feat: add imgui library & primitive shapes

.gitmodules

@@ -10,3 +10,6 @@
 [submodule "lib/glad"]
 	path = lib/glad
 	url = https://github.com/DawidLokiec/glad.git
+[submodule "lib/imgui"]
+	path = lib/imgui
+	url = https://github.com/ocornut/imgui.git

res/render/primitives/cube.frag

@@ -0,0 +1,31 @@
+#version 330 core
+out vec4 FragColor;
+
+struct Material
+{
+  sampler2D diffuse;
+  vec3 specular;
+  float shininess;
+};
+struct Light
+{
+  vec3 position;
+
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+};
+
+in vec3 FragPos;
+in vec3 Normal;
+in vec2 TexCoords;
+
+uniform vec3 viewPos;
+uniform Material material;
+uniform Light light;
+
+void main()
+{
+  vec4 texColor = texture(material.diffuse , TexCoords);
+  FragColor = texColor;
+}

res/render/primitives/cube.hpp

@@ -0,0 +1,60 @@
+#include "GLFW/glfw3.h"
+
+  // Positions           // Normales           // texture coordinate
+constexpr GLfloat VERTICE[] = {
+  // front side
+  -0.5f, -0.5f, 0.5f,    0.0f, 0.0f, 1.0f,     0.0f, 0.0f,
+   0.5f, -0.5f, 0.5f,    0.0f, 0.0f, 1.0f,     1.0f, 0.0f,
+   0.5f,  0.5f, 0.5f,    0.0f, 0.0f, 1.0f,     1.0f, 1.0f,
+  -0.5f,  0.5f, 0.5f,    0.0f, 0.0f, 1.0f,     0.0f, 1.0f,
+
+  // back side 
+  -0.5f, -0.5f, -0.5f,   0.0f, 0.0f, -1.0f,    1.0f, 0.0f,
+   0.5f, -0.5f, -0.5f,   0.0f, 0.0f, -1.0f,    0.0f, 0.0f,
+   0.5f,  0.5f, -0.5f,   0.0f, 0.0f, -1.0f,    0.0f, 1.0f,
+  -0.5f,  0.5f, -0.5f,   0.0f, 0.0f, -1.0f,    1.0f, 1.0f,
+
+  // left side
+  -0.5f, -0.5f, -0.5f,   -1.0f, 0.0f, 0.0f,    0.0f, 0.0f,
+  -0.5f, -0.5f,  0.5f,   -1.0f, 0.0f, 0.0f,    1.0f, 0.0f,
+  -0.5f,  0.5f,  0.5f,   -1.0f, 0.0f, 0.0f,    1.0f, 1.0f,
+  -0.5f,  0.5f, -0.5f,   -1.0f, 0.0f, 0.0f,    0.0f, 1.0f,
+
+  // right side
+  0.5f, -0.5f, -0.5f,    1.0f, 0.0f, 0.0f,     1.0f, 0.0f,
+  0.5f, -0.5f,  0.5f,    1.0f, 0.0f, 0.0f,     0.0f, 0.0f,
+  0.5f,  0.5f,  0.5f,    1.0f, 0.0f, 0.0f,     0.0f, 1.0f,
+  0.5f,  0.5f, -0.5f,    1.0f, 0.0f, 0.0f,     1.0f, 1.0f,
+
+  // bottom side
+  -0.5f, -0.5f, -0.5f,   0.0f, -1.0f, 0.0f,    0.0f, 1.0f,
+   0.5f, -0.5f, -0.5f,   0.0f, -1.0f, 0.0f,    1.0f, 1.0f, 
+   0.5f, -0.5f,  0.5f,   0.0f, -1.0f, 0.0f,    1.0f, 0.0f,
+  -0.5f, -0.5f,  0.5f,   0.0f, -1.0f, 0.0f,    0.0f, 0.0f,
+
+  // up side
+  -0.5f,  0.5f, -0.5f,   0.0f, 1.0f, 0.0f,     0.0f, 1.0f,
+   0.5f,  0.5f, -0.5f,   0.0f, 1.0f, 0.0f,     1.0f, 1.0f,
+   0.5f,  0.5f,  0.5f,   0.0f, 1.0f, 0.0f,     1.0f, 0.0f,
+  -0.5f,  0.5f,  0.5f,   0.0f, 1.0f, 0.0f,     0.0f, 0.0f,
+};
+
+constexpr unsigned int INDICE[] = {
+  0, 1, 2,      // 1
+  2, 3, 0,      // 2
+
+  4, 5, 6,      // 3
+  6, 7, 4,      // 4
+
+  8, 9, 10,     // 5
+  10, 11, 8,    // 6
+
+  12, 13, 14,   // 7
+  14, 15, 12,   // 8
+
+  16, 17, 18,   // 9
+  18, 19, 16,   // 10
+
+  20, 21, 22,   // 11
+  22, 23, 20    // 12
+};  

res/render/primitives/cube.vert

@@ -0,0 +1,22 @@
+#version 330 core
+
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTexCoords;
+
+uniform mat4 projection;
+uniform mat4 model;
+uniform mat4 view;
+
+out vec3 Normal;
+out vec3 FragPos;
+out vec2 TexCoords;
+
+void main()
+{
+  FragPos = vec3(model*vec4(aPos , 1.0));
+  gl_Position = projection*view*vec4(FragPos , 1.0);
+
+  Normal = mat3(transpose(inverse(model)))*aNormal;
+  TexCoords = aTexCoords;
+}