#include "camera.h"
#include "ff.h"
#include "obj.h"
#include "rng.h"

#include <unistd.h>

#define W 800
#define H 600
#define FOCAL_LEN 1.0
#define VIEWPORT_H 2.0

#define NELEMS(arr) (sizeof(arr) / sizeof(arr[0]))

static const vec3_t camera_pos = { 0.0, 0.0, 0.0 };

static const obj_t scene[] = {
	SPHERE(1.0, 0.0, -3.0, 1.0),
	SPHERE(-2.0, -0.5, -5.0, 1.0),
	SPHERE(0.0, -1001.0, 0.0, 1000.0),
};

static pix_t pixbuf[W * H];

int main()
{
	rng_init();

	img_t img = { .pix = pixbuf };
	camera_t camera = camera_init(camera_pos, FOCAL_LEN, VIEWPORT_H, W, H);
	camera_render(&camera, scene, NELEMS(scene), &img);

	ff_write(STDOUT_FILENO, img);

	return 0;
}