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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, "Depth testing.", 0, 0);
if (!window) {
fprintf(stderr, "[ERROR] Failed to create window.\n");
glfwTerminate();
return(1);
}
glfwMakeContextCurrent(window);
if (glewInit() != GLEW_OK) {
fprintf(stderr, "[ERROR] Failed to initialize glew.\n");
glfwTerminate();
return(1);
}
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
U32 shader = create_shader_program("shaders/depth.vert", "shaders/depth.frag");
U32 marble_texture = load_texture("../../data/textures/marble.jpg");
U32 metal_texture = load_texture("../../data/textures/metal.png");
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 cube_positions[] = {
transform_default(),
transform_make_translate(v3f(a, 0.0f, -4*a))
};
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 VAO, VBO;
glGenVertexArrays(1, &VAO);
glBindVertexArray(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);
state.camera = (Camera) {
v3f(0.0f, 0.0f, 3.0f),
90.0f, 0.1f, 100.0f,
0.0f, 0.0f
};
F32 target_fps = 60.0f;
F32 target_spf = 1.0f/target_fps;
F32 last_time = glfwGetTime();
while (!glfwWindowShouldClose(window)) {
glfwPollEvents();
process_glfw_keyboard(window, &input);
glfwGetFramebufferSize(window, &width, &height);
/* INFO(pryazha): Update */
V3F target = v3f_zero();
if (key_first_press(input.exit))
glfwSetWindowShouldClose(window, GLFW_TRUE);
V3F dv = get_dv_camera_orbital(&input, state.camera.pos,
target, state.dt, 3.0f);
state.camera.pos = v3f_add(state.camera.pos, dv);
input_update_last_state(&input);
/* INFO(pryazha): Render */
MAT4 model, view, proj;
view = look_at(state.camera.pos, target, v3f(0.0f, 1.0f, 0.0f));
/* proj = ortho(-5.0f, 5.0f, -5.0f, 5.0f, 0.1f, 100.0f); */
proj = perspective(state.camera.fovx, (F32)width/(F32)height,
state.camera.near, state.camera.far);
glViewport(0, 0, width, height);
glClearColor(0.15f, 0.15f, 0.15f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(shader);
shader_set_mat4fv(shader, "view", view);
shader_set_mat4fv(shader, "proj", proj);
glBindTexture(GL_TEXTURE_2D, marble_texture);
glBindVertexArray(VAO);
for (S32 i = 0; i < (S32)ArrayCount(cube_positions); ++i) {
model = transform_apply(cube_positions[i]);
shader_set_mat4fv(shader, "model", model);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glBindTexture(GL_TEXTURE_2D, metal_texture);
model = transform_apply(platform_transform);
shader_set_mat4fv(shader, "model", model);
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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