clipStart method
Implementation
int clipStart(Slot slot, ClippingAttachment clip) {
if (clipAttachment != null) return 0;
clipAttachment = clip;
final int n = clip.worldVerticesLength;
final Float32List vertices = ArrayUtils.copyWithNewArraySize(
this.clippingPolygon, n, double.infinity) as Float32List;
clip.computeWorldVertices(slot, 0, n, vertices, 0, 2);
final Float32List clippingPolygon = this.clippingPolygon as Float32List;
SkeletonClipping.makeClockwise(clippingPolygon);
final List<Float32List> clippingPolygons = this.clippingPolygons =
triangulator.decompose(
clippingPolygon, triangulator.triangulate(clippingPolygon));
final int nn = clippingPolygons.length;
for (int i = 0; i < nn; i++) {
final Float32List polygon = clippingPolygons[i];
SkeletonClipping.makeClockwise(polygon);
polygon
..add(polygon[0])
..add(polygon[1]);
}
return clippingPolygons.length;
}