#include "raytracer.h"

#include "octree.h"

#include "image.h"

#include "common_sdl.h"

Camera cam;

Light light(Vector3(-2.0, 10.0, -2.0), Colour(0.9, 0.9, 0.9));

Float lx, ly, lz, cf;

void update_callback()

{

	if (lx != 0.0)

		light.pos.x += lx;

	if (ly != 0.0)

		light.pos.y += ly;

	if (lz != 0.0)

		light.pos.z += lz;

	if (cf != 0.0)

		cam.f += cf;

}

void key_callback(int key, int down)

{

	switch (key)

	{

		case SDLK_r:

			lx = -0.1 * down;

			break;

		case SDLK_t:

			lx = +0.1 * down;

			break;

		case SDLK_f:

			ly = -0.1 * down;

			break;

		case SDLK_g:

			ly = +0.1 * down;

			break;

		case SDLK_v:

			lz = -0.1 * down;

			break;

		case SDLK_b:

			lz = +0.1 * down;

			break;

		case SDLK_z:

			cf = -0.02 * down;

			break;

		case SDLK_x:

			cf = +0.02 * down;

			break;

	}

}

int main(int argc, char **argv)

{

	Raytracer rt;

	Octree top;

	rt.setTop(&top);

	rt.addlight(&light);

	//Light light2;

	//light2.colour = Colour(0.7, 0.3, 0.6);

	//rt.addlight(&light2);

	Material mat0a(Colour(0.7, 0.7, 0.7));

	mat0a. setReflectivity(0.0);

	Box box(Vector3(-10.0, -1.2, -20.0), Vector3(10.0, -1.0, 0.0), &mat0a);

	rt.addshape(&box);

	Material mat0b(Colour(0.1, 0.7, 0.8));

	mat0b.setReflectivity(0.7);

	Box box2(Vector3(-10.0, -1.2, -20.0), Vector3(10.0, 10.0, -20.2), &mat0b);

	rt.addshape(&box2);

	Material mat1(Colour(1.0, 0.0, 0.0));

	Sphere bigsphere(Vector3(3.0, 2.0, -7.0), 3.0, &mat1);

	rt.addshape(&bigsphere);

	Material mat2(Colour(0.0, 1.0, 0.0));

	Sphere smallsphere(Vector3(-5.5, 1.5, -8.0), 2.0, &mat2);

	rt.addshape(&smallsphere);

	Material mat3(Colour(0.0, 0.0, 1.0));

	mat3.setReflectivity(0.1);

	mat3.setTransmissivity(0.8, 1.5);

	Sphere tinysphere(Vector3(-1.2, 0.0, -2.0), 0.7, &mat3);

	rt.addshape(&tinysphere);

	top.optimize();

	cam.setEye(Vector3(-2.28908, 4.30992, 12.3051));

	cam.p = Vector3(0.0988566, -0.139543, -0.985269);

	cam.u = Vector3(-0.995004, 0, -0.0998334);

	cam.v = Vector3(0.0139311, 0.990216, -0.138846);

	rt.setCamera(&cam);

	w = 800;

	h = 600;

	/* run interactive mode */

	loop_sdl(rt, cam, update_callback, key_callback);

	/* render image */

	if (argc == 2 && !strcmp(argv[1], "-r"))

	{

		pyrit_verbosity = 2;

		Float *fdata = (Float *) malloc(w*h*3*sizeof(Float));

		DefaultSampler sampler(fdata, w, h);

		sampler.setOversample(2);

		rt.setSampler(&sampler);

		rt.render();

		struct image *img;

		new_image(&img, w, h, 3);

		Float *fd = fdata;

		for (char *cd = img->data; cd != img->data + w*h*3; cd++, fd++) {

			if (*fd > 1.0)

				*cd = 255;

			else

				*cd = (unsigned char)(*fd * 255.0);

		}

		free(fdata);

		save_png("spheres_shadow.png", img);

		destroy_image(&img);

	}

}