#include "ff.h"
#include "render.h"

#include <unistd.h>

#define W 1920
#define H 1080

#define FOV 90
#define APERTURE 0.8
#define FOCAL_LEN -1
#define SAMPLES_PER_PIXEL 1000

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

static const vec3_t camera_pos = { 80.0, 20.0, 60.0 };
static const vec3_t target = { 0.0, 0.0, 10.0 };

static const vec3_t sky_pos = { 0.4, 0.7, 1.0 };
static const vec3_t sky_neg = { 1.0, 1.0, 1.0 };

static const material_t floor = LAMBERTIAN(1.0, 0.94, 0.80);
static const material_t light = AREA_LIGHT(1.0, 0.8, 0.5, 3.0);
static const material_t white = LAMBERTIAN(1.0, 1.0, 1.0);
static const material_t gold = REFLECTIVE(1.0, 0.9, 0.5, 0.0);
static const material_t silver = REFLECTIVE(0.9, 0.9, 0.9, 0.0);
static const material_t glass = DIELECTRIC(1.5);

static obj_t objs[] = {
	SPHERE(0.0, -100'000.0, 0.0, 100'000.0, floor),
	SPHERE(-3000.0, 3000.0, -2000.0, 1000.0, light),
	SPHERE(0.0, 10.0, -33.0, 10.0, gold),
	SPHERE(0.0, 10.0, -11.0, 10.0, glass),
	SPHERE(0.0, 10.0, 11.0, 10.0, silver),
	SPHERE(0.0, 10.0, 33.0, 10.0, white),
};

static pix_t pixbuf[W * H];

int main()
{
	img_t img = { .pix = pixbuf };
	camera_t camera
	    = camera_init(camera_pos, target, FOV, W, H, APERTURE, FOCAL_LEN);

	const scene_t scene = {
		.sky_pos = sky_pos,
		.sky_neg = sky_neg,
		.objs = objs,
		.obj_count = NELEMS(objs),
	};
	render(&camera, &scene, &img, SAMPLES_PER_PIXEL);

	ff_write(STDOUT_FILENO, img);

	return 0;
}