public RColor Color(P3 p, Ray r, SceneObject s)
{
P3 N = s.Geo.Normal(p);
float c1 = -N.Dot(r.direction);
P3 R1 = r.direction.Add(N.Scale(2).Scale(c1));
float d;
Ray r1 = new Ray(p, R1);
SceneObject so = Form1.shootRay(r1, out d);
if (so == null) {
return new RColor(0, 0, 0);
} else return so.ColorAt(r1.Travel(d), r1);
}
public float Intersect(Ray E)
{
P3 P;
P3 EO = center.Sub(E.start);
float d;
float v = EO.Dot(E.direction);
float disc = (r * r) - ((EO.Dot(EO) - (v * v)));
if (disc < 0) {
return -1;
} else {
d = (float)Math.Sqrt(disc);
P = E.start.Add(E.direction.Scale(v - d));
}
if (v - d < 0 && v + d < 0) {
return -1;
} else if (v - d > 0) return v - d;
else return v + d;
}
public static SceneObject shootRay(Ray r, out float d)
{
d = -1;
SceneObject close = null;
foreach (SceneObject s in objects) {
float ds = s.Distance(r);
if (ds != -1 && ds > 0.01) {
if (d != -1) {
if (ds < d) {
d = ds;
close = s;
}
} else {
d = ds;
close = s;
}
}
}
return close;
}
public void nonThreadedTrace()
{
float distance;
P3 d;
Ray r;
SceneObject s;
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
d = new P3(i / Form1.width * 2 - 1, 0, j / Form1.height * 2 - 1);
r = new Ray(Form1.cameraPos, d.Sub(Form1.cameraPos));
s = Form1.shootRay(r, out distance);
if (s != null) {
try {
Form1.cs[i, j] = s.ColorAt(r.Travel(distance), r);
} catch (Exception e) { //Set pixel to black if there are any errors
Form1.cs[i, j] = new RColor(0, 0, 0);
}
}
}
}
}
public float Distance(Ray r)
{
return Geo.Intersect(r);
}
public RColor ColorAt(P3 p, Ray r)
{
return Skin.Color(p, r, this);
}
public RColor Color(P3 p, Ray r, SceneObject s)
{
RColor light = Form1.getLight(p, s.Geo.Normal(p));
return light.Mul(s.Texture.Color(s.Geo.ToP2(p)));
}
public float Intersect(Ray r)
{
float t = -(d + n.Dot(r.start)) / n.Dot(r.direction);
return t;
}