| public Hyperbolic2 ( Geometry g, System.Numerics.Complex fixedPlus, System.Numerics.Complex point, double offset ) : void | ||
| g | Geometry | |
| fixedPlus | System.Numerics.Complex | |
| point | System.Numerics.Complex | |
| offset | double | |
| return | void | |
/// <summary>
/// Slices a polygon by a circle with some thickness.
/// Input circle may be a line.
/// </summary>
/// <remarks>The input polygon might get reversed</remarks>
public static void SlicePolygon( Polygon p, CircleNE c, Geometry g, double thickness, out List<Polygon> output )
{
output = new List<Polygon>();
// Setup the two slicing circles.
CircleNE c1 = c.Clone(), c2 = c.Clone();
Mobius m = new Mobius();
Vector3D pointOnCircle = c.IsLine ? c.P1 : c.Center + new Vector3D( c.Radius, 0 );
m.Hyperbolic2( g, c1.CenterNE, pointOnCircle, thickness / 2 );
c1.Transform( m );
m.Hyperbolic2( g, c2.CenterNE, pointOnCircle, -thickness / 2 );
c2.Transform( m );
// ZZZ - alter Clip method to work on Polygons and use that.
// Slice it up.
List<Polygon> sliced1, sliced2;
Slicer.SlicePolygon( p, c1, out sliced1 );
Slicer.SlicePolygon( p, c2, out sliced2 );
// Keep the ones we want.
foreach( Polygon newPoly in sliced1 )
{
bool outside = !c1.IsPointInsideNE( newPoly.CentroidApprox );
if( outside )
output.Add( newPoly );
}
foreach( Polygon newPoly in sliced2 )
{
bool inside = c2.IsPointInsideNE( newPoly.CentroidApprox );
if( inside )
output.Add( newPoly );
}
}
