//srand ( time(NULL) );

//---init virtual camera---
//point eye = {10.0f,400.0f,1000.0f};
//point eye = {0.0f,2.0f,-20.0f};
eye.x = 0.0f;
eye.y = 2.0f;
eye.z = -20.0f;

//point lookat = {0.5f,0.0f,0.0f};
lookat.x = 0.5f;
lookat.y = 0.0f;
lookat.z = 0.0f;

initCamera(&c,eye,lookat,WID,HEI);
setupCamera(&c);

//---malloc the image frame---
image = (uchar *) malloc(c.view.width * c.view.height * 3 * sizeof(uchar));
if(image == NULL)
{
    fprintf(stderr,"Error. Cannot malloc image frame.n");
    return 0;
}

//---just init the image frame with some data---
initImage(&c,image);

//---insert random N_SPHERES into the 'data' array
//generateRandomSpheres();
generateScene();

//---insert random N_LIGHTS into the 'lights' array
generateRandomLightSources();

//---create a 1D array with primary rays coordinates
//rays = generatePrimaryRays(&c);

for(i=0; i<NRAN; i++) urand[i].x = (double)rand() / RAND_MAX - 0.5;
for(i=0; i<NRAN; i++) urand[i].y = (double)rand() / RAND_MAX - 0.5;
for(i=0; i<NRAN; i++) irand[i] = (int)(NRAN * ((double)rand() / RAND_MAX));

//---ray tracing loop---

samples = 8;
s = 0;
rcp_samples = 1.0 / (float)samples;

for(i = 0 ; i < c.view.width ; i++)
{
    for(j = 0 ; j < c.view.height ; j++)
    {
        float r, g, b;
        r = g = b = 0.0;

        for(s=0; s<samples; s++) {
            ray rr = get_primary_ray(&c,i,j,s);
            color col = trace(c,&rr,0);
            r += col.r;
            g += col.g;
            b += col.b;
        }

        r = r * rcp_samples;
        g = g * rcp_samples;
        b = b * rcp_samples;

        //ray rr = get_primary_ray(&c, i, j, samples);
        //color clr = trace(c,&rr,0);

        //red green blue color components
        image[ 3* (i * c.view.height + j) + 0] = floatToIntColor(r);
        image[ 3* (i * c.view.height + j) + 1] = floatToIntColor(g);
        image[ 3* (i * c.view.height + j) + 2] = floatToIntColor(b);
    }
}

//printPrimaryRays(rays,c.view.width*c.view.height); //for testing only

if(save_bmp("output_rt.bmp",&c,image) != 0)
{
    fprintf(stderr,"Cannot write image 'output.bmp'.n");
    return 0;
}