/**
* RenderScene
*/
public void RenderScene (Canvas canvas, int width, int section, int nsections)
{
Vector view = camera.GetViewDir ();
Vector up = camera.GetOrthoUp ();
Vector plane = new Vector ();
Vector horIncr = new Vector ();
Vector vertIncr = new Vector ();
double ylen = camera.GetFocalDist () * (double)Math.Tan (0.5f * camera.GetFOV ());
double xlen = ylen * canvas.GetWidth () / canvas.GetHeight ();
Point upleft = new Point ();
Point upright = new Point ();
Point lowleft = new Point ();
Point basepoint = new Point ();
Point current;
Ray eyeRay = new Ray ();
int ypixel, xpixel;
RayID = 1;
plane.Cross (view, up);
view.Scale (camera.GetFocalDist ());
up.Scale (ylen);
plane.Scale (-xlen);
upleft.FindCorner (view, up, plane, camera.GetPosition ());
plane.Negate ();
upright.FindCorner (view, up, plane, camera.GetPosition ());
up.Negate ();
plane.Negate ();
lowleft.FindCorner (view, up, plane, camera.GetPosition ());
horIncr.Sub (upright, upleft);
horIncr.Scale (horIncr.Length () / ((double)canvas.GetWidth ()));
vertIncr.Sub (lowleft, upleft);
vertIncr.Scale (vertIncr.Length () / ((double)canvas.GetHeight ()));
basepoint.Set (upleft.GetX () + 0.5f * (horIncr.GetX () + vertIncr.GetX ()), upleft.GetY () + 0.5f * (horIncr.GetY () + vertIncr.GetY ()),
upleft.GetZ () + 0.5f * (horIncr.GetZ () + vertIncr.GetZ ()));
eyeRay.SetOrigin (camera.GetPosition ());
int xstart = section * width / nsections;
int xend = xstart + width / nsections;
MainCL.logger.InfoFormat ("+" + xstart + " to " + (xend - 1) + " by " + canvas.GetHeight ());
for (ypixel = 0; ypixel < canvas.GetHeight (); ypixel++) {
current = new Point (basepoint);
for (xpixel = 0; xpixel < canvas.GetWidth (); xpixel++) {
if (xpixel >= xstart && xpixel < xend) {
Color color = new Color (0.0f, 0.0f, 0.0f);
eyeRay.GetDirection ().Sub (current, eyeRay.GetOrigin ());
eyeRay.GetDirection ().Normalize ();
eyeRay.SetID (RayID);
this.RayID = this.RayID + 1;
Shade (octree, eyeRay, color, 1.0f, 0, 0);
canvas.Write (Brightness, xpixel, ypixel, color);
}
current.Add (horIncr);
}
basepoint.Add (vertIncr);
}
MainCL.logger.InfoFormat ("-" + xstart + " to " + (xend - 1) + " by " + canvas.GetHeight ());
}