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#include "GL/glew.h"
#include "GLFW/glfw3.h"
#include "pwyazh.h"
#include "pwyazh_GL.h"
#include "common.h"
#include <unistd.h>
static S32 global_width = 1024, global_height = 768;
static Input global_input;
void
key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
switch (action)
{
case GLFW_PRESS: {
switch (key)
{
case GLFW_KEY_D: {
global_input.move_right.state = KeyState_PRESS;
} break;
case GLFW_KEY_W: {
global_input.move_forward.state = KeyState_PRESS;
} break;
case GLFW_KEY_A: {
global_input.move_left.state = KeyState_PRESS;
} break;
case GLFW_KEY_S: {
global_input.move_backward.state = KeyState_PRESS;
} break;
case GLFW_KEY_E: {
global_input.move_up.state = KeyState_PRESS;
} break;
case GLFW_KEY_Q: {
global_input.move_down.state = KeyState_PRESS;
} break;
case GLFW_KEY_SPACE: {
global_input.jump.state = KeyState_PRESS;
} break;
case GLFW_KEY_RIGHT: {
global_input.action_right.state = KeyState_PRESS;
} break;
case GLFW_KEY_LEFT: {
global_input.action_left.state = KeyState_PRESS;
} break;
case GLFW_KEY_ESCAPE: {
global_input.exit.state = KeyState_PRESS;
} break;
}
} break;
case GLFW_RELEASE: {
switch (key)
{
case GLFW_KEY_D: {
global_input.move_right.state = KeyState_RELEASE;
} break;
case GLFW_KEY_W: {
global_input.move_forward.state = KeyState_RELEASE;
} break;
case GLFW_KEY_A: {
global_input.move_left.state = KeyState_RELEASE;
} break;
case GLFW_KEY_S: {
global_input.move_backward.state = KeyState_RELEASE;
} break;
case GLFW_KEY_E: {
global_input.move_up.state = KeyState_RELEASE;
} break;
case GLFW_KEY_Q: {
global_input.move_down.state = KeyState_RELEASE;
} break;
case GLFW_KEY_SPACE: {
global_input.jump.state = KeyState_RELEASE;
} break;
case GLFW_KEY_RIGHT: {
global_input.action_right.state = KeyState_RELEASE;
} break;
case GLFW_KEY_LEFT: {
global_input.action_left.state = KeyState_RELEASE;
} break;
case GLFW_KEY_ESCAPE: {
global_input.exit.state = KeyState_RELEASE;
} break;
}
} break;
}
}
void
window_resize_callback(GLFWwindow* window, int width, int height)
{
global_width = width;
global_height = height;
glViewport(0, 0, global_width, global_height);
}
int
main(void)
{
GLFWwindow *window;
Arena *arena = 0;
F32 target_fps, target_spf,
last_time, dt;
MAT4 projection, view, model;
V3F camera_pos;
F32 camera_speed, fovx, near, far;
U32 color_shader;
if (glfwInit() == GLFW_FALSE)
{
fprintf(stderr, "[ERROR] Failed to initialize glfw.\n");
return(1);
}
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_SAMPLES, 4);
window = glfwCreateWindow(global_width, global_height, "Anti Aliasing (MSAA)", 0, 0);
if (!window)
{
fprintf(stderr, "[ERROR] Failed to create window.\n");
glfwTerminate();
return(1);
}
glfwMakeContextCurrent(window);
glfwSetKeyCallback(window, key_callback);
glfwSetWindowSizeCallback(window, window_resize_callback);
if (glewInit() != GLEW_OK)
{
fprintf(stderr, "[ERROR] Failed to initialize glew.\n");
glfwTerminate();
return(1);
}
glEnable(GL_DEPTH_TEST);
glEnable(GL_MULTISAMPLE);
arena = arena_alloc(Megabytes(64));
Mesh *cube_mesh = mesh_load_obj(arena, "../../data/models/cube.obj");
color_shader = create_shader_program("shaders/color.vs",
"shaders/color.fs");
target_fps = 60.0f;
target_spf = 1.0f/target_fps;
camera_pos = v3f(0.0f, 0.0f, 3.0f);
camera_speed = 2.0f;
fovx = 90.0f;
near = 0.1f;
far = 1000.0f;
last_time = glfwGetTime();
while (!glfwWindowShouldClose(window))
{
glfwPollEvents();
/* NOTE(pryazha): Update */
if (key_is_pressed(global_input.exit))
glfwSetWindowShouldClose(window, GLFW_TRUE);
V3F camera_dv = get_dv_camera_orbital(&global_input, camera_pos,
v3f_zero(), dt, camera_speed);
camera_pos = v3f_add(camera_pos, camera_dv);
projection = perspective(fovx, (F32)global_width/(F32)global_height, near, far);
view = look_at(camera_pos, v3f_zero(), v3f(0.0f, 1.0f, 0.0f));
model = mat4_identity();
input_update_last_state(&global_input);
/* NOTE(pryazha): Render */
glClearColor(0.15f, 0.15f, 0.15f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(color_shader);
shader_set_mat4fv(color_shader, "projection", projection);
shader_set_mat4fv(color_shader, "view", view);
shader_set_mat4fv(color_shader, "model", model);
mesh_draw(cube_mesh);
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;
}
arena_release(arena);
glfwTerminate();
return(0);
}
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