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#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <math.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include "glad/gl.h"
#include "glad/glx.h"
#include "vertex.h"
#include "mons_math/vec4.h"
#include "mons_math/quat.h"
#include "embedded/shaders/basic.vert.glsl.h"
#include "embedded/shaders/basic_lit.frag.glsl.h"
#include "shader.h"
#include "mesh.h"
#include "qoi.h"
#include "texture.h"
#include "transform.h"
#include "model.h"
#include "projection.h"
#include "json.h"
#include "hashmap.h"
#include "gltf.h"
#include "input.h"
#include "camera.h"
#include <memory.h>
#include "color.h"
#include "light.h"
struct timespec current_time;
double delta_time = 0;
int main(void) {
// Make Window
Display *display = XOpenDisplay(NULL);
if (display == NULL) {
printf("Cannot connect to X server\n");
return EXIT_FAILURE;
}
int screen = DefaultScreen(display);
int glx_version = gladLoaderLoadGLX(display, screen);
if (!glx_version) {
printf("Unable to load GLX\n");
return EXIT_FAILURE;
}
printf("Loaded GLX %d.%d\n", GLAD_VERSION_MAJOR(glx_version),
GLAD_VERSION_MINOR(glx_version));
Window root = RootWindow(display, screen);
GLint visual_attributes[] = {GLX_RGBA, GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE, 24,
None};
XVisualInfo *visual_info =
glXChooseVisual(display, screen, visual_attributes);
Colormap colormap =
XCreateColormap(display, root, visual_info->visual, AllocNone);
XSetWindowAttributes attributes;
attributes.event_mask =
ExposureMask | KeyPressMask | KeyReleaseMask | StructureNotifyMask;
attributes.colormap = colormap;
Window window = XCreateWindow(
display, root, 0, 0, 640, 480, 0, visual_info->depth, InputOutput,
visual_info->visual, CWColormap | CWEventMask, &attributes);
// XSizeHints hints = {
// .flags = PMinSize | PMaxSize,
// .min_width = 640,
// .min_height = 480,
// .max_width = 640,
// .max_height = 480,
// };
// XSetWMNormalHints(display, window, &hints);
XMapWindow(display, window);
XStoreName(display, window, "Hello World!");
if (!window) {
printf("Unable to create window\n");
return EXIT_FAILURE;
}
GLXContext context = glXCreateContext(display, visual_info, NULL, GL_TRUE);
glXMakeCurrent(display, window, context);
// Load GL
int version = gladLoaderLoadGL();
if (!version) {
printf("Unable to load GL\n");
return EXIT_FAILURE;
}
printf("Loaded GL %d.%d\n", GLAD_VERSION_MAJOR(version),
GLAD_VERSION_MINOR(version));
XWindowAttributes gwa;
XGetWindowAttributes(display, window, &gwa);
glViewport(0, 0, gwa.width, gwa.height);
// Setup Shaders
mons_shader vertex_shader = mons_create_shader(
MONS_SHADER_TYPE_VERTEX, (char *)__embed_shaders_basic_vert_glsl,
__embed_shaders_basic_vert_glsl_len);
mons_shader fragment_shader = mons_create_shader(
MONS_SHADER_TYPE_FRAGMENT, (char *)__embed_shaders_basic_lit_frag_glsl,
__embed_shaders_basic_lit_frag_glsl_len);
mons_program shader_program =
mons_create_program(vertex_shader, fragment_shader);
FILE *texture_file = fopen("test.qoi", "rb");
mons_texture texture = mons_texture_load(texture_file);
mons_camera camera = {
.projection =
{
.near = 0.01f,
.far = 100.0f,
.fov = M_PI / 4.0f,
.aspect_ratio = gwa.width / (float)gwa.height,
},
.transform = {
.translation = mons_vec3_mul_i(MONS_VEC3_Z, 3),
.rotation = MONS_QUAT_IDENTITY,
.scale = MONS_VEC3_ONE, }}; clock_gettime(CLOCK_MONOTONIC_RAW, ¤t_time);
mons_model *models = NULL;
int model_count = 0;
mons_load_gltf("marble_bust/marble_bust_01_4k.gltf", shader_program,
&models, &model_count);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
mons_directional_light light = {
.transform = (mons_transform) {
.translation = (mons_vec3) { 0.0f, 0.0f, 3.0f },
.rotation = MONS_QUAT_IDENTITY,
.scale = MONS_VEC3_ONE,
},
.color = MONS_COLOR_WHITE,
};
mons_shader_set_vec4_global("light_color", light.color);
mons_shader_set_vec3_global("light_position", light.transform.translation);
float ambient_light = 0.1f;
mons_shader_set_float_global("ambient_strength", ambient_light);
// Main Loop
bool key_pressed[256] = {false};
bool key_just_pressed[256] = {false};
bool quit = false;
while (!quit) {
memset(key_just_pressed, false, 256);
while (XPending(display)) {
XEvent xev;
XNextEvent(display, &xev);
switch (xev.type) {
case KeyPress:
key_pressed[xev.xkey.keycode] = true;
key_just_pressed[xev.xkey.keycode] = true;
break;
case KeyRelease:
key_pressed[xev.xkey.keycode] = false;
break;
case ConfigureNotify:
if (xev.xconfigure.window == window) {
camera.projection.aspect_ratio =
xev.xconfigure.width / (float)xev.xconfigure.height;
glViewport(0, 0, xev.xconfigure.width,
xev.xconfigure.height);
}
default:
break;
}
}
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
struct timespec new_time;
clock_gettime(CLOCK_MONOTONIC_RAW, &new_time);
delta_time = (new_time.tv_sec - current_time.tv_sec) +
(new_time.tv_nsec - current_time.tv_nsec) / 1.0e9;
current_time = new_time;
mons_shader_set_mat4_global("view", mons_mat4_inverse(mons_transform_matrix(camera.transform)), GL_TRUE);
mons_shader_set_mat4_global("projection", mons_projection_matrix(camera.projection), GL_FALSE);
for (int i = 0; i < model_count; i++) {
mons_model_draw(models[i]);
mons_transform_rotate(&models[i].transform, mons_quat_from_axis_angle(MONS_VEC3_Y, (M_PI / 4.0f) * delta_time));
}
glBindVertexArray(0);
if (key_pressed[MONS_KEY_ESCAPE]) {
quit = true;
}
int x_axis_input = key_pressed[MONS_KEY_D] - key_pressed[MONS_KEY_A];
mons_transform_translate(
&camera.transform,
mons_vec3_mul_f(mons_transform_right(camera.transform), delta_time * x_axis_input));
int y_axis_input =
key_pressed[MONS_KEY_SPACE] - key_pressed[MONS_KEY_LSHIFT];
mons_transform_translate(
&camera.transform,
mons_vec3_mul_f(mons_transform_up(camera.transform), delta_time * y_axis_input));
int z_axis_input = key_pressed[MONS_KEY_W] - key_pressed[MONS_KEY_S];
mons_transform_translate(
&camera.transform,
mons_vec3_mul_f(mons_transform_forward(camera.transform), delta_time * -z_axis_input));
int y_rot_input =
key_pressed[MONS_KEY_RIGHT] - key_pressed[MONS_KEY_LEFT];
mons_transform_rotate(
&camera.transform,
mons_quat_from_axis_angle(MONS_VEC3_Y,
-M_PI / 2.0f * y_rot_input * delta_time));
int x_rot_input = key_pressed[MONS_KEY_UP] - key_pressed[MONS_KEY_DOWN];
mons_transform_rotate(
&camera.transform,
mons_quat_from_axis_angle(MONS_VEC3_X,
M_PI / 2.0f * x_rot_input * delta_time));
int fov_input = key_pressed[MONS_KEY_MINUS] - key_pressed[MONS_KEY_EQUAL];
camera.projection.fov += (fov_input * M_PI / 8.0 * delta_time);
if(key_just_pressed[MONS_KEY_BACKSPACE]) {
mons_transform_look_at(&camera.transform, MONS_VEC3_ZERO, MONS_VEC3_Y);
}
glXSwapBuffers(display, window);
}
glDeleteShader(vertex_shader);
glDeleteShader(fragment_shader);
glXMakeCurrent(display, 0, 0);
glXDestroyContext(display, context);
XDestroyWindow(display, window);
XFreeColormap(display, colormap);
XCloseDisplay(display);
gladLoaderUnloadGLX();
return EXIT_SUCCESS;
}
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