public override Color shade(RenderContext rc, Ray ray, HitRecord hrec, int depth)
{
Point hp = ray.pointOn(hrec.getT());
Vector normal = hrec.getPrimitive().normal(hp);
hp += 0.0001f * normal;
Scene scene = rc.getScene();
int numlights = scene.numberOfLights();
Color finalc = new Color(0,0,0);
for ( int i = 0; i < numlights; i++ ) {
Vector ldir = new Vector();
Color lcolor = new Color();
float ldist = scene.getLight(i).getLight(ref lcolor, ref ldir, rc, hp);
HitRecord shadowhr = new HitRecord();
Ray shadowray = new Ray(hp, ldir);
scene.getObject().intersect(ref shadowhr, rc, shadowray);
if ( shadowhr.getT() >= ldist || shadowhr.getT() < 0.01 ) {
float dp = Vector.dot(normal, ldir);
if( dp > 0 ) {
finalc += dp*lcolor;
}
}
}
return color * ( finalc * kd + scene.getAmbient() * ka );
}
public Color renderPixel(int x, int y)
{
Color color;
HitRecord hitRecord = new HitRecord();
Ray ray;
RenderContext renderContext = new RenderContext( this.scene );
float step = 2 / (float)this.scene.getXResolution();
float xStart = -1 + ( 0.5f * step );
float yStart = (-(float)this.scene.getYResolution() * (0.5f * step)) + (0.5f * step);
ray = this.scene.getCamera().generateRay( xStart + (x * step), yStart + (y * step) );
this.scene.traceRay( ray, hitRecord, renderContext );
if ( hitRecord.getT() == float.PositiveInfinity || hitRecord.getMaterial() == null || hitRecord.getPrimitive() == null ) {
color = this.scene.getBackground().getColor( renderContext, ray );
} else {
color = hitRecord.getMaterial().shade( renderContext, ray, hitRecord, 1 );
}
return color;
}
public override Color shade(RenderContext rc, Ray ray, HitRecord hrec, int depth)
{
Scene scene = rc.getScene();
Point hp = ray.pointOn(hrec.getT());
Vector normal = hrec.getPrimitive().normal(hp);
Vector v = scene.getCamera().getEye() - hp;
v.normalize();
hp += 0.0001f * normal;
int numlights = scene.numberOfLights();
Color finalc = new Color(0,0,0);
for(int i = 0; i < numlights; i++) {
Vector ldir = new Vector();
Color lcolor = new Color();
float ldist = scene.getLight(i).getLight(ref lcolor, ref ldir, rc, hp);
HitRecord shadowhr = new HitRecord();
Ray shadowray = new Ray(hp, ldir);
scene.getObject().intersect(ref shadowhr, rc, shadowray);
if((shadowhr.getT() >= ldist || shadowhr.getT() < 0.01)) {
float dp = Vector.dot(normal, ldir) * this.kd;
if(!(dp > 0)) dp = 0;
Vector r = 2*(Vector.dot(ldir, normal))*normal - ldir;
r.normalize();
float spec = Vector.dot(r, v);
if(!(spec > 0)) spec = 0;
else
spec = (float)System.Math.Pow(spec, this.n);
finalc += (dp*kd+spec*ks)*lcolor;
}
}
return color*(finalc + scene.getAmbient()*ka);
}
