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/**
* @file main.c
* @brief The main loop and controls
* @date 2026-04-27
*/
#include <math.h>
#include <raylib.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "graphics.h"
#include "physics.h"
#include "common.h"
int main(void)
{
// physics related
object_t world[MAX_OBJECTS];
uint32_t objs_count = 0;
float force_gravity = FORCE_GRAVITY_DEFAULT;
object_t* grabbed_obj = NULL;
bool anti_gravity_toggle = false;
objs_count = 0;
init_physics(world, MAX_OBJECTS);
init_graphics(WINDOW_X, WINDOW_Y, SCREEN_TITLE);
Color bg_color = RANDOM_COLOR();
Image bg = GenImagePerlinNoise(GetScreenWidth(), GetScreenHeight(), 0, 0, 3.0f);
Texture2D bg_tex = LoadTextureFromImage(bg);
UnloadImage(bg);
while(!WindowShouldClose()) {
Vector2 pos_cursor = GetMousePosition();
if (IsMouseButtonReleased(MOUSE_BUTTON_RIGHT)) {
if(grabbed_obj != NULL) {
grabbed_obj->grabbed = false;
grabbed_obj = NULL;
}
}
if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
if(objs_count < MAX_OBJECTS) {
object_t obj = (object_t){
.color = RANDOM_COLOR(),
.elast = 0.05f,
// .frict = 0.99f,
.frict = 2.00f,
.pos = pos_cursor,
.pos_prev = pos_cursor,
.vel = {
(float)GetRandomValue(-30, 75),
(float)GetRandomValue(-30, 75)
},
.grabbed = false,
.registered = true,
.line_thickness = 2,
.mass = GetRandomValue(20, 50), // will be done later
.angle = 0.0f,
.angle_vel = 0.0f,
.vertex_n = 0,
.edge_n = 0,
};
generate_random_shape(&obj, (float)GetRandomValue(3, 30));
world[objs_count++] = obj;
}
}
if(IsKeyPressed(KEY_G)) {
anti_gravity_toggle = !anti_gravity_toggle;
// make the exact number customizable in the common.h
force_gravity = anti_gravity_toggle ? -75.0f : FORCE_GRAVITY_DEFAULT;
}
float dt = GetFrameTime();
const u32 steps = ITER_PER_FRAME;
float sub_dt = dt/(float)steps;
for(u32 iter = 0; iter < ITER_PER_FRAME; iter++) {
update_physics(world, objs_count, force_gravity, sub_dt);
}
BeginDrawing();
ClearBackground(BLACK);
DrawTexture(bg_tex, 0, 0, bg_color);
draw_graphics_objects(world, objs_count);
draw_graphics_info(objs_count);
EndDrawing();
}
CloseWindow();
return EXIT_SUCCESS;
}
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