public override bool Intersect(Ray ray, Intersection isec)
{
var d = ray.Direction.Dot(Normal);
if (d == 0)
{
return(false);
}
var t = (Position - ray.Origin).Dot(Normal) / d;
isec.Set(t, Normal, Material);
return(true);
}
public override bool Intersect(Ray ray, Intersection isec)
{
var a = 1;
var b = 2 * ray.Direction.Dot(ray.Origin - Center);
var c = Center.Dot(Center) + ray.Origin.Dot(ray.Origin) - 2 * (Center.Dot(ray.Origin)) - Radius * Radius;
var d = b * b - 4 * a * c;
if (d < 0)
{
return(false);
}
var sqrtd = (Prec)Math.Sqrt(d);
var t1 = (-b - sqrtd) / 2; //(2*a);
var t2 = (-b + sqrtd) / 2; //(2*a);
var t = t1;
if (t1 < 0)
{
if (t2 < 0)
{
return(false);
}
t = t2;
}
else
{
if (t2 > 0 && t2 < t1)
{
t = t2;
}
}
var p = ray.Origin + ray.Direction * t;
var n = (p - Center);
n.Normalize();
isec.Set(t, n, Material);
return(true);
}
public override bool Intersect(Ray ray, Intersection isec)
{
var a = 1;
var b = 2 * ray.Direction.Dot (ray.Origin - Center);
var c = Center.Dot (Center) + ray.Origin.Dot (ray.Origin) - 2 * (Center.Dot (ray.Origin)) - Radius * Radius;
var d = b * b - 4 * a * c;
if (d < 0)
return false;
var sqrtd = (Prec)Math.Sqrt (d);
var t1 = (-b - sqrtd) / 2;//(2*a);
var t2 = (-b + sqrtd) / 2;//(2*a);
var t = t1;
if (t1 < 0) {
if (t2 < 0)
return false;
t = t2;
} else {
if (t2 > 0 && t2 < t1)
t = t2;
}
var p = ray.Origin + ray.Direction * t;
var n = (p - Center);
n.Normalize ();
isec.Set (t, n, Material);
return true;
}
public override bool Intersect(Ray ray, Intersection isec)
{
var d = ray.Direction.Dot (Normal);
if (d == 0)
return false;
var t = (Position - ray.Origin).Dot (Normal) / d;
isec.Set (t, Normal, Material);
return true;
}