private bool ForEachRay(ShadowRegion shadow, object p1, object p2, object p3)
{
if (_Shadows.Contains(shadow))
{
return(true);
}
LightSource light = (LightSource)p1;
Vector2 dir = light.Geometry.Position - Geometry.Position;
Vector2 diff = shadow.Geometry.Position - Geometry.Position;
float t = (diff.X * dir.X + diff.Y * dir.Y) / (dir.X * dir.X + dir.Y * dir.Y);
if (t < 0.0f)
{
t = 0.0f;
}
if (t > 1.0f)
{
t = 1.0f;
}
Vector2 closest = Geometry.Position + t * dir;
Vector2 d = shadow.Geometry.Position - closest;
float distsqr = d.X * d.X + d.Y * d.Y;
return(distsqr > shadow.Radius * shadow.Radius);
}
private bool UpdateShadow(ShadowRegion shad, object time, object p2, object p3)
{
shad.Update(time as GameTime); return(true);
}