public static bool RayPlaneIntersection(out float t, Ray ray, Plane plane)
{
float dot = Vector3.Dot(ray.Dir, plane.Normal);
if (System.Math.Abs(dot) < JiggleMath.Epsilon)
{
t = 0.0f;
return false;
}
float dist = Distance.PointPlaneDistance(ray.Origin, plane);
t = -dist / dot;
return (t >= 0.0f);
}
public static bool LinePlaneIntersection(out float t, Line line, Plane plane)
{
float dot = Vector3.Dot(line.Dir, plane.Normal);
if (System.Math.Abs(dot) < JiggleMath.Epsilon)
{
t = 0.0f;
return false;
}
float dist = Distance.PointPlaneDistance(line.Origin,plane);
t = -dist / dot;
return true;
}
public Plane GetInverse()
{
Plane plane = new Plane(this.normal, this.d);
plane.Invert();
return plane;
}
public static bool SegmentPlaneIntersection(out float tS, Segment seg, Plane plane)
{
float denom = Vector3.Dot(plane.Normal, seg.Delta);
if (System.Math.Abs(denom) > JiggleMath.Epsilon)
{
float t = -(Vector3.Dot(plane.Normal, seg.Origin) + plane.D) / denom;
if (t < 0.0f || t > 1.0f)
{
tS = 0.0f;
return false;
}
tS = t;
return true;
}
else
{
// parallel - return false even if it's in the plane
tS = 0.0f;
return false;
}
}
public override Primitive Clone()
{
Plane newPlane = new Plane(this.Normal, this.D);
newPlane.Transform = Transform;
return newPlane;
}