static void Main(string[] args)
{
//--------------------------------------------------------------------------------
// Build the scene
//--------------------------------------------------------------------------------
double t_init = Time.getTime();
Camera camera = new Camera()
{
width = 600,
height = 400,
subsamples = 1,
fov_y = 40,
pos = new vect3d(0, .75, 3)
};
var occluder = new GroupList();
var plane = new Plane(new vect3d(0, 0, 0), new vect3d(1, 0, 0), new vect3d(1, 0, -1), new ShadowShader());
//var plane = new Plane(new vect3d(0, 0, 0), new vect3d(1, 0, 0), new vect3d(1, 0, -1), new TextureShader("../../../../resources/images/wall_512_3_05_sml2.jpg"));
plane.x *= .3;
plane.y *= .3;
occluder.add(plane);
//occluder.add(new Sphere(new vect3d(0,.5,0), .5, new ShadowShader()));
//occluder.add(new Sphere(new vect3d(0, .5, 0), .5, new TextureSphereShader("../../../../resources/images/earthmap1k.jpg")));
GroupList obj = load_obj("../../../../resources/models/armadilloman2.obj", new ShadowShader());
occluder.add(new GroupTree(obj.list, obj.shader));
var scene = new Scene()
{
occluder = occluder
};
scene.lights.Add(new Light() { color = new vect3d(1, 1, 1) * 60, pos = new vect3d(-4, 8, 8) });
scene.lights.Add(new Light() { color = new vect3d(1, 1, 1) * 40, pos = new vect3d(1, 15, 10) });
//--------------------------------------------------------------------------------
// Render the scene
//--------------------------------------------------------------------------------
double t_start = Time.getTime();
System.Console.WriteLine("Time taken to create scene = {0}s", (t_start - t_init) / 1000);
Bitmap bmp = camera.create_image(scene);
double t_end = Time.getTime();
System.Console.WriteLine("Time taken to render = {0}s", (t_end - t_start) / 1000);
//--------------------------------------------------------------------------------
// Write the image to disk
//--------------------------------------------------------------------------------
bmp.Save("output.png");
}
public Bitmap create_image(Scene scene)
{
Bitmap bmp = new Bitmap(width, height);
// get the orientation of the camera
matrix4d rotmat = orient.getMatrix();
vect3d rt = new vect3d(rotmat.m[0], rotmat.m[1], rotmat.m[2]);
vect3d up = new vect3d(rotmat.m[4], rotmat.m[5], rotmat.m[6]);
vect3d fwd = new vect3d(rotmat.m[8], rotmat.m[9], rotmat.m[10]);
// convert the orientation to a 3D screen
double aspect = (double)width / (double)height;
double h = Math.Tan(fov_y * Math.PI / 360.0);
up *= -h * 2;
rt *= aspect * h * 2;
fwd *= -1;
// 2D screen conversions
vect3d dx = rt / width;
vect3d dy = up / height;
vect3d corner = fwd - rt * .5 - up * .5;
// expose each pixel
Ray r = new Ray();
r.scene = scene;
double subsample_res = 1.0 / subsamples;
for (int j = 0; j < bmp.Height; j++)
{
for (int i = 0; i < bmp.Width; i++)
{
vect3d color = new vect3d(0, 0, 0);
for (int jj = 0; jj < subsamples; jj++)
{
for (int ii = 0; ii < subsamples; ii++)
{
// set ray properties
r.pos = this.pos;
r.hit_dist = Double.MaxValue;
r.color = new vect3d(0, 0, 0);
r.hit_object = null;
r.dir = corner + dx * (i + (ii+.5/*Rand.rand.NextDouble()*/) * subsample_res) + dy * (j + (jj+.5/*Rand.rand.NextDouble()*/) * subsample_res);
r.dir.normalize();
// trace the ray
scene.trace(r);
if (r.hit_object != null)
{
r.hit_object.shader.colorize(r);
color += r.color;
}
}
}
color *= subsample_res * subsample_res;
// gamma correct the color
double brightness = color.length();
color /= Math.Sqrt(brightness);
// store the color
int red = clamp(color.x);
int green = clamp(color.y);
int blue = clamp(color.z);
bmp.SetPixel(i, j, Color.FromArgb(255, red, green, blue));
}
}
return bmp;
}