public float GetRayToLineSegmentIntersection(LineOccluder lineOccluder)
{
//Direction.Normalize();
Vector2 v1 = Origin - lineOccluder.StartPoint;
Vector2 v2 = lineOccluder.EndPoint - lineOccluder.StartPoint;
Vector2 v3 = new Vector2(-Direction.Y, Direction.X);
float dot = Vector2.Dot(v2, v3);
if (Math.Abs(dot) < 0.000001f)
{
return(-1.0f);
}
float t1 = MathCompanion.CrossProduct(v2, v1) / dot;
float t2 = Vector2.Dot(v1, v3) / dot;
if (t1 >= 0.0f && t2 >= 0.0f && t2 <= 1.0f)
{
t = t1;
HitSomething = true;
return(t1);
}
return(-1.0f);
}
// return the distance of ray origin to intersection point
public float GetRayToLineSegmentIntersection(Vector2 P1, Vector2 P2)
{
//Direction.Normalize();
Vector2 v1 = Origin - P1;
Vector2 v2 = P2 - P1;
Vector2 v3 = new Vector2(-Direction.Y, Direction.X);
float dot = Vector2.Dot(v2, v3);
if (Math.Abs(dot) < 0.000001f)
{
return(-1.0f);
}
float t1 = MathCompanion.CrossProduct(v2, v1) / dot;
float t2 = Vector2.Dot(v1, v3) / dot;
if (t1 >= 0.0f && t2 >= 0.0f && t2 <= 1.0f)
{
t = t1;
return(t1);
}
return(-1.0f);
}
