.glsl

@@ -1,5 +0,0 @@
-varying vec3 fcolor;
-
-void main() {
-	gl_FragColor = vec4(fcolor, 1);
-}

data/models/box_stack.mtl

@@ -0,0 +1,35 @@
+# Blender MTL File: 'box_stack.blend'
+# Material Count: 3
+
+newmtl mat_bot
+Ns 96.078431
+Ka 0.000000 1.000000 1.000000
+Kd 0.640000 0.640000 0.640000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2
+map_Ka top.png
+
+newmtl mat_mid
+Ns 96.078431
+Ka 0.600000 0.600000 0.000000
+Kd 0.640000 0.640000 0.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2
+map_Ka front.png
+
+newmtl mat_top
+Ns 96.078431
+Ka 1.000000 0.000000 1.000000
+Kd 0.640000 0.640000 0.640000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2
+map_Ka top.png

data/models/gunslinger.mtl

@@ -0,0 +1,32 @@
+# 3ds Max Wavefront OBJ Exporter v0.97b - (c)2007 guruware
+# File Created: 21.07.2015 23:00:44
+
+newmtl revolver
+	Ns 30.0000
+	Ni 1.5000
+	d 1.0000
+	Tr 0.0000
+	Tf 1.0000 1.0000 1.0000 
+	illum 2
+	Ka 0.5500 0.5500 0.5500
+	Kd 0.5500 0.5500 0.5500
+	Ks 0.0000 0.0000 0.0000
+	Ke 0.0000 0.0000 0.0000
+	map_Ka revolver_dfs.tga
+	map_Kd revolver_dfs.tga
+	map_bump revolver_nrm.tga
+	bump revolver_nrm.tga
+
+newmtl gunslinger
+	Ns 30.0000
+	Ni 1.5000
+	d 1.0000
+	Tr 0.0000
+	Tf 1.0000 1.0000 1.0000 
+	illum 2
+	Ka 0.5500 0.5500 0.5500
+	Kd 0.5500 0.5500 0.5500
+	Ks 0.0000 0.0000 0.0000
+	Ke 0.0000 0.0000 0.0000
+	map_Ka gunslinger_dfs.tga
+	map_Kd gunslinger_dfs.tga

data/shaders/fragment.glsl

@@ -0,0 +1,12 @@
+uniform int useTexture;
+uniform sampler2D texSampler;
+varying vec3 fcolor;
+varying vec2 ftexcoord;
+
+void main() {
+	if (useTexture == 1) {
+		gl_FragColor = texture2D(texSampler, ftexcoord);
+	} else {
+		gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
+	}
+}

data/shaders/vertex.glsl

@@ -1,9 +1,12 @@
 uniform mat4 mvp;
 attribute vec3 vpos;
 attribute vec3 vcolor;
+attribute vec2 vtexcoord;
 varying vec3 fcolor;
+varying vec2 ftexcoord;
 
 void main() {
 	gl_Position = mvp * vec4(vpos, 1);
 	fcolor = vcolor;
+	ftexcoord = vtexcoord;
 }

project/ugine3d.vcxproj.filters

@@ -1,71 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup>
-    <Filter Include="Source Files">
-      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
-      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
-    </Filter>
-    <Filter Include="Header Files">
-      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
-      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
-    </Filter>
-    <Filter Include="Resource Files">
-      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
-      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
-    </Filter>
-    <Filter Include="glfw">
-      <UniqueIdentifier>{422e20da-2cf0-4bda-9833-a89b7ab453a1}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="glew">
-      <UniqueIdentifier>{296e1ba9-28bc-4e0b-8d4e-413551edca96}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="Shaders">
-      <UniqueIdentifier>{0628083b-a31c-4825-822c-11b6f933e7bd}</UniqueIdentifier>
-    </Filter>
-  </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="..\lib\glfw\glfw3.h">
-      <Filter>glfw</Filter>
-    </ClInclude>
-    <ClInclude Include="..\lib\glfw\glfw3native.h">
-      <Filter>glfw</Filter>
-    </ClInclude>
-    <ClInclude Include="..\lib\glew\GL\glew.h">
-      <Filter>glew</Filter>
-    </ClInclude>
-    <ClInclude Include="..\src\vertex.h">
-      <Filter>Source Files</Filter>
-    </ClInclude>
-    <ClInclude Include="..\src\shader.h">
-      <Filter>Source Files</Filter>
-    </ClInclude>
-    <ClInclude Include="..\src\buffer.h">
-      <Filter>Source Files</Filter>
-    </ClInclude>
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="..\src\main.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-    <ClCompile Include="..\lib\glew\glew.c">
-      <Filter>glew</Filter>
-    </ClCompile>
-    <ClCompile Include="..\src\vertex.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-    <ClCompile Include="..\src\shader.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-    <ClCompile Include="..\src\buffer.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="..\data\fragment.glsl">
-      <Filter>Shaders</Filter>
-    </None>
-    <None Include="..\data\vertex.glsl">
-      <Filter>Shaders</Filter>
-    </None>
-  </ItemGroup>
-</Project>

src/buffer.cpp

@@ -1,14 +1,15 @@
 #include "buffer.h"
 
 #include <vector>
-#include <iostream>
 
 #include "../lib/glew/GL/glew.h"
 #include "../lib/glfw/glfw3.h"
 
+#include "logger.h"
 #include "vertex.h"
 
-Buffer::Buffer(const std::vector<Vertex>& vertices, const std::vector<uint16_t>& indices)
+Buffer::Buffer(const std::vector<Vertex>&   vertices,
+	       const std::vector<uint16_t>& indices)
 {
 	index_count_ = static_cast<GLsizei>(indices.size());
 
@@ -19,13 +20,18 @@ Buffer::Buffer(const std::vector<Vertex>& vertices, const std::vector<uint16_t>&
 	glBindVertexArray(vao_);
 
 	glBindBuffer(GL_ARRAY_BUFFER, vbo_);
-	glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex), vertices.data(), GL_STATIC_DRAW);
+	glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex),
+		     vertices.data(), GL_STATIC_DRAW);
 
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo_);
-	glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(uint16_t), indices.data(), GL_STATIC_DRAW);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(uint16_t),
+		     indices.data(), GL_STATIC_DRAW);
 
-	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), nullptr);
+	// Note: Vertex attributes are set up by Shader::setup_attribs() during rendering
-	glEnableVertexAttribArray(0);
+	// This allows the shader to dynamically query and set the correct attribute locations
+
+	Logger::info(sstr("Buffer created with ", vertices.size(),
+			  " vertices and ", indices.size(), " indices"));
 }
 
 Buffer::~Buffer()
@@ -33,13 +39,14 @@ Buffer::~Buffer()
 	glDeleteVertexArrays(1, &vao_);
 	glDeleteBuffers(1, &vbo_);
 	glDeleteBuffers(1, &ebo_);
+	Logger::info("Buffer destroyed");
 }
 
-void Buffer::Draw(const Shader& shader) const
+void Buffer::draw(const Shader& shader) const
 {
 	glBindVertexArray(vao_);
 	glBindBuffer(GL_ARRAY_BUFFER, vbo_);
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo_);
-	shader.SetupAttribs();
+	shader.setup_attribs();
 	glDrawElements(GL_TRIANGLES, index_count_, GL_UNSIGNED_SHORT, nullptr);
 }

src/buffer.h

@@ -10,10 +10,11 @@
 
 class Buffer {
 public:
-	Buffer(const std::vector<Vertex>& vertices, const std::vector<uint16_t>& indices);
+	Buffer(const std::vector<Vertex>&   vertices,
+	       const std::vector<uint16_t>& indices);
 	~Buffer();
 
-	void Draw(const Shader& shader) const;
+	void draw(const Shader& shader) const;
 
 private:
 	uint32_t vao_, vbo_, ebo_;

src/camera.cpp

@@ -0,0 +1,41 @@
+#include "camera.h"
+#include "state.h"
+#include "../lib/glew/GL/glew.h"
+#include "../lib/glm/gtc/matrix_transform.hpp"
+
+Camera::Camera()
+    : projection_(glm::mat4(1.0f))
+    , viewport_(0, 0, 800, 600)
+    , clear_color_(0.0f, 0.0f, 0.0f)
+{
+}
+
+void Camera::prepare()
+{
+	// Set projection matrix
+	state::projection_matrix = projection_;
+
+	// Calculate view matrix
+	// For a camera, we need the inverse transformation:
+	// View = inverse(Translation * Rotation)
+	// Which is: Rotation^-1 * Translation^-1
+	glm::mat4 view = glm::mat4(1.0f);
+
+	// Inverse rotation (rotate in opposite direction)
+	view = glm::rotate(view, -rotation_.z, glm::vec3(0.0f, 0.0f, 1.0f));
+	view = glm::rotate(view, -rotation_.y, glm::vec3(0.0f, 1.0f, 0.0f));
+	view = glm::rotate(view, -rotation_.x, glm::vec3(1.0f, 0.0f, 0.0f));
+
+	// Inverse translation (translate in opposite direction)
+	view = glm::translate(view, -position_);
+
+	state::view_matrix = view;
+
+	// Set viewport
+	glViewport(viewport_.x, viewport_.y, viewport_.z, viewport_.w);
+	glScissor(viewport_.x, viewport_.y, viewport_.z, viewport_.w);
+
+	// Set clear color and clear buffers
+	glClearColor(clear_color_.r, clear_color_.g, clear_color_.b, 1.0f);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}

src/camera.h

@@ -0,0 +1,46 @@
+#ifndef CAMERA_H_
+#define CAMERA_H_
+
+#include "entity.h"
+#include "../lib/glm/glm.hpp"
+
+class Camera : public Entity {
+public:
+	Camera();
+
+	[[nodiscard]] const glm::mat4& projection() const
+	{
+		return projection_;
+	}
+	void set_projection(const glm::mat4& proj)
+	{
+		projection_ = proj;
+	}
+
+	[[nodiscard]] const glm::ivec4& viewport() const
+	{
+		return viewport_;
+	}
+	void set_viewport(const glm::ivec4& vp)
+	{
+		viewport_ = vp;
+	}
+
+	[[nodiscard]] const glm::vec3& clear_color() const
+	{
+		return clear_color_;
+	}
+	void set_clear_color(const glm::vec3& color)
+	{
+		clear_color_ = color;
+	}
+
+	void prepare();
+
+private:
+	glm::mat4  projection_;
+	glm::ivec4 viewport_;
+	glm::vec3  clear_color_;
+};
+
+#endif // CAMERA_H_

src/engine.cpp

@@ -0,0 +1,247 @@
+#include "engine.h"
+
+#include <vector>
+
+#include "../lib/glew/GL/glew.h"
+#include "../lib/glfw/glfw3.h"
+#include "../lib/glm/glm.hpp"
+#include "../lib/glm/gtc/matrix_transform.hpp"
+
+#include "buffer.h"
+#include "camera.h"
+#include "logger.h"
+#include "material.h"
+#include "mesh.h"
+#include "model.h"
+#include "shader.h"
+#include "state.h"
+#include "texture.h"
+#include "vertex.h"
+#include "world.h"
+
+constexpr int	 screen_width  = 800;
+constexpr int	 screen_height = 600;
+constexpr double fps_limit     = 1.0 / 60.0;
+
+Engine::Engine()
+    : window_(nullptr)
+    , screen_width_(screen_width)
+    , screen_height_(screen_height)
+    , last_update_time_(0.0)
+    , last_frame_time_(0.0)
+    , angle_(0.0)
+{
+	Logger::info("Engine created");
+}
+
+Engine::~Engine()
+{
+	Logger::info("Engine destroyed");
+	destroy();
+}
+
+void Engine::initialize()
+{
+	Logger::info("Initializing engine...");
+
+	// Initialize GLFW
+	if (!glfwInit()) {
+		Logger::error("Failed to initialize GLFW");
+		return;
+	}
+	Logger::info("GLFW initialized successfully");
+
+	glfwWindowHint(GLFW_RESIZABLE, false);
+	glfwWindowHint(GLFW_SAMPLES, 8);
+
+	// Create window
+	window_ = glfwCreateWindow(screen_width_, screen_height_,
+				   "Daniel Poveda", nullptr, nullptr);
+	if (window_ == nullptr) {
+		Logger::error("Failed to create OpenGL window");
+		glfwTerminate();
+		return;
+	}
+	glfwMakeContextCurrent(window_);
+
+	// Enable OpenGL features
+	glEnable(GL_DEPTH_TEST);
+	glEnable(GL_SCISSOR_TEST);
+
+	Logger::info(
+	    sstr("OpenGL initialized, version: ",
+		 reinterpret_cast<const char*>(glGetString(GL_VERSION))));
+
+	// Initialize GLEW
+	glewExperimental = GL_TRUE;
+	GLenum err	 = glewInit();
+	if (err != GLEW_OK) {
+		Logger::error(sstr(
+		    "Failed to initialize GLEW: ",
+		    reinterpret_cast<const char*>(glewGetErrorString(err))));
+		glfwTerminate();
+		return;
+	}
+
+	// Initialize default shader
+	Logger::info("Loading default shaders...");
+	state::default_shader = std::make_shared<Shader>(
+	    "data/shaders/vertex.glsl", "data/shaders/fragment.glsl");
+	if (std::strlen(state::default_shader->error()) > 0) {
+		Logger::error(sstr("Failed to initialize shaders: ",
+				   state::default_shader->error()));
+	} else {
+		Logger::info("Default shaders loaded successfully");
+	}
+
+	Logger::info("Engine initialization complete");
+}
+
+void Engine::run()
+{
+	Logger::info("Starting game loop...");
+
+	setup();
+	start();
+
+	last_update_time_ = glfwGetTime();
+	last_frame_time_  = glfwGetTime();
+
+	while (is_running()) {
+		const double now	= glfwGetTime();
+		const double delta_time = now - last_update_time_;
+
+		process_input(delta_time);
+		update(delta_time);
+
+		if (now - last_frame_time_ >= fps_limit) {
+			render();
+			last_frame_time_ = now;
+		}
+		last_update_time_ = now;
+	}
+
+	Logger::info("Game loop ended");
+}
+
+void Engine::destroy()
+{
+	if (window_) {
+		Logger::info("Shutting down engine...");
+		glfwTerminate();
+		window_ = nullptr;
+		Logger::info("Engine shutdown complete");
+	}
+}
+
+void Engine::setup()
+{
+	Logger::info("Setting up scene...");
+
+	// Create world
+	world_ = std::make_unique<World>();
+	Logger::info("World created");
+
+	// Create camera
+	camera_ = std::make_shared<Camera>();
+	camera_->set_position(glm::vec3(0.0f, 4.0f, 12.0f));
+	camera_->set_rotation(glm::vec3(glm::radians(-20.0f), 0.0f, 0.0f));
+	camera_->set_projection(
+	    glm::perspective(glm::radians(45.0f),
+			     static_cast<float>(screen_width_)
+				 / static_cast<float>(screen_height_),
+			     0.1f, 100.0f));
+	camera_->set_viewport(glm::ivec4(0, 0, screen_width_, screen_height_));
+	camera_->set_clear_color(glm::vec3(0.1f, 0.1f, 0.1f));
+	world_->add_entity(camera_);
+	Logger::info("Camera created and added to world");
+
+	// Load the box_stack model
+	auto box_stack_mesh = Mesh::load("data/models/box_stack.obj");
+	if (box_stack_mesh) {
+		auto box_stack_model = std::make_shared<Model>(box_stack_mesh);
+		box_stack_model->set_position(glm::vec3(-2.0f, -1.25f, 0.0f));
+		models_.push_back(box_stack_model);
+		world_->add_entity(box_stack_model);
+		Logger::info("Box stack model loaded and added to world");
+	}
+
+	// Load the gunslinger model
+	auto gunslinger_mesh = Mesh::load("data/models/gunslinger.obj");
+	if (gunslinger_mesh) {
+		auto gunslinger_model =
+		    std::make_shared<Model>(gunslinger_mesh);
+		gunslinger_model->set_position(glm::vec3(2.0f, 0.0f, 0.0f));
+		gunslinger_model->set_rotation(
+		    glm::vec3(0.0f, glm::radians(-30.0f), 0.0f));
+		gunslinger_model->set_scale(glm::vec3(0.1f, 0.1f, 0.1f));
+		models_.push_back(gunslinger_model);
+		world_->add_entity(gunslinger_model);
+		Logger::info("Gunslinger model loaded and added to world");
+	}
+
+	Logger::info("Scene setup complete");
+}
+
+void Engine::start()
+{
+	// Called once after setup, before the main loop
+	// Can be used for initialization that needs the scene to be ready
+}
+
+void Engine::process_input(const double delta_time)
+{
+	glfwPollEvents();
+
+	if (!camera_) {
+		return;
+	}
+
+	constexpr float camera_speed = 7.5f;
+
+	glm::vec3 forward = glm::vec3(0.0f, 0.0f, -1.0f);
+	glm::vec3 right	  = glm::vec3(1.0f, 0.0f, 0.0f);
+
+	glm::mat4 rotation = glm::mat4(1.0f);
+	rotation	   = glm::rotate(rotation, camera_->rotation().y,
+					 glm::vec3(0.0f, 1.0f, 0.0f));
+	rotation	   = glm::rotate(rotation, camera_->rotation().x,
+					 glm::vec3(1.0f, 0.0f, 0.0f));
+	forward		   = glm::vec3(rotation * glm::vec4(forward, 0.0f));
+	right		   = glm::vec3(rotation * glm::vec4(right, 0.0f));
+
+	const float movement = camera_speed * static_cast<float>(delta_time);
+	if (glfwGetKey(window_, GLFW_KEY_UP) == GLFW_PRESS) {
+		camera_->set_position(camera_->position() + forward * movement);
+	}
+	if (glfwGetKey(window_, GLFW_KEY_DOWN) == GLFW_PRESS) {
+		camera_->set_position(camera_->position() - forward * movement);
+	}
+	if (glfwGetKey(window_, GLFW_KEY_LEFT) == GLFW_PRESS) {
+		camera_->set_position(camera_->position() - right * movement);
+	}
+	if (glfwGetKey(window_, GLFW_KEY_RIGHT) == GLFW_PRESS) {
+		camera_->set_position(camera_->position() + right * movement);
+	}
+}
+
+void Engine::update(const double delta_time)
+{
+	// Update world
+	world_->update(static_cast<float>(delta_time));
+}
+
+void Engine::render()
+{
+	// Draw world
+	world_->draw();
+
+	// Swap buffers
+	glfwSwapBuffers(window_);
+}
+
+bool Engine::is_running() const
+{
+	return window_ && !glfwWindowShouldClose(window_)
+	    && !glfwGetKey(window_, GLFW_KEY_ESCAPE);
+}

src/engine.h

@@ -0,0 +1,51 @@
+#ifndef ENGINE_H_
+#define ENGINE_H_
+
+#include <memory>
+#include <vector>
+
+#include "../lib/glew/GL/glew.h"
+#include "../lib/glfw/glfw3.h"
+
+class World;
+class Camera;
+class Model;
+class Mesh;
+
+class Engine {
+public:
+	Engine();
+	~Engine();
+
+	void initialize();
+	void run();
+	void destroy();
+
+private:
+	// Lifecycle methods
+	void setup();
+	void start();
+	void process_input(const double delta_time);
+	void update(const double delta_time);
+	void render();
+
+	[[nodiscard]] bool is_running() const;
+
+	// Window and OpenGL
+	GLFWwindow* window_;
+	int	    screen_width_;
+	int	    screen_height_;
+
+	// Game objects
+	std::unique_ptr<World>		    world_;
+	std::shared_ptr<Camera>		    camera_;
+	std::vector<std::shared_ptr<Model>> models_;
+	std::shared_ptr<Mesh>		    mesh_;
+
+	// Game loop timing
+	double last_update_time_;
+	double last_frame_time_;
+	double angle_;
+};
+
+#endif // ENGINE_H_

src/entity.cpp

@@ -0,0 +1,13 @@
+#include "entity.h"
+
+Entity::Entity()
+    : position_(0.0f, 0.0f, 0.0f)
+    , rotation_(0.0f, 0.0f, 0.0f)
+    , scale_(1.0f, 1.0f, 1.0f)
+{
+}
+
+void Entity::move(const glm::vec3& vec)
+{
+	position_ += vec;
+}

src/entity.h

@@ -0,0 +1,55 @@
+#ifndef ENTITY_H_
+#define ENTITY_H_
+
+#include "../lib/glm/glm.hpp"
+
+class Entity {
+public:
+	Entity();
+	virtual ~Entity() = default;
+
+	[[nodiscard]] const glm::vec3& position() const
+	{
+		return position_;
+	}
+	void set_position(const glm::vec3& pos)
+	{
+		position_ = pos;
+	}
+
+	[[nodiscard]] const glm::vec3& rotation() const
+	{
+		return rotation_;
+	}
+	void set_rotation(const glm::vec3& rot)
+	{
+		rotation_ = rot;
+	}
+
+	[[nodiscard]] const glm::vec3& scale() const
+	{
+		return scale_;
+	}
+	void set_scale(const glm::vec3& scale)
+	{
+		scale_ = scale;
+	}
+
+	void move(const glm::vec3& vec);
+
+	virtual void update(const float delta_time)
+	{
+		// ...
+	}
+	virtual void draw()
+	{
+		// ...
+	}
+
+protected:
+	glm::vec3 position_;
+	glm::vec3 rotation_;
+	glm::vec3 scale_;
+};
+
+#endif // ENTITY_H_

src/logger.cpp

@@ -0,0 +1,57 @@
+#include "logger.h"
+
+#include <chrono>
+#include <iostream>
+
+namespace {
+
+std::string current_datetime_string()
+{
+	auto	  now	     = std::chrono::system_clock::now();
+	auto	  now_time_t = std::chrono::system_clock::to_time_t(now);
+	struct tm now_tm {};
+#ifdef _WIN32
+	localtime_s(&now_tm, &now_time_t);
+#else
+	localtime_r(&now_time_t, &now_tm);
+#endif
+
+	char buffer[30];
+	std::strftime(buffer, sizeof(buffer) / sizeof(char), "%Y-%m-%d %H:%M:%S",
+		      &now_tm);
+	return std::string{buffer};
+}
+
+} // namespace
+
+void Logger::info(const std::string& message)
+{
+	LogEntry entry;
+	entry.type = LogType::info;
+	entry.message =
+	    "[" + current_datetime_string() + "] [INFO]: " + message;
+
+	std::cout << "\x1B[32m" << entry.message << "\033[0m" << std::endl;
+	messages_.push_back(entry);
+}
+
+void Logger::warn(const std::string& message)
+{
+	LogEntry entry;
+	entry.type = LogType::warn;
+	entry.message =
+	    "[" + current_datetime_string() + "] [WARN]: " + message;
+
+	std::cout << "\x1B[93m" << entry.message << "\033[0m" << std::endl;
+	messages_.push_back(entry);
+}
+
+void Logger::error(const std::string& message)
+{
+	LogEntry entry;
+	entry.type	= LogType::error;
+	entry.message = "[" + current_datetime_string() + "] [ERROR]: " + message;
+
+	std::cerr << "\x1B[91m" << entry.message << "\033[0m" << std::endl;
+	messages_.push_back(entry);
+}

src/logger.h

@@ -0,0 +1,48 @@
+#ifndef LOGGER_H_
+#define LOGGER_H_
+
+#include <sstream>
+#include <string>
+#include <vector>
+
+// Utility: Concatenate any types into a string
+template <typename... Args>
+std::string sstr(Args&&... args)
+{
+	std::ostringstream stream;
+	stream << std::dec;
+	((stream << args), ...);
+	return stream.str();
+}
+
+// Log types
+enum class LogType {
+	info = 0,
+	warn,
+	error
+};
+
+// Log entry structure
+struct LogEntry {
+	LogType	    type{LogType::info};
+	std::string message{};
+};
+
+// Logger class
+class Logger {
+public:
+	static void info(const std::string& message);
+	static void warn(const std::string& message);
+	static void error(const std::string& message);
+
+	[[nodiscard]] static const std::vector<LogEntry>& messages()
+	{
+		return messages_;
+	}
+	static void clear() { messages_.clear(); }
+
+private:
+	inline static std::vector<LogEntry> messages_{};
+};
+
+#endif // LOGGER_H_

src/main.cpp

@@ -1,118 +1,26 @@
-/*#ifdef _MSC_VER
+// #ifdef _MSC_VER
-#pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
+// #pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
-#endif*/
+// #endif
 
+#define STB_IMAGE_IMPLEMENTATION
+#include "../lib/stb_image.h"
 
-#include <iostream>
+#define TINYOBJLOADER_IMPLEMENTATION
-#include <vector>
+#include "../lib/tiny_obj_loader.h"
 
-#include "../lib/glew/GL/glew.h"
+#include "engine.h"
-#include "../lib/glfw/glfw3.h"
-#include "../lib/glm/glm.hpp"
-#include "../lib/glm/gtc/matrix_transform.hpp"
 
-#include "vertex.h"
+int main()
-#include "shader.h"
+{
-#include "buffer.h"
+	Engine engine;
 
-#define SCREEN_WIDTH 800
+	engine.initialize();
-#define SCREEN_HEIGHT 600
+	engine.run();
+	engine.destroy();
 
-int main() {
+	// _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDOUT);
-	// Initialize OpenGL
+	// _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
-	if (!glfwInit()) {
+	// _CrtDumpMemoryLeaks();
-		std::cerr << "Failed to initialize glfw\n";
-		return 1;
-	}
-
-	glfwWindowHint(GLFW_RESIZABLE, false);
-	glfwWindowHint(GLFW_SAMPLES, 8);
-	
-	//glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-	//glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
-	//glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-
-	GLFWwindow* win = glfwCreateWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "Daniel Poveda", nullptr, nullptr);
-	if (win == nullptr) {
-		std::cerr << "Failed to create opengl window\n";
-		glfwTerminate();
-		return 1;
-	}
-	glfwMakeContextCurrent(win);
-
-	glEnable(GL_DEPTH_TEST);
-	glEnable(GL_SCISSOR_TEST);
-
-	std::cout << "OpenGL initialized, version: " << glGetString(GL_VERSION) << "\n";
-
-	// Initialize GLEW
-	glewExperimental = GL_TRUE;
-	GLenum err = glewInit();
-	if (err != GLEW_OK) {
-		std::cerr << "Failed to initialize GLEW: " << glewGetErrorString(err) << "\n";
-		glfwTerminate();
-		return 1;
-	}
-
-	// Logic
-	std::vector<Vertex> vertices = {
-		{{0.0f, 0.5f, 0.0f}, {0.0f, 1.0f, 0.0f}},
-		{{-0.5f, -0.5f, 0.0f}, {0.0f, 0.0f, 1.0f}},
-		{{0.5f, -0.5f, 0.0f}, {1.0f, 0.0f, 0.0f}} 
-	};
-	std::vector<uint16_t> indices = { 0, 1, 2 };
-
-	Buffer buffer(vertices, indices);
-	Shader shader("data/vertex.glsl", "data/fragment.glsl");
-	if (std::strlen(shader.getError()) > 0) {
-		std::cerr << "Failed to initialize shaders: " << shader.getError() << "\n";
-	}
-
-	glm::mat4 projection = glm::perspective(glm::radians(45.0f), static_cast<float>(SCREEN_WIDTH) / SCREEN_HEIGHT, 0.1f, 100.0f);
-	//glm::mat4 view = glm::translate(glm::mat4(1.0f), glm::vec3(0, 0, 6));
-	glm::mat4 view = glm::lookAt(glm::vec3(0, 0, 6), glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));
-
-	// main loop
-	double angle = 0.0;
-	double lastTime = glfwGetTime();
-	while (!glfwWindowShouldClose(win) && !glfwGetKey(win, GLFW_KEY_ESCAPE)) {
-		// Delta
-		double delta_time = glfwGetTime() - lastTime;
-		lastTime = glfwGetTime();
-
-		// Reset window
-		int screenWidth, screenHeight;
-		glfwGetWindowSize(win, &screenWidth, &screenHeight);
-		glViewport(0, 0, screenWidth, screenHeight);
-
-		glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
-		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-		shader.Use();
-
-		// Logic
-		angle += 32.0 * delta_time;
-
-		for (int row = 0; row < 3; ++row) {
-			for (int col = 0; col < 3; ++col) {
-				glm::mat4 model = glm::translate(glm::mat4(1.0), glm::vec3(-3.0f + static_cast<float>(col) * 3.0f, 0.0f, static_cast<float>(-row) * 3.0f));
-				model = glm::rotate(model, glm::radians(static_cast<float>(angle)), glm::vec3(0, 1, 0));
-
-				glm::mat4 mvp = projection * view * model;
-
-				Shader::setMat4(shader.getLocation("mvp"), mvp);
-
-				buffer.Draw(shader);
-			}
-		}
-
-		// Refresh screen
-		glfwSwapBuffers(win);
-		glfwPollEvents();
-	}
-
-	// Shutdown
-	glfwTerminate();
 
 	return 0;
 }

src/material.cpp

@@ -0,0 +1,61 @@
+#include "material.h"
+
+#include "../lib/glm/glm.hpp"
+
+#include "shader.h"
+#include "state.h"
+#include "texture.h"
+
+Material::Material(const std::shared_ptr<Texture>& tex,
+		   const std::shared_ptr<Shader>&  shader)
+    : shader_(shader), texture_(tex)
+{
+}
+
+const std::shared_ptr<Shader>& Material::shader() const
+{
+	return shader_ ? shader_ : state::default_shader;
+}
+
+std::shared_ptr<Shader>& Material::shader()
+{
+	return shader_ ? shader_ : state::default_shader;
+}
+
+void Material::set_shader(const std::shared_ptr<Shader>& shader)
+{
+	shader_ = shader;
+}
+
+void Material::prepare()
+{
+	// Activate shader
+	std::shared_ptr<Shader> active_shader = shader();
+	if (!active_shader)
+		return;
+
+	active_shader->use();
+
+	// Set uniform variables
+	const glm::mat4 mvp =
+	    state::projection_matrix * state::view_matrix * state::model_matrix;
+	const int mvp_loc = active_shader->uniform_location("mvp");
+	Shader::set_mat4(mvp_loc, mvp);
+
+	// Set texture-related uniforms
+	const int use_texture_loc =
+	    active_shader->uniform_location("useTexture");
+	if (texture_) {
+		Shader::set_int(use_texture_loc, 1);
+		const int sampler_loc =
+		    active_shader->uniform_location("texSampler");
+		Shader::set_int(sampler_loc, 0); // Texture unit 0
+	} else {
+		Shader::set_int(use_texture_loc, 0);
+	}
+
+	// Bind texture if available
+	if (texture_) {
+		texture_->bind();
+	}
+}

src/material.h

@@ -0,0 +1,35 @@
+#ifndef MATERIAL_H_
+#define MATERIAL_H_
+
+#include <memory>
+
+class Shader;
+class Texture;
+
+class Material {
+public:
+	Material(const std::shared_ptr<Texture>& tex	= nullptr,
+		 const std::shared_ptr<Shader>&	 shader = nullptr);
+	~Material() = default;
+
+	[[nodiscard]] const std::shared_ptr<Shader>& shader() const;
+	[[nodiscard]] std::shared_ptr<Shader>&	     shader();
+	void set_shader(const std::shared_ptr<Shader>& shader);
+
+	[[nodiscard]] const std::shared_ptr<Texture>& texture() const
+	{
+		return texture_;
+	}
+	void set_texture(const std::shared_ptr<Texture>& tex)
+	{
+		texture_ = tex;
+	}
+
+	void prepare();
+
+private:
+	std::shared_ptr<Shader>	 shader_;
+	std::shared_ptr<Texture> texture_;
+};
+
+#endif // MATERIAL_H_

src/mesh.cpp

@@ -0,0 +1,194 @@
+#include "mesh.h"
+
+#include <filesystem>
+#include <string>
+#include <unordered_map>
+
+#include "../lib/tiny_obj_loader.h"
+
+#include "buffer.h"
+#include "logger.h"
+#include "material.h"
+#include "shader.h"
+#include "state.h"
+#include "texture.h"
+#include "vertex.h"
+
+// Helper structures and functions for OBJ loading
+namespace {
+
+struct LoadContext {
+	std::string						  base_dir;
+	std::unordered_map<std::string, std::shared_ptr<Texture>> texture_cache;
+	const std::vector<tinyobj::material_t>*			  materials;
+	const std::shared_ptr<Shader>&				  shader;
+};
+
+Vertex create_vertex(const tinyobj::attrib_t& attrib,
+		     const tinyobj::index_t&  idx)
+{
+	Vertex vertex;
+
+	// Position
+	if (idx.vertex_index >= 0) {
+		vertex.position.x = attrib.vertices[3 * idx.vertex_index + 0];
+		vertex.position.y = attrib.vertices[3 * idx.vertex_index + 1];
+		vertex.position.z = attrib.vertices[3 * idx.vertex_index + 2];
+	}
+
+	// Color (default to white)
+	vertex.color = glm::vec3(1.0f, 1.0f, 1.0f);
+
+	// Texture coordinates
+	vertex.tex_coord = glm::vec2(0.0f, 0.0f);
+	if (idx.texcoord_index >= 0) {
+		vertex.tex_coord.x = attrib.texcoords[2 * idx.texcoord_index + 0];
+		vertex.tex_coord.y = attrib.texcoords[2 * idx.texcoord_index + 1];
+	}
+
+	return vertex;
+}
+
+void process_shape(const tinyobj::shape_t&   shape,
+		   const tinyobj::attrib_t& attrib,
+		   std::vector<Vertex>&	    out_vertices,
+		   std::vector<uint16_t>&   out_indices)
+{
+	// Process all indices - create one vertex per index
+	for (size_t i = 0; i < shape.mesh.indices.size(); ++i) {
+		const tinyobj::index_t& idx = shape.mesh.indices[i];
+		Vertex			vertex	= create_vertex(attrib, idx);
+
+		out_vertices.push_back(vertex);
+		out_indices.push_back(
+		    static_cast<uint16_t>(out_vertices.size() - 1));
+	}
+}
+
+std::shared_ptr<Texture> load_material_texture(int	    material_id,
+					       LoadContext& context)
+{
+	if (material_id < 0
+	    || material_id >= static_cast<int>(context.materials->size())) {
+		return nullptr;
+	}
+
+	const auto& mat		 = (*context.materials)[material_id];
+	std::string texture_name = mat.diffuse_texname;
+
+	// Try ambient texture if diffuse is not available
+	if (texture_name.empty()) {
+		texture_name = mat.ambient_texname;
+	}
+
+	if (texture_name.empty()) {
+		return nullptr;
+	}
+
+	// Check cache first
+	auto it = context.texture_cache.find(texture_name);
+	if (it != context.texture_cache.end()) {
+		return it->second;
+	}
+
+	// Load texture
+	std::string texture_path = context.base_dir + texture_name;
+	auto	    texture	 = Texture::load(texture_path.c_str());
+
+	if (texture) {
+		context.texture_cache[texture_name] = texture;
+		Logger::info(sstr("Loaded texture: ", texture_path));
+	} else {
+		Logger::warn(sstr("Failed to load texture: ", texture_path));
+	}
+
+	return texture;
+}
+
+void create_buffer_for_shape(const tinyobj::shape_t&   shape,
+			     const std::vector<Vertex>&	   vertices,
+			     const std::vector<uint16_t>& indices,
+			     LoadContext&		   context,
+			     std::shared_ptr<Mesh>&	   mesh)
+{
+	auto buffer = std::make_shared<Buffer>(vertices, indices);
+
+	// Use first material ID from the shape
+	int material_id = -1;
+	if (!shape.mesh.material_ids.empty() && shape.mesh.material_ids[0] >= 0) {
+		material_id = shape.mesh.material_ids[0];
+	}
+
+	auto texture = load_material_texture(material_id, context);
+	auto material_shader =
+	    context.shader ? context.shader : state::default_shader;
+
+	Material mat(texture, material_shader);
+	mesh->add_buffer(buffer, mat);
+}
+
+} // namespace
+
+void Mesh::add_buffer(const std::shared_ptr<Buffer>& buffer,
+		      const Material&		     material)
+{
+	buffers_.push_back(buffer);
+	materials_.push_back(material);
+}
+
+std::shared_ptr<Mesh> Mesh::load(const char*			filename,
+				 const std::shared_ptr<Shader>& shader)
+{
+	Logger::info(sstr("Loading mesh from: ", filename));
+
+	// Load OBJ file
+	tinyobj::attrib_t		 attrib;
+	std::vector<tinyobj::shape_t>	 shapes;
+	std::vector<tinyobj::material_t> materials;
+	std::string			 err;
+
+	std::filesystem::path obj_path(filename);
+	std::string	      base_dir = obj_path.parent_path().string();
+	if (!base_dir.empty()) {
+		base_dir += "/";
+	}
+
+	if (!tinyobj::LoadObj(&attrib, &shapes, &materials, &err, filename,
+			      base_dir.c_str())) {
+		Logger::error(
+		    sstr("Failed to load OBJ file: ", filename, " - ", err));
+		return nullptr;
+	}
+
+	if (!err.empty()) {
+		Logger::warn(sstr("TinyObjLoader warning: ", err));
+	}
+
+	// Setup load context
+	LoadContext context{base_dir, {}, &materials, shader};
+
+	// Process each shape
+	auto mesh = std::make_shared<Mesh>();
+	for (const auto& shape : shapes) {
+		Logger::info(sstr("Processing shape: ", shape.name));
+
+		std::vector<Vertex>   vertices;
+		std::vector<uint16_t> indices;
+
+		process_shape(shape, attrib, vertices, indices);
+		create_buffer_for_shape(shape, vertices, indices, context, mesh);
+	}
+
+	Logger::info(sstr("Mesh loaded successfully with ", mesh->num_buffers(),
+			  " buffers"));
+	return mesh;
+}
+
+void Mesh::draw()
+{
+	// Draw each buffer with its material
+	for (size_t i = 0; i < buffers_.size(); ++i) {
+		materials_[i].prepare();
+		buffers_[i]->draw(*materials_[i].shader());
+	}
+}

src/mesh.h

@@ -0,0 +1,53 @@
+#ifndef MESH_H_
+#define MESH_H_
+
+#include <memory>
+#include <vector>
+
+#include "material.h"
+
+class Buffer;
+class Shader;
+
+class Mesh {
+public:
+	Mesh()	= default;
+	~Mesh() = default;
+
+	static std::shared_ptr<Mesh>
+	load(const char*		    filename,
+	     const std::shared_ptr<Shader>& shader = nullptr);
+
+	void add_buffer(const std::shared_ptr<Buffer>& buffer,
+			const Material&		       material);
+
+	[[nodiscard]] size_t num_buffers() const
+	{
+		return buffers_.size();
+	}
+	[[nodiscard]] const std::shared_ptr<Buffer>& buffer(size_t index) const
+	{
+		return buffers_[index];
+	}
+	[[nodiscard]] std::shared_ptr<Buffer>& buffer(size_t index)
+	{
+		return buffers_[index];
+	}
+
+	[[nodiscard]] const Material& material(size_t index) const
+	{
+		return materials_[index];
+	}
+	[[nodiscard]] Material& material(size_t index)
+	{
+		return materials_[index];
+	}
+
+	void draw();
+
+private:
+	std::vector<std::shared_ptr<Buffer>> buffers_;
+	std::vector<Material>		     materials_;
+};
+
+#endif // MESH_H_

src/model.cpp

@@ -0,0 +1,35 @@
+#include "model.h"
+#include "mesh.h"
+#include "state.h"
+#include "../lib/glm/gtc/matrix_transform.hpp"
+
+Model::Model(const std::shared_ptr<Mesh>& mesh)
+    : mesh_(mesh)
+{
+}
+
+void Model::draw()
+{
+	if (!mesh_)
+		return;
+
+	// Build model matrix: Translation * Rotation * Scale
+	glm::mat4 model = glm::mat4(1.0f);
+
+	// Translation
+	model = glm::translate(model, position_);
+
+	// Rotation (applying X, Y, Z rotations)
+	model = glm::rotate(model, rotation_.x, glm::vec3(1.0f, 0.0f, 0.0f));
+	model = glm::rotate(model, rotation_.y, glm::vec3(0.0f, 1.0f, 0.0f));
+	model = glm::rotate(model, rotation_.z, glm::vec3(0.0f, 0.0f, 1.0f));
+
+	// Scale
+	model = glm::scale(model, scale_);
+
+	// Set the model matrix in state
+	state::model_matrix = model;
+
+	// Draw the mesh
+	mesh_->draw();
+}

src/model.h

@@ -0,0 +1,19 @@
+#ifndef MODEL_H_
+#define MODEL_H_
+
+#include "entity.h"
+#include <memory>
+
+class Mesh;
+
+class Model : public Entity {
+public:
+	Model(const std::shared_ptr<Mesh>& mesh);
+
+	virtual void draw() override;
+
+private:
+	std::shared_ptr<Mesh> mesh_;
+};
+
+#endif // MODEL_H_

src/shader.cpp

@@ -1,19 +1,20 @@
 #include "shader.h"
 
-#include <vector>
 #include <fstream>
 #include <sstream>
-#include <iostream>
+#include <vector>
 
 #include "../lib/glew/GL/glew.h"
 #include "../lib/glfw/glfw3.h"
 
+#include "logger.h"
 #include "vertex.h"
 
-Shader::Shader(const std::string& vertexPath, const std::string& fragmentPath)
+Shader::Shader(const std::string& vertex_path, const std::string& fragment_path)
 {
-	const uint32_t vshader = CompileShader(GL_VERTEX_SHADER, vertexPath);
+	const uint32_t vshader = compile_shader(GL_VERTEX_SHADER, vertex_path);
-	const uint32_t fshader = CompileShader(GL_FRAGMENT_SHADER, fragmentPath);
+	const uint32_t fshader =
+	    compile_shader(GL_FRAGMENT_SHADER, fragment_path);
 
 	if (vshader == 0 || fshader == 0) {
 		program_id_ = 0;
@@ -30,7 +31,8 @@ Shader::Shader(const std::string& vertexPath, const std::string& fragmentPath)
 	glGetProgramiv(program_id_, GL_LINK_STATUS, &ret);
 	if (ret == GL_FALSE) {
 		char buffer[1024];
-		glGetProgramInfoLog(program_id_, sizeof(buffer), nullptr, buffer);
+		glGetProgramInfoLog(program_id_, sizeof(buffer), nullptr,
+				    buffer);
 		error_ = buffer;
 		glDeleteProgram(program_id_);
 		program_id_ = 0;
@@ -40,67 +42,80 @@ Shader::Shader(const std::string& vertexPath, const std::string& fragmentPath)
 	glDeleteShader(fshader);
 }
 
-void Shader::Use() const
+void Shader::use() const
 {
 	if (program_id_ != 0)
 		glUseProgram(program_id_);
 }
 
-void Shader::SetupAttribs() const
+void Shader::setup_attribs() const
 {
 	int loc = glGetAttribLocation(program_id_, "vpos");
 	if (loc != -1) {
 		glEnableVertexAttribArray(loc);
-		glVertexAttribPointer(loc, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<const void*>(offsetof(Vertex, position)));
+		glVertexAttribPointer(
+		    loc, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex),
+		    reinterpret_cast<const void*>(offsetof(Vertex, position)));
 	}
 
 	loc = glGetAttribLocation(program_id_, "vcolor");
 	if (loc != -1) {
 		glEnableVertexAttribArray(loc);
-		glVertexAttribPointer(loc, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<const void*>(offsetof(Vertex, color)));
+		glVertexAttribPointer(
+		    loc, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex),
+		    reinterpret_cast<const void*>(offsetof(Vertex, color)));
+	}
+
+	loc = glGetAttribLocation(program_id_, "vtexcoord");
+	if (loc != -1) {
+		glEnableVertexAttribArray(loc);
+		glVertexAttribPointer(
+		    loc, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex),
+		    reinterpret_cast<const void*>(offsetof(Vertex, tex_coord)));
 	}
 }
 
-int Shader::getLocation(const char* key) const
+int Shader::uniform_location(const char* key) const
 {
 	return glGetUniformLocation(program_id_, key);
 }
 
-void Shader::setInt(int loc, int value)
+void Shader::set_int(int loc, int value)
 {
 	if (loc != -1)
 		glUniform1i(loc, value);
 }
 
-void Shader::setFloat(int loc, float value)
+void Shader::set_float(int loc, float value)
 {
 	if (loc != -1)
 		glUniform1f(loc, value);
 }
 
-void Shader::setVec3(int loc, const glm::vec3& value)
+void Shader::set_vec3(int loc, const glm::vec3& value)
 {
 	if (loc != -1)
 		glUniform3fv(loc, 1, &value[0]);
 }
 
-void Shader::setVec4(int loc, const glm::vec4& value)
+void Shader::set_vec4(int loc, const glm::vec4& value)
 {
 	if (loc != -1)
 		glUniform4fv(loc, 1, &value[0]);
 }
 
-void Shader::setMat4(int loc, const glm::mat4& value)
+void Shader::set_mat4(int loc, const glm::mat4& value)
 {
 	if (loc != -1)
 		glUniformMatrix4fv(loc, 1, GL_FALSE, &value[0][0]);
 }
 
-std::string Shader::ReadShaderFile(const std::string& filename)
+std::string Shader::read_shader_file(const std::string& filename)
 {
 	std::ifstream file(filename);
 	if (!file) {
-		error_ = "Failed to open shader file: " + filename + "\n";
+		error_ = "Failed to open shader file: " + filename;
+		Logger::error(sstr("Failed to open shader file: ", filename));
 		return std::string{0};
 	}
 
@@ -109,13 +124,18 @@ std::string Shader::ReadShaderFile(const std::string& filename)
 	return buffer.str();
 }
 
-uint32_t Shader::CompileShader(uint32_t type, const std::string& source_path)
+uint32_t Shader::compile_shader(uint32_t type, const std::string& source_path)
 {
-	std::string source = ReadShaderFile(source_path);
+	const char* shader_type_name =
-	//std::cout << "SHADER FILE: " << source << "\n";
+	    (type == GL_VERTEX_SHADER) ? "vertex" : "fragment";
+
+	std::string source = read_shader_file(source_path);
 	if (source.empty())
 		return 0;
 
+	Logger::info(
+	    sstr("Compiling ", shader_type_name, " shader: ", source_path));
+
 	const uint32_t shader	   = glCreateShader(type);
 	const char*    shader_code = source.c_str();
 
@@ -129,9 +149,12 @@ uint32_t Shader::CompileShader(uint32_t type, const std::string& source_path)
 		char buffer[1024];
 		glGetShaderInfoLog(shader, sizeof(buffer), nullptr, buffer);
 		error_ = buffer;
+		Logger::error(sstr("Shader compilation failed (",
+				   shader_type_name, "): ", buffer));
 		glDeleteShader(shader);
 		return 0;
 	}
 
+	Logger::info(sstr(shader_type_name, " shader compiled successfully"));
 	return shader;
 }

src/shader.h

@@ -9,29 +9,35 @@
 
 class Shader {
 public:
-	Shader(const std::string& vertex_path, const std::string& fragment_path);
+	Shader(const std::string& vertex_path,
+	       const std::string& fragment_path);
 
-	void Use() const;
+	void use() const;
-	void SetupAttribs() const;
+	void setup_attribs() const;
 
-	uint32_t getId() const { return program_id_; }
+	[[nodiscard]] uint32_t id() const
-	const char* getError() const { return error_.c_str(); }
+	{
+		return program_id_;
+	}
+	[[nodiscard]] const char* error() const
+	{
+		return error_.c_str();
+	}
 
-	int getLocation(const char* key) const;
+	[[nodiscard]] int uniform_location(const char* key) const;
 
-	static void setInt(int loc, int value);
+	static void set_int(int loc, int value);
-	static void setFloat(int loc, float value);
+	static void set_float(int loc, float value);
-	static void setVec3(int loc, const glm::vec3& value);
+	static void set_vec3(int loc, const glm::vec3& value);
-	static void setVec4(int loc, const glm::vec4& value);
+	static void set_vec4(int loc, const glm::vec4& value);
-	static void setMat4(int loc, const glm::mat4& value);
+	static void set_mat4(int loc, const glm::mat4& value);
 
 private:
 	uint32_t    program_id_;
 	std::string error_;
 
-	std::string ReadShaderFile(const std::string& filename);
+	std::string read_shader_file(const std::string& filename);
-	uint32_t CompileShader(uint32_t type, const std::string& source_path);
+	uint32_t compile_shader(uint32_t type, const std::string& source_path);
 };
 
-
 #endif // SHADER_H_

src/state.h

@@ -0,0 +1,18 @@
+#ifndef STATE_H_
+#define STATE_H_
+
+#include <memory>
+#include "../lib/glm/glm.hpp"
+
+class Shader;
+
+namespace state {
+
+inline std::shared_ptr<Shader> default_shader	 = nullptr;
+inline glm::mat4	       projection_matrix = glm::mat4(1.0f);
+inline glm::mat4	       view_matrix	 = glm::mat4(1.0f);
+inline glm::mat4	       model_matrix	 = glm::mat4(1.0f);
+
+} // namespace state
+
+#endif // STATE_H_

src/texture.cpp

@@ -0,0 +1,81 @@
+#include "texture.h"
+
+#include <algorithm>
+
+#include "../lib/glew/GL/glew.h"
+#include "../lib/glfw/glfw3.h"
+#include "../lib/stb_image.h"
+
+#include "logger.h"
+
+Texture::Texture(uint32_t id, const glm::ivec2& size)
+    : id_(id), size_(size)
+{
+}
+
+Texture::~Texture()
+{
+	if (id_ != 0) {
+		glDeleteTextures(1, &id_);
+		Logger::info(sstr("Texture ", id_, " destroyed"));
+	}
+}
+
+std::shared_ptr<Texture> Texture::load(const char* filename)
+{
+	Logger::info(sstr("Loading texture: ", filename));
+
+	// Load image
+	int	 width, height, channels;
+	stbi_uc* pixels =
+	    stbi_load(filename, &width, &height, &channels, STBI_rgb_alpha);
+
+	if (!pixels) {
+		Logger::error(sstr("Failed to load texture: ", filename, " - ",
+				   stbi_failure_reason()));
+		return nullptr;
+	}
+
+	// Flip image vertically (OpenGL expects bottom row first)
+	const int row_size   = width * 4; // 4 channels (RGBA)
+	auto*	  row_buffer = new stbi_uc[row_size];
+	for (int y = 0; y < height / 2; ++y) {
+		stbi_uc* row1 = pixels + y * row_size;
+		stbi_uc* row2 = pixels + (height - 1 - y) * row_size;
+		std::copy(row1, row1 + row_size, row_buffer);
+		std::copy(row2, row2 + row_size, row1);
+		std::copy(row_buffer, row_buffer + row_size, row2);
+	}
+	delete[] row_buffer;
+
+	// Generate OpenGL texture
+	GLuint texture_id;
+	glGenTextures(1, &texture_id);
+	glBindTexture(GL_TEXTURE_2D, texture_id);
+
+	// Upload texture data
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
+		     GL_UNSIGNED_BYTE, pixels);
+
+	// Set trilinear filtering
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+			GL_LINEAR_MIPMAP_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	// Generate mipmaps
+	glGenerateMipmap(GL_TEXTURE_2D);
+
+	// Free image data
+	stbi_image_free(pixels);
+
+	Logger::info(sstr("Texture loaded successfully: ", filename, " (",
+			  width, "x", height, ", ", channels, " channels)"));
+
+	return std::shared_ptr<Texture>(
+	    new Texture(texture_id, glm::ivec2(width, height)));
+}
+
+void Texture::bind() const
+{
+	glBindTexture(GL_TEXTURE_2D, id_);
+}

src/texture.h

@@ -0,0 +1,35 @@
+#ifndef TEXTURE_H_
+#define TEXTURE_H_
+
+#include <cstdint>
+#include <memory>
+#include <string>
+
+#include "../lib/glm/glm.hpp"
+
+class Texture {
+public:
+	Texture() = delete;
+	~Texture();
+
+	static std::shared_ptr<Texture> load(const char* filename);
+
+	[[nodiscard]] uint32_t id() const
+	{
+		return id_;
+	}
+	[[nodiscard]] const glm::ivec2& size() const
+	{
+		return size_;
+	}
+
+	void bind() const;
+
+private:
+	Texture(uint32_t id, const glm::ivec2& size);
+
+	uint32_t   id_;
+	glm::ivec2 size_;
+};
+
+#endif // TEXTURE_H_

src/vertex.h

@@ -4,8 +4,9 @@
 #include "../lib/glm/glm.hpp"
 
 struct Vertex {
-	glm::vec3 position{ 0.0f, 0.0f, 0.0f };
+	glm::vec3 position{0.0f, 0.0f, 0.0f};
-	glm::vec3 color{ 0.0f, 0.0f, 0.0f };
+	glm::vec3 color{0.0f, 0.0f, 0.0f};
+	glm::vec2 tex_coord{0.0f, 0.0f};
 };
 
 #endif // VERTEX_H_

src/world.cpp

@@ -0,0 +1,68 @@
+#include "world.h"
+
+#include <algorithm>
+
+#include "camera.h"
+#include "entity.h"
+#include "logger.h"
+
+void World::add_entity(const std::shared_ptr<Entity>& entity)
+{
+	entities_.push_back(entity);
+
+	// Check if entity is a camera
+	std::shared_ptr<Camera> camera =
+	    std::dynamic_pointer_cast<Camera>(entity);
+	if (camera) {
+		cameras_.push_back(camera);
+		Logger::info(sstr("Camera added to world (total cameras: ",
+				  cameras_.size(), ")"));
+	} else {
+		Logger::info(sstr("Entity added to world (total entities: ",
+				  entities_.size(), ")"));
+	}
+}
+
+void World::remove_entity(const std::shared_ptr<Entity>& entity)
+{
+	// Remove from entities list
+	auto it = std::find(entities_.begin(), entities_.end(), entity);
+	if (it != entities_.end()) {
+		entities_.erase(it);
+		Logger::info("Entity removed from world");
+	}
+
+	// Check if entity is a camera and remove from cameras list
+	std::shared_ptr<Camera> camera =
+	    std::dynamic_pointer_cast<Camera>(entity);
+	if (camera) {
+		auto camIt =
+		    std::find(cameras_.begin(), cameras_.end(), camera);
+		if (camIt != cameras_.end()) {
+			cameras_.erase(camIt);
+			Logger::info("Camera removed from world");
+		}
+	}
+}
+
+void World::update(float delta_time)
+{
+	for (auto& entity : entities_) {
+		entity->update(delta_time);
+	}
+}
+
+void World::draw()
+{
+	// Draw for each camera
+	for (auto& camera : cameras_) {
+		// Prepare the camera (sets viewport, projection, view, clears
+		// screen)
+		camera->prepare();
+
+		// Draw all entities
+		for (auto& entity : entities_) {
+			entity->draw();
+		}
+	}
+}

src/world.h

@@ -0,0 +1,38 @@
+#ifndef WORLD_H_
+#define WORLD_H_
+
+#include <memory>
+#include <vector>
+
+class Entity;
+class Camera;
+
+class World {
+public:
+	World() = default;
+
+	void add_entity(const std::shared_ptr<Entity>& entity);
+	void remove_entity(const std::shared_ptr<Entity>& entity);
+
+	[[nodiscard]] size_t num_entities() const
+	{
+		return entities_.size();
+	}
+	[[nodiscard]] const std::shared_ptr<Entity>& entity(size_t index) const
+	{
+		return entities_[index];
+	}
+	[[nodiscard]] std::shared_ptr<Entity>& entity(size_t index)
+	{
+		return entities_[index];
+	}
+
+	void update(float delta_time);
+	void draw();
+
+private:
+	std::vector<std::shared_ptr<Entity>> entities_;
+	std::vector<std::shared_ptr<Camera>> cameras_;
+};
+
+#endif // WORLD_H_

ugine3d.vcxproj

@@ -72,20 +72,20 @@
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <OutDir>$(SolutionDir)Build\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>$(SolutionDir)build\$(Platform)\$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)Build\obj\$(Platform)\$(Configuration)\</IntDir>
+    <IntDir>$(SolutionDir)build\obj\$(Platform)\$(Configuration)\</IntDir>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <OutDir>$(SolutionDir)Build\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>$(SolutionDir)build\$(Platform)\$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)Build\obj\$(Platform)\$(Configuration)\</IntDir>
+    <IntDir>$(SolutionDir)build\obj\$(Platform)\$(Configuration)\</IntDir>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <OutDir>$(SolutionDir)Build\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>$(SolutionDir)build\$(Platform)\$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)Build\obj\$(Platform)\$(Configuration)\</IntDir>
+    <IntDir>$(SolutionDir)build\obj\$(Platform)\$(Configuration)\</IntDir>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <OutDir>$(SolutionDir)Build\$(Platform)\$(Configuration)\</OutDir>
+    <OutDir>$(SolutionDir)build\$(Platform)\$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)Build\obj\$(Platform)\$(Configuration)\</IntDir>
+    <IntDir>$(SolutionDir)build\obj\$(Platform)\$(Configuration)\</IntDir>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
@@ -93,12 +93,12 @@
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>../lib/glew</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>lib/glew</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>GLEW_STATIC;_MBCS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
-      <AdditionalLibraryDirectories>../lib/glfw</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>lib/glfw</AdditionalLibraryDirectories>
       <AdditionalDependencies>glfw3.win32.lib;opengl32.lib;kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
@@ -108,12 +108,12 @@
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>../lib/glew</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>lib/glew</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>GLEW_STATIC;_MBCS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
-      <AdditionalLibraryDirectories>../lib/glfw</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>lib/glfw</AdditionalLibraryDirectories>
       <AdditionalDependencies>glfw3.win64.lib;opengl32.lib;kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
@@ -125,14 +125,14 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>../lib/glew</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>lib/glew</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>GLEW_STATIC;_MBCS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalLibraryDirectories>../lib/glfw</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>lib/glfw</AdditionalLibraryDirectories>
       <AdditionalDependencies>glfw3.win32.lib;opengl32.lib;kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
@@ -144,35 +144,55 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>../lib/glew</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>lib/glew</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>GLEW_STATIC;_MBCS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalLibraryDirectories>../lib/glfw</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>lib/glfw</AdditionalLibraryDirectories>
       <AdditionalDependencies>glfw3.win64.lib;opengl32.lib;kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClInclude Include="..\lib\glew\GL\glew.h" />
+    <ClInclude Include="lib\glew\GL\glew.h" />
-    <ClInclude Include="..\lib\glfw\glfw3.h" />
+    <ClInclude Include="lib\glfw\glfw3.h" />
-    <ClInclude Include="..\lib\glfw\glfw3native.h" />
+    <ClInclude Include="lib\glfw\glfw3native.h" />
-    <ClInclude Include="..\src\buffer.h" />
+    <ClInclude Include="lib\stb\stb_image.h" />
-    <ClInclude Include="..\src\shader.h" />
+    <ClInclude Include="src\buffer.h" />
-    <ClInclude Include="..\src\vertex.h" />
+    <ClInclude Include="src\camera.h" />
+    <ClInclude Include="src\engine.h" />
+    <ClInclude Include="src\entity.h" />
+    <ClInclude Include="src\logger.h" />
+    <ClInclude Include="src\material.h" />
+    <ClInclude Include="src\mesh.h" />
+    <ClInclude Include="src\model.h" />
+    <ClInclude Include="src\shader.h" />
+    <ClInclude Include="src\state.h" />
+    <ClInclude Include="src\texture.h" />
+    <ClInclude Include="src\vertex.h" />
+    <ClInclude Include="src\world.h" />
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="..\lib\glew\glew.c" />
+    <ClCompile Include="lib\glew\glew.c" />
-    <ClCompile Include="..\src\buffer.cpp" />
+    <ClCompile Include="src\buffer.cpp" />
-    <ClCompile Include="..\src\main.cpp" />
+    <ClCompile Include="src\camera.cpp" />
-    <ClCompile Include="..\src\shader.cpp" />
+    <ClCompile Include="src\engine.cpp" />
-    <ClCompile Include="..\src\vertex.cpp" />
+    <ClCompile Include="src\entity.cpp" />
+    <ClCompile Include="src\logger.cpp" />
+    <ClCompile Include="src\main.cpp" />
+    <ClCompile Include="src\material.cpp" />
+    <ClCompile Include="src\mesh.cpp" />
+    <ClCompile Include="src\model.cpp" />
+    <ClCompile Include="src\shader.cpp" />
+    <ClCompile Include="src\texture.cpp" />
+    <ClCompile Include="src\vertex.cpp" />
+    <ClCompile Include="src\world.cpp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="..\data\fragment.glsl" />
+    <None Include="data\shaders\fragment.glsl" />
-    <None Include="..\data\vertex.glsl" />
+    <None Include="data\shaders\vertex.glsl" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

ugine3d.vcxproj.filters

@@ -0,0 +1,134 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+    <Filter Include="glfw">
+      <UniqueIdentifier>{422e20da-2cf0-4bda-9833-a89b7ab453a1}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="glew">
+      <UniqueIdentifier>{296e1ba9-28bc-4e0b-8d4e-413551edca96}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="stb">
+      <UniqueIdentifier>{e3c5a7f2-1d4b-4a9c-8f2e-9b5c8d7a6e4f}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Shaders">
+      <UniqueIdentifier>{0628083b-a31c-4825-822c-11b6f933e7bd}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="lib\glfw\glfw3.h">
+      <Filter>glfw</Filter>
+    </ClInclude>
+    <ClInclude Include="lib\glfw\glfw3native.h">
+      <Filter>glfw</Filter>
+    </ClInclude>
+    <ClInclude Include="lib\glew\GL\glew.h">
+      <Filter>glew</Filter>
+    </ClInclude>
+    <ClInclude Include="lib\stb\stb_image.h">
+      <Filter>stb</Filter>
+    </ClInclude>
+    <ClInclude Include="src\vertex.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\shader.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\buffer.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\state.h">
+      <Filter>Source Files</Filter>
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+    <ClInclude Include="src\mesh.h">
+      <Filter>Source Files</Filter>
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+    <ClInclude Include="src\entity.h">
+      <Filter>Source Files</Filter>
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+    <ClInclude Include="src\model.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\camera.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\world.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\engine.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\logger.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\material.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\texture.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="src\main.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="lib\glew\glew.c">
+      <Filter>glew</Filter>
+    </ClCompile>
+    <ClCompile Include="src\vertex.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\shader.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\buffer.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\mesh.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\entity.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\model.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\camera.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\world.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\engine.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\logger.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\material.cpp">
+      <Filter>Source Files</Filter>
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+    <ClCompile Include="src\texture.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="data\shaders\fragment.glsl">
+      <Filter>Shaders</Filter>
+    </None>
+    <None Include="data\shaders\vertex.glsl">
+      <Filter>Shaders</Filter>
+    </None>
+  </ItemGroup>
+</Project>

ugine3d.vcxproj.user

@@ -1,19 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <LocalDebuggerWorkingDirectory>..</LocalDebuggerWorkingDirectory>
+    <LocalDebuggerWorkingDirectory>$(ProjectDir)</LocalDebuggerWorkingDirectory>
     <DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <LocalDebuggerWorkingDirectory>..</LocalDebuggerWorkingDirectory>
+    <LocalDebuggerWorkingDirectory>$(ProjectDir)</LocalDebuggerWorkingDirectory>
     <DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <LocalDebuggerWorkingDirectory>..</LocalDebuggerWorkingDirectory>
+    <LocalDebuggerWorkingDirectory>$(ProjectDir)</LocalDebuggerWorkingDirectory>
     <DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <LocalDebuggerWorkingDirectory>..</LocalDebuggerWorkingDirectory>
+    <LocalDebuggerWorkingDirectory>$(ProjectDir)</LocalDebuggerWorkingDirectory>
     <DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
   </PropertyGroup>
 </Project>