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#include <stdio.h>
#include <stdbool.h>
#include <SDL3/SDL.h>
#include <vecmath.h>
#include <physics.h>
#include "../dat.h"
static void process_events();
static SDL_Window *window;
static SDL_Renderer *renderer;
static bool running;
static Uint64 old_ticks, new_ticks;
static void renderbody(Body *);
static Body mousebody = {
.size = { 25, 25 },
};
static Body body = {
.pos = { 400, 300 },
.size = { 200, 200 }
};
int
main()
{
if(!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO)) {
fprintf(stderr, "SDL_Init(): %s\n", SDL_GetError());
return 1;
}
if(!SDL_CreateWindowAndRenderer("window", 800, 600, SDL_WINDOW_OPENGL, &window, &renderer)) {
fprintf(stderr, "SDL_CreateWindowAndRenderer: %s\n", SDL_GetError());
return -1;
}
running = true;
old_ticks = SDL_GetTicksNS();
while(running) {
double delta;
process_events();
new_ticks = SDL_GetTicksNS();
delta = (new_ticks - old_ticks) / 1000000000.0;
old_ticks = new_ticks;
SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0x00);
SDL_RenderClear(renderer);
if(phxaabbcheck(&body, &mousebody)) {
SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0x00);
} else {
SDL_SetRenderDrawColor(renderer, 0xFF, 0x00, 0x00, 0x00);
}
renderbody(&body);
renderbody(&mousebody);
if(phxaabbcheck(&body, &mousebody)) {
float n[2], p[2];
phxaabbresolv(&body, &mousebody, p, n);
SDL_RenderLine(renderer,
body.pos[0],
body.pos[1],
body.pos[0] + n[0] * body.size[0],
body.pos[1] + n[1] * body.size[1]
);
SDL_RenderLine(renderer,
mousebody.pos[0] - n[0] * mousebody.size[0],
mousebody.pos[1] - n[1] * mousebody.size[1],
mousebody.pos[0] - n[0] * mousebody.size[0] + p[0],
mousebody.pos[1] - n[1] * mousebody.size[1] + p[1]
);
}
SDL_RenderPresent(renderer);
}
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
void
process_events()
{
SDL_Event event;
while(SDL_PollEvent(&event)) {
switch(event.type) {
case SDL_EVENT_QUIT:
running = false;
break;
case SDL_EVENT_MOUSE_MOTION:
mousebody.pos[0] = event.motion.x;
mousebody.pos[1] = event.motion.y;
}
}
}
void
renderbody(Body *b)
{
SDL_RenderRect(renderer, &(SDL_FRect){
.x = b->pos[0] - b->size[0],
.y = b->pos[1] - b->size[1],
.w = b->size[0] * 2.0,
.h = b->size[1] * 2.0
});
}
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