public dynamic intersect(dynamic r, dynamic tmax)
{
dynamic nhits = 0;
dynamic temp = new Isect();
temp.t = 1e9;
this.inter = temp;
int i = 0;
while (i < this.prim.Length)
{
dynamic tp = this.prim[i].intersect(r);
bool sw = (tp != null);
if (sw)
{
dynamic isect = new Isect();
isect.t = tp.t;
isect.prim = tp.prim;
isect.surf = tp.surf;
isect.enter = tp.enter;
this.inter = isect;
nhits = nhits + 1;
}
i = i + 1;
}
return(nhits > 0 ? true : false);
}
public override Isect intersect(Ray ry)
{
dynamic p = ry.P;
dynamic d = ry.D;
v.sub2(c, p);
dynamic b = Vec.dot(v, d);
dynamic dotVV = Vec.dot(v, v);
dynamic disc = b * b - dotVV + r2;
if (disc < 0.0)
{
return(null);
}
disc = Math.Sqrt(disc);
dynamic t = (b - disc < 1e-6) ? b + disc : b - disc;
if (t < 1e-6)
{
return(null);
}
dynamic ip = new Isect();
ip.t = t;
ip.enter = dotVV > r2 + 1e-6 ? 1.0 : 0.0;
ip.prim = this;
ip.surf = this.surf;
return(ip);
}