public static Shape2 TriangulateConvexes(this Shape2 shape)
{
return(new Shape2
{
Points = shape.Points,
Convexes = FillEngine.Triangulate(shape.Points, shape.Convexes)
});
}
public static Shape ToShape(this Polygon polygon, double?volume = null, bool triangulate = false)
{
if (!volume.HasValue && !triangulate)
{
return new Shape
{
Points2 = polygon.Points,
Convexes = new[] { polygon.Points.Index().ToArray() }
}
}
;
var convexes = FillEngine.FindConvexes(polygon);
var trConvexes = FillEngine.Triangulate(polygon.Points, convexes);
if (!volume.HasValue)
{
return new Shape()
{
Points2 = polygon.Points,
Convexes = trConvexes
}
}
;
var halfVolume = new Vector3(0, 0, volume.Value / 2);
return(new Shape
{
Points3 = polygon.Points.Select(p => p.ToV3() - halfVolume)
.Concat(polygon.Points.Select(p => p.ToV3() + halfVolume)).ToArray(),
Convexes = trConvexes.Select(c => c.Reverse().ToArray())
.Concat(trConvexes.Transform(v => v + polygon.Points.Length))
.Concat(polygon.Points.Index().Reverse().SelectCirclePair((i, j) => new int[] { i, i + polygon.Points.Length, j + polygon.Points.Length, j }).ToArray())
.ToArray()
});
}
