public static bool IsInLineOfSight(Vector3 position1, Vector3 position2, float collisionThreshold, ShapeCollection shapeCollection)
{
Segment segment = new Segment(new FlatRedBall.Math.Geometry.Point(ref position1),
new FlatRedBall.Math.Geometry.Point(ref position2));
for (int i = 0; i < shapeCollection.Polygons.Count; i++)
{
Polygon polygon = shapeCollection.Polygons[i];
if (polygon.CollideAgainst(segment) ||
(collisionThreshold > 0 && segment.DistanceTo(polygon) < collisionThreshold))
{
return(false);
}
}
for (int i = 0; i < shapeCollection.AxisAlignedRectangles.Count; i++)
{
AxisAlignedRectangle rectangle = shapeCollection.AxisAlignedRectangles[i];
FlatRedBall.Math.Geometry.Point throwaway;
if (rectangle.Intersects(segment, out throwaway) ||
(collisionThreshold > 0 && segment.DistanceTo(rectangle) < collisionThreshold))
{
return(false);
}
}
for (int i = 0; i < shapeCollection.Circles.Count; i++)
{
Circle circle = shapeCollection.Circles[i];
if (segment.DistanceTo(circle) < collisionThreshold)
{
return(false);
}
}
#if DEBUG
if (shapeCollection.Capsule2Ds.Count != 0)
{
throw new Exception("IsInLineOfSight does not support ShapeCollections with Capsule2Ds");
}
#endif
for (int i = 0; i < shapeCollection.Lines.Count; i++)
{
Line line = shapeCollection.Lines[i];
if (segment.DistanceTo(line.AsSegment()) < collisionThreshold)
{
return(false);
}
}
return(true);
}
