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#include "GL/glew.h"
#include "GLFW/glfw3.h"
#include "pwyazh.h"
#include "pwyazh_GL.h"
#include "common.h"
int main(void)
{
GLFWwindow *window;
State state;
S32 width, height;
Input input;
if (glfwInit() == GLFW_FALSE) {
fprintf(stderr, "[ERROR] Failed to initialize glfw.\n");
return(1);
}
width = 1024;
height = 768;
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);
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);
}
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