quite a lot of changes that I, of course, are not going to describe;)

8 files changed, 301 insertions, 396 deletions

diff --git a/advanced_opengl/7.uniform_buffer/shaders/color_cube.fs b/advanced_opengl/7.uniform_buffer/shaders/color_cube.frag
index fbbafbf..d40d866 100644
--- a/advanced_opengl/7.uniform_buffer/shaders/color_cube.fs
+++ b/advanced_opengl/7.uniform_buffer/shaders/color_cube.frag
@@ -2,8 +2,7 @@
 
 out vec4 frag_color;
 
-void
-main(void)
+void main(void)
 {
     frag_color = vec4(1.0, 0.0, 0.0, 1.0);
 }
diff --git a/advanced_opengl/7.uniform_buffer/shaders/color_cube.vs b/advanced_opengl/7.uniform_buffer/shaders/color_cube.vert
index 17a3448..67226f8 100644
--- a/advanced_opengl/7.uniform_buffer/shaders/color_cube.vs
+++ b/advanced_opengl/7.uniform_buffer/shaders/color_cube.vert
@@ -3,14 +3,13 @@ layout(location = 0) in vec3 apos;
 
 layout(std140) uniform Matrices
 {
-    mat4 projection;
+    mat4 proj;
     mat4 view;
 };
 
 uniform mat4 model;
 
-void
-main(void)
+void main(void)
 {
-    gl_Position = projection*view*model*vec4(apos, 1.0);
+    gl_Position = proj*view*model*vec4(apos, 1.0);
 }
diff --git a/advanced_opengl/7.uniform_buffer/shaders/cube.fs b/advanced_opengl/7.uniform_buffer/shaders/cube.frag
index f58c5d3..71892a7 100644
--- a/advanced_opengl/7.uniform_buffer/shaders/cube.fs
+++ b/advanced_opengl/7.uniform_buffer/shaders/cube.frag
@@ -6,8 +6,7 @@ in vec2 tex_coords;
 
 uniform sampler2D texture1;
 
-void
-main(void)
+void main(void)
 {
     frag_color = texture(texture1, tex_coords);
 }
diff --git a/advanced_opengl/7.uniform_buffer/shaders/cube.vs b/advanced_opengl/7.uniform_buffer/shaders/cube.vert
index 054164d..ec90f37 100644
--- a/advanced_opengl/7.uniform_buffer/shaders/cube.vs
+++ b/advanced_opengl/7.uniform_buffer/shaders/cube.vert
@@ -5,7 +5,7 @@ layout(location = 1) in vec2 atex_coords;
 
 layout(std140) uniform Matrices
 {
-    uniform mat4 projection;
+    uniform mat4 proj;
     uniform mat4 view;
 };
 
@@ -13,9 +13,8 @@ uniform mat4 model;
 
 out vec2 tex_coords;
 
-void
-main(void)
+void main(void)
 {
-    gl_Position = projection*view*model*vec4(apos, 1.0);
+    gl_Position = proj*view*model*vec4(apos, 1.0);
     tex_coords = atex_coords;
 }
diff --git a/advanced_opengl/7.uniform_buffer/shaders/skybox.fs b/advanced_opengl/7.uniform_buffer/shaders/skybox.frag
index bf69c8b..22be301 100644
--- a/advanced_opengl/7.uniform_buffer/shaders/skybox.fs
+++ b/advanced_opengl/7.uniform_buffer/shaders/skybox.frag
@@ -6,8 +6,7 @@ out vec4 frag_color;
 
 uniform samplerCube skybox;
 
-void
-main(void)
+void main(void)
 {
     frag_color = texture(skybox, tex_coords);
 }
diff --git a/advanced_opengl/7.uniform_buffer/shaders/skybox.vs b/advanced_opengl/7.uniform_buffer/shaders/skybox.vert
index 03b2171..ddbeb21 100644
--- a/advanced_opengl/7.uniform_buffer/shaders/skybox.vs
+++ b/advanced_opengl/7.uniform_buffer/shaders/skybox.vert
@@ -6,14 +6,13 @@ out vec3 tex_coords;
 
 layout(std140) uniform Matrices
 {
-    uniform mat4 projection;
+    uniform mat4 proj;
     uniform mat4 view;
 };
 
-void
-main(void)
+void main(void)
 {
     tex_coords = apos;
-    vec4 pos = projection*view*vec4(apos, 1.0);
+    vec4 pos = proj*view*vec4(apos, 1.0);
     gl_Position = pos.xyww;
 }
diff --git a/advanced_opengl/7.uniform_buffer/uniform_buffer b/advanced_opengl/7.uniform_buffer/uniform_buffer
index 57aa64d..154fb08 100755
--- a/advanced_opengl/7.uniform_buffer/uniform_buffer
+++ b/advanced_opengl/7.uniform_buffer/uniform_buffer
diff --git a/advanced_opengl/7.uniform_buffer/uniform_buffer.c b/advanced_opengl/7.uniform_buffer/uniform_buffer.c
index e67b5c9..a27c115 100644
--- a/advanced_opengl/7.uniform_buffer/uniform_buffer.c
+++ b/advanced_opengl/7.uniform_buffer/uniform_buffer.c
@@ -2,391 +2,302 @@
 #include "GLFW/glfw3.h"
 
 #include "pwyazh.h"
-
 #include "pwyazh_GL.h"
 
 #include "common.h"
 
-#include <unistd.h>
+int main(void)
+{
+	GLFWwindow *window;
+	State state;
+	S32 width, height;
+	Input input;
 
-#define WIDTH 1024
-#define HEIGHT 768
+	if (glfwInit() == GLFW_FALSE) {
+		fprintf(stderr, "[ERROR] Failed to initialize glfw.\n");
+		return(1);
+	}
 
-static V3F camera_pos;
-static F32 dt;
-static Input input;
-static B32 first_mouse = 1;
+	width = 1024;
+	height = 768;
 
-void
-key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
-{
-    switch (action)
-    {
-        case GLFW_PRESS: {
-            switch (key)
-            {
-                case GLFW_KEY_D: {
-                    input.move_right.state = KeyState_PRESS;
-                } break;
-                case GLFW_KEY_W: {
-                    input.move_forward.state = KeyState_PRESS;
-                } break;
-                case GLFW_KEY_A: {
-                    input.move_left.state = KeyState_PRESS;
-                } break;
-                case GLFW_KEY_S: {
-                    input.move_backward.state = KeyState_PRESS;
-                } break;
-                case GLFW_KEY_E: {
-                    input.move_up.state = KeyState_PRESS;
-                } break;
-                case GLFW_KEY_Q: {
-                    input.move_down.state = KeyState_PRESS;
-                } break;
-            }
-        } break;
-        
-        case GLFW_RELEASE: {
-            switch (key)
-            {
-                case GLFW_KEY_D: {
-                    input.move_right.state = KeyState_RELEASE;
-                } break;
-                case GLFW_KEY_W: {
-                    input.move_forward.state = KeyState_RELEASE;
-                } break;
-                case GLFW_KEY_A: {
-                    input.move_left.state = KeyState_RELEASE;
-                } break;
-                case GLFW_KEY_S: {
-                    input.move_backward.state = KeyState_RELEASE;
-                } break;
-                case GLFW_KEY_E: {
-                    input.move_up.state = KeyState_RELEASE;
-                } break;
-                case GLFW_KEY_Q: {
-                    input.move_down.state = KeyState_RELEASE;
-                } break;
-            }
-        } break;
-    }
-}
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	window = glfwCreateWindow(width, height, "Advanced data (uniform buffer)", 0, 0);
+	if (!window) {
+		fprintf(stderr, "[ERROR] Failed to create window.\n");
+		glfwTerminate();
+		return(1);
+	}
 
-void
-cursor_pos_callback(GLFWwindow* window, double xpos, double ypos)
-{
-    if (first_mouse)
-    {
-        input.last_mouse_pos = v2f(xpos, ypos);
-        first_mouse = 0;
-    }
-    input.mouse_offset = v2f(input.mouse_offset.x+((F32)xpos-input.last_mouse_pos.x),
-                             input.mouse_offset.y+((F32)ypos-input.last_mouse_pos.y));
-    input.last_mouse_pos = v2f((F32)xpos, (F32)ypos);
-}
+	glfwMakeContextCurrent(window);
 
-int
-main(void)
-{
-    GLFWwindow *window;
-    
-    if (glfwInit() == GLFW_FALSE)
-    {
-        fprintf(stderr, "[ERROR] Failed to initialize glfw.\n");
-        return(1);
-    }
-    
-    glfwWindowHint(GLFW_RESIZABLE, 0);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-    window = glfwCreateWindow(WIDTH, HEIGHT, "Advanced data (uniform buffer)", 0, 0);
-    if (!window)
-    {
-        fprintf(stderr, "[ERROR] Failed to create window.\n");
-        glfwTerminate();
-        return(1);
-    }
-    
-    glfwMakeContextCurrent(window);
-    
-    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
-    
-    glfwSetKeyCallback(window, key_callback);
-    glfwSetCursorPosCallback(window, cursor_pos_callback);
-    
-    if (glewInit() != GLEW_OK)
-    {
-        fprintf(stderr, "[ERROR] Failed to initialize glew.\n");
-        glfwTerminate();
-        return(1);
-    }
-    
-    U32 skybox_shader = create_shader_program("shaders/skybox.vs", "shaders/skybox.fs");
-    U32 cube_shader = create_shader_program("shaders/cube.vs", "shaders/cube.fs");
-    U32 color_cube_shader = create_shader_program("shaders/color_cube.vs",
-                                                  "shaders/color_cube.fs");
-    
-    U32 skybox_matrices = glGetUniformBlockIndex(skybox_shader, "Matrices");
-    U32 cube_matrices = glGetUniformBlockIndex(cube_shader, "Matrices");
-    U32 color_cube_matrices = glGetUniformBlockIndex(color_cube_shader, "Matrices");
-    
-    glUniformBlockBinding(skybox_shader, skybox_matrices, 0);
-    glUniformBlockBinding(cube_shader, cube_matrices, 0);
-    glUniformBlockBinding(color_cube_shader, color_cube_matrices, 0);
-    
-    U32 matrices_ubo;
-    glGenBuffers(1, &matrices_ubo);
-    glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
-    glBufferData(GL_UNIFORM_BUFFER, 2*sizeof(MAT4), 0, GL_STATIC_DRAW);
-    glBindBuffer(GL_UNIFORM_BUFFER, 0);
-    glBindBufferRange(GL_UNIFORM_BUFFER, 0, matrices_ubo, 0, 2*sizeof(MAT4));
-    
-    U32 grid_texture = load_texture("../../data/textures/grid.png");
-    
-    const char *cube_texture_filenames[6] = {
-        "../../data/textures/skybox/right.jpg",
-        "../../data/textures/skybox/left.jpg",
-        "../../data/textures/skybox/top.jpg",
-        "../../data/textures/skybox/bottom.jpg",
-        "../../data/textures/skybox/front.jpg",
-        "../../data/textures/skybox/back.jpg"
-    };
-    U32 skybox_texture = load_cubemap(cube_texture_filenames);
-    
-    F32 a = 0.5f;
-    F32 vertices[] = {
-        -a, -a, -a,  0.0f, 0.0f,
-        a, -a, -a,  1.0f, 0.0f,
-        a,  a, -a,  1.0f, 1.0f,
-        a,  a, -a,  1.0f, 1.0f,
-        -a,  a, -a,  0.0f, 1.0f,
-        -a, -a, -a,  0.0f, 0.0f,
-        
-        -a, -a,  a,  0.0f, 0.0f,
-        a, -a,  a,  1.0f, 0.0f,
-        a,  a,  a,  1.0f, 1.0f,
-        a,  a,  a,  1.0f, 1.0f,
-        -a,  a,  a,  0.0f, 1.0f,
-        -a, -a,  a,  0.0f, 0.0f,
-        
-        -a,  a,  a,  1.0f, 0.0f,
-        -a,  a, -a,  1.0f, 1.0f,
-        -a, -a, -a,  0.0f, 1.0f,
-        -a, -a, -a,  0.0f, 1.0f,
-        -a, -a,  a,  0.0f, 0.0f,
-        -a,  a,  a,  1.0f, 0.0f,
-        
-        a,  a,  a,  1.0f, 0.0f,
-        a,  a, -a,  1.0f, 1.0f,
-        a, -a, -a,  0.0f, 1.0f,
-        a, -a, -a,  0.0f, 1.0f,
-        a, -a,  a,  0.0f, 0.0f,
-        a,  a,  a,  1.0f, 0.0f,
-        
-        -a, -a, -a,  0.0f, 1.0f,
-        a, -a, -a,  1.0f, 1.0f,
-        a, -a,  a,  1.0f, 0.0f,
-        a, -a,  a,  1.0f, 0.0f,
-        -a, -a,  a,  0.0f, 0.0f,
-        -a, -a, -a,  0.0f, 1.0f,
-        
-        -a,  a, -a,  0.0f, 1.0f,
-        a,  a, -a,  1.0f, 1.0f,
-        a,  a,  a,  1.0f, 0.0f,
-        a,  a,  a,  1.0f, 0.0f,
-        -a,  a,  a,  0.0f, 0.0f,
-        -a,  a, -a,  0.0f, 1.0f
-    };
-    
-    Transform platform_position =
-        transform_make_scale_translate(v3f(10.0f, 0.2f, 10.0f),
-                                       v3f(0.0f, -(a+(a*0.2f)+0.01f), 0.0f));
-    
-    U32 cube_vao, vbo;
-    glGenVertexArrays(1, &cube_vao);
-    glBindVertexArray(cube_vao);
-    glGenBuffers(1, &vbo);
-    glBindBuffer(GL_ARRAY_BUFFER, vbo);
-    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-    glEnableVertexAttribArray(0);
-    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(F32), (void *)0);
-    glEnableVertexAttribArray(1);
-    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(F32), (void *)(3*sizeof(F32)));
-    glBindVertexArray(0);
-    
-    a = 1.0f;
-    F32 skybox_cube_vertices[] = {
-        -a, -a, -a,
-        a, -a, -a,
-        a,  a, -a,
-        a,  a, -a,
-        -a,  a, -a,
-        -a, -a, -a,
-        
-        -a, -a,  a,
-        a, -a,  a,
-        a,  a,  a,
-        a,  a,  a,
-        -a,  a,  a,
-        -a, -a,  a,
-        
-        -a,  a,  a,
-        -a,  a, -a,
-        -a, -a, -a,
-        -a, -a, -a,
-        -a, -a,  a,
-        -a,  a,  a,
-        
-        a,  a,  a,
-        a,  a, -a,
-        a, -a, -a,
-        a, -a, -a,
-        a, -a,  a,
-        a,  a,  a,
-        
-        -a, -a, -a,
-        a, -a, -a,
-        a, -a,  a,
-        a, -a,  a,
-        -a, -a,  a,
-        -a, -a, -a,
-        
-        -a,  a, -a,
-        a,  a, -a,
-        a,  a,  a,
-        a,  a,  a,
-        -a,  a,  a,
-        -a,  a, -a,
-    };
-    
-    U32 skybox_cube_vao;
-    glGenVertexArrays(1, &skybox_cube_vao);
-    glBindVertexArray(skybox_cube_vao);
-    glGenBuffers(1, &vbo);
-    glBindBuffer(GL_ARRAY_BUFFER, vbo);
-    glBufferData(GL_ARRAY_BUFFER, sizeof(skybox_cube_vertices), skybox_cube_vertices, GL_STATIC_DRAW);
-    glEnableVertexAttribArray(0);
-    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(F32), (void *)0);
-    glBindVertexArray(0);
-    
-    F32 target_fps = 60.0f;
-    F32 target_spf = 1.0f/target_fps;
-    camera_pos = v3f(0.0f, 1.0f, 3.0f);
-    F32 yaw = 0.0f, pitch = 0.0f;
-    
-    F32 last_time = glfwGetTime();
-    
-    glEnable(GL_DEPTH_TEST);
-    glDepthFunc(GL_LEQUAL);
-    
-    MAT4 view, projection;
-    projection = perspective(90.0f, (F32)WIDTH/(F32)HEIGHT, 0.1f, 100.0f);
-    glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
-    glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(MAT4), (const void *)&projection);
-    glBindBuffer(GL_UNIFORM_BUFFER, 0);
-    view = mat4_make_translate(v3f_negate(camera_pos));
-    view = mat4_rotate_angles(view, v3f(pitch, yaw, 0.0f));
-    
-    while (!glfwWindowShouldClose(window))
-    {
-        glfwPollEvents();
-        
-        /* INFO(pryazha): update */
-        
-        V3F left, up, forward;
-        
-        left = v3f(-view.m0.x, -view.m1.x, -view.m2.x);
-        up = v3f(view.m0.y, view.m1.y, view.m2.y);
-        forward = v3f(-view.m0.z, -view.m1.z, -view.m2.z);
-        
-        V3F dp = v3f_zero();
-        F32 speed = 2.0f;
-        if (key_is_pressed(input.move_right))
-            dp = v3f_add(dp, v3f_scalef(left, -speed*dt));
-        if (key_is_pressed(input.move_forward))
-            dp = v3f_add(dp, v3f_scalef(forward, speed*dt));
-        if (key_is_pressed(input.move_left))
-            dp = v3f_add(dp, v3f_scalef(left, speed*dt));
-        if (key_is_pressed(input.move_backward))
-            dp = v3f_add(dp, v3f_scalef(forward, -speed*dt));
-        if (key_is_pressed(input.move_up))
-            dp = v3f_add(dp, v3f_scalef(up, speed*dt));
-        if (key_is_pressed(input.move_down))
-            dp = v3f_add(dp, v3f_scalef(up, -speed*dt));
-        input_update_last_state(&input);
-        camera_pos = v3f_add(camera_pos, dp);
-        
-        /* NOTE(pryazha): Mouse handling */
-        F32 sensitivity = 0.1f;
-        input.mouse_offset = v2f_scalef(input.mouse_offset, sensitivity);
-        yaw += input.mouse_offset.x;
-        pitch += input.mouse_offset.y;
-        if (pitch > 89.0f)
-            pitch = 89.0f;
-        if (pitch < -89.0f)
-            pitch = -89.0f;
-        input.mouse_offset = v2f_zero();
-        
-        view = mat4_make_translate(v3f_negate(camera_pos));
-        view = mat4_rotate_angles(view, v3f(pitch, yaw, 0.0f));
-        glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
-        glBufferSubData(GL_UNIFORM_BUFFER, sizeof(MAT4), sizeof(MAT4), (const void *)&view);
-        glBindBuffer(GL_UNIFORM_BUFFER, 0);
-        
-        /* NOTE(pryazha): Render */
-        glClearColor(0.15f, 0.15f, 0.15f, 1.0f);
-        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-        
-        glUseProgram(cube_shader);
-        shader_set_mat4fv(cube_shader, "model", mat4_make_translate(v3f(-2.0f, 0.0f, 0.0f)));
-        glBindTexture(GL_TEXTURE_2D, grid_texture);
-        glBindVertexArray(cube_vao);
-        glDrawArrays(GL_TRIANGLES, 0, 36);
-        glBindTexture(GL_TEXTURE_2D, 0);
-        glBindVertexArray(0);
-        
-        glUseProgram(cube_shader);
-        shader_set_mat4fv(cube_shader, "model", transform_apply(platform_position));
-        glBindTexture(GL_TEXTURE_2D, grid_texture);
-        glBindVertexArray(cube_vao);
-        glDrawArrays(GL_TRIANGLES, 0, 36);
-        glBindTexture(GL_TEXTURE_2D, 0);
-        glBindVertexArray(0);
-        
-        glUseProgram(color_cube_shader);
-        shader_set_mat4fv(cube_shader, "model", mat4_make_translate(v3f(2.0f, 0.0f, 0.0f)));
-        glBindVertexArray(cube_vao);
-        glDrawArrays(GL_TRIANGLES, 0, 36);
-        glBindVertexArray(0);
-        
-        glUseProgram(skybox_shader);
-        MAT4 rotate_view = mat4_identity();
-        rotate_view.m0 = v4f(view.m0.x, view.m0.y, view.m0.z, 0.0f);
-        rotate_view.m1 = v4f(view.m1.x, view.m1.y, view.m1.z, 0.0f);
-        rotate_view.m2 = v4f(view.m2.x, view.m2.y, view.m2.z, 0.0f);
-        glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
-        glBufferSubData(GL_UNIFORM_BUFFER, sizeof(MAT4), sizeof(MAT4), (const void *)&rotate_view);
-        glBindBuffer(GL_UNIFORM_BUFFER, 0);
-        glBindVertexArray(skybox_cube_vao);
-        glBindTexture(GL_TEXTURE_CUBE_MAP, skybox_texture);
-        glDrawArrays(GL_TRIANGLES, 0, 36);
-        glBindVertexArray(0);
-        
-        glfwSwapBuffers(window);
-        
-        F32 elapsed = glfwGetTime()-last_time;
-        if (elapsed < target_spf)
-        {
-            U32 sleep_time = (U32)(target_spf-elapsed);
-            if (sleep_time > 0)
-                sleep(sleep_time);
-        }
-        F32 current_time = glfwGetTime();
-        dt = current_time-last_time;
-        last_time = current_time;
-    }
-    
-    glfwTerminate();
-    return(0);
+	glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+	if (glewInit() != GLEW_OK) {
+		fprintf(stderr, "[ERROR] Failed to initialize glew.\n");
+		glfwTerminate();
+		return(1);
+	}
+
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LEQUAL);
+
+	U32 skybox_shader = create_shader_program("shaders/skybox.vert", "shaders/skybox.frag");
+	U32 cube_shader = create_shader_program("shaders/cube.vert", "shaders/cube.frag");
+	U32 color_cube_shader = create_shader_program("shaders/color_cube.vert", "shaders/color_cube.frag");
+
+	U32 skybox_matrices = glGetUniformBlockIndex(skybox_shader, "Matrices");
+	U32 cube_matrices = glGetUniformBlockIndex(cube_shader, "Matrices");
+	U32 color_cube_matrices = glGetUniformBlockIndex(color_cube_shader, "Matrices");
+
+	glUniformBlockBinding(skybox_shader, skybox_matrices, 0);
+	glUniformBlockBinding(cube_shader, cube_matrices, 0);
+	glUniformBlockBinding(color_cube_shader, color_cube_matrices, 0);
+
+	U32 matrices_ubo;
+	glGenBuffers(1, &matrices_ubo);
+	glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
+	glBufferData(GL_UNIFORM_BUFFER, 2*sizeof(MAT4), 0, GL_STATIC_DRAW);
+	glBindBuffer(GL_UNIFORM_BUFFER, 0);
+	glBindBufferRange(GL_UNIFORM_BUFFER, 0, matrices_ubo, 0, 2*sizeof(MAT4));
+
+	U32 grid_texture = load_texture("../../data/textures/grid.png");
+
+	const char *cube_texture_filenames[6] = {
+		"../../data/textures/skybox/right.jpg",
+		"../../data/textures/skybox/left.jpg",
+		"../../data/textures/skybox/top.jpg",
+		"../../data/textures/skybox/bottom.jpg",
+		"../../data/textures/skybox/front.jpg",
+		"../../data/textures/skybox/back.jpg"
+	};
+
+	U32 skybox_texture = load_cubemap(cube_texture_filenames);
+
+	F32 a = 0.5f;
+	F32 vertices[] = {
+		-a, -a, -a,  0.0f, 0.0f,
+		 a, -a, -a,  1.0f, 0.0f,
+		 a,  a, -a,  1.0f, 1.0f,
+		 a,  a, -a,  1.0f, 1.0f,
+		-a,  a, -a,  0.0f, 1.0f,
+		-a, -a, -a,  0.0f, 0.0f,
+
+		-a, -a,  a,  0.0f, 0.0f,
+		 a, -a,  a,  1.0f, 0.0f,
+		 a,  a,  a,  1.0f, 1.0f,
+		 a,  a,  a,  1.0f, 1.0f,
+		-a,  a,  a,  0.0f, 1.0f,
+		-a, -a,  a,  0.0f, 0.0f,
+
+		-a,  a,  a,  1.0f, 0.0f,
+		-a,  a, -a,  1.0f, 1.0f,
+		-a, -a, -a,  0.0f, 1.0f,
+		-a, -a, -a,  0.0f, 1.0f,
+		-a, -a,  a,  0.0f, 0.0f,
+		-a,  a,  a,  1.0f, 0.0f,
+
+		 a,  a,  a,  1.0f, 0.0f,
+		 a,  a, -a,  1.0f, 1.0f,
+		 a, -a, -a,  0.0f, 1.0f,
+		 a, -a, -a,  0.0f, 1.0f,
+		 a, -a,  a,  0.0f, 0.0f,
+		 a,  a,  a,  1.0f, 0.0f,
+
+		-a, -a, -a,  0.0f, 1.0f,
+		 a, -a, -a,  1.0f, 1.0f,
+		 a, -a,  a,  1.0f, 0.0f,
+		 a, -a,  a,  1.0f, 0.0f,
+		-a, -a,  a,  0.0f, 0.0f,
+		-a, -a, -a,  0.0f, 1.0f,
+
+		-a,  a, -a,  0.0f, 1.0f,
+		 a,  a, -a,  1.0f, 1.0f,
+		 a,  a,  a,  1.0f, 0.0f,
+		 a,  a,  a,  1.0f, 0.0f,
+		-a,  a,  a,  0.0f, 0.0f,
+		-a,  a, -a,  0.0f, 1.0f
+	};
+
+	V3F platform_pos = v3f(10.0f, 0.2f, 10.0f);
+	V3F platform_scale = v3f(0.0f, -(a+(a*0.2f)+0.01f), 0.0f);
+	Transform platform_transform = transform_make_scale_translate(platform_pos, platform_scale);
+
+	U32 cube_vao, vbo;
+	glGenVertexArrays(1, &cube_vao);
+	glBindVertexArray(cube_vao);
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(F32), (void *)0);
+	glEnableVertexAttribArray(1);
+	glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(F32), (void *)(3*sizeof(F32)));
+	glBindVertexArray(0);
+
+	a = 1.0f;
+	F32 skybox_cube_vertices[] = {
+		-a, -a, -a,
+		 a, -a, -a,
+		 a,  a, -a,
+		 a,  a, -a,
+		-a,  a, -a,
+		-a, -a, -a,
+
+		-a, -a,  a,
+		 a, -a,  a,
+		 a,  a,  a,
+		 a,  a,  a,
+		-a,  a,  a,
+		-a, -a,  a,
+
+		-a,  a,  a,
+		-a,  a, -a,
+		-a, -a, -a,
+		-a, -a, -a,
+		-a, -a,  a,
+		-a,  a,  a,
+
+		 a,  a,  a,
+		 a,  a, -a,
+		 a, -a, -a,
+		 a, -a, -a,
+		 a, -a,  a,
+		 a,  a,  a,
+
+		-a, -a, -a,
+		 a, -a, -a,
+		 a, -a,  a,
+		 a, -a,  a,
+		-a, -a,  a,
+		-a, -a, -a,
+
+		-a,  a, -a,
+		 a,  a, -a,
+		 a,  a,  a,
+		 a,  a,  a,
+		-a,  a,  a,
+		-a,  a, -a,
+	};
+
+	U32 skybox_cube_vao;
+	glGenVertexArrays(1, &skybox_cube_vao);
+	glBindVertexArray(skybox_cube_vao);
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(skybox_cube_vertices), skybox_cube_vertices, GL_STATIC_DRAW);
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(F32), (void *)0);
+	glBindVertexArray(0);
+
+	state.camera = (Camera) {
+		v3f(0.0f, 1.0f, 3.0f), 100.0f,
+		0.1f, 100.0f, 0.0f, 0.0f
+	};
+	input = input_init();
+
+	F32 target_fps = 60.0f;
+	F32 target_spf = 1.0f/target_fps;
+	F32 last_time = glfwGetTime();
+
+	while (!glfwWindowShouldClose(window)) {
+		glfwPollEvents();
+
+		/* INFO(pryazha): Update */
+		glfwGetFramebufferSize(window, &width, &height);
+		process_glfw_keyboard(window, &input);
+		process_glfw_mouse_pos(window, &input);
+
+		if (key_first_press(input.exit))
+			glfwSetWindowShouldClose(window, GLFW_TRUE);
+
+		V3F dv = get_dv_camera_first_person(&input, &state.camera,
+						    4.0f, state.dt);
+		state.camera.pos = v3f_add(state.camera.pos, dv);
+
+		F32 sensitivity = 0.1f;
+		input.mouse_offset = v2f_scalef(input.mouse_offset, sensitivity);
+		state.camera.yaw += input.mouse_offset.x;
+		state.camera.pitch += input.mouse_offset.y;
+		if (state.camera.pitch > 89.0f)
+			state.camera.pitch = 89.0f;
+		if (state.camera.pitch < -89.0f)
+			state.camera.pitch = -89.0f;
+
+		input_update_last_state(&input);
+
+		/* NOTE(pryazha): Render */
+		MAT4 view, proj, model;
+		view = get_view_matrix(&state.camera);
+		proj = perspective(state.camera.fovx, (F32)width/(F32)height,
+				   state.camera.near, state.camera.far);
+
+		glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
+		glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(MAT4),
+			       	(const void *)&proj);
+		glBindBuffer(GL_UNIFORM_BUFFER, 0);
+		glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
+		glBufferSubData(GL_UNIFORM_BUFFER, sizeof(MAT4),
+			       	sizeof(MAT4), (const void *)&view);
+		glBindBuffer(GL_UNIFORM_BUFFER, 0);
+
+		glClearColor(0.15f, 0.15f, 0.15f, 1.0f);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+		glUseProgram(cube_shader);
+		model = mat4_make_translate(v3f(-2.0f, 0.0f, 0.0f));
+		shader_set_mat4fv(cube_shader, "model", model);
+		glBindTexture(GL_TEXTURE_2D, grid_texture);
+		glBindVertexArray(cube_vao);
+		glDrawArrays(GL_TRIANGLES, 0, 36);
+		glBindTexture(GL_TEXTURE_2D, 0);
+		glBindVertexArray(0);
+
+		glUseProgram(cube_shader);
+		model = transform_apply(platform_transform);
+		shader_set_mat4fv(cube_shader, "model", model);
+		glBindTexture(GL_TEXTURE_2D, grid_texture);
+		glBindVertexArray(cube_vao);
+		glDrawArrays(GL_TRIANGLES, 0, 36);
+		glBindTexture(GL_TEXTURE_2D, 0);
+		glBindVertexArray(0);
+
+		glUseProgram(color_cube_shader);
+		model = mat4_make_translate(v3f(2.0f, 0.0f, 0.0f));
+		shader_set_mat4fv(cube_shader, "model", model);
+		glBindVertexArray(cube_vao);
+		glDrawArrays(GL_TRIANGLES, 0, 36);
+		glBindVertexArray(0);
+
+		glUseProgram(skybox_shader);
+		MAT4 rotate_view = mat4_identity();
+		rotate_view.m0 = v4f(view.m0.x, view.m0.y, view.m0.z, 0.0f);
+		rotate_view.m1 = v4f(view.m1.x, view.m1.y, view.m1.z, 0.0f);
+		rotate_view.m2 = v4f(view.m2.x, view.m2.y, view.m2.z, 0.0f);
+		glBindBuffer(GL_UNIFORM_BUFFER, matrices_ubo);
+		glBufferSubData(GL_UNIFORM_BUFFER, sizeof(MAT4), sizeof(MAT4),
+			       	(const void *)&rotate_view);
+		glBindBuffer(GL_UNIFORM_BUFFER, 0);
+		glBindVertexArray(skybox_cube_vao);
+		glBindTexture(GL_TEXTURE_CUBE_MAP, skybox_texture);
+		glDrawArrays(GL_TRIANGLES, 0, 36);
+		glBindVertexArray(0);
+
+		glfwSwapBuffers(window);
+
+		F32 elapsed = glfwGetTime()-last_time;
+		if (elapsed < target_spf) {
+			U32 sleep_time = (U32)(target_spf-elapsed);
+			if (sleep_time > 0)
+				sleep(sleep_time);
+		}
+		F32 current_time = glfwGetTime();
+		state.dt = current_time-last_time;
+		last_time = current_time;
+	}
+
+	glfwTerminate();
+	return(0);
 }