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Cutting Holes Into Mesh

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We be cutting holes :)
This commit is contained in:
Collin Campbell
2025-11-09 16:17:04 -05:00
parent 2d0408c09e
commit c6e4d4f725
12 changed files with 176 additions and 73 deletions
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35
demo/scripts/geometry/geopolytriangulization.gd
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@@ -4,37 +4,8 @@ extends Node
# a triangulized Polygon with holes
class_name GeoPolyTriangulization
# triangles are made by 3 vector
const CHUNK_RESULT: int = 3
# the boundary polygon
var _outer_polygon: PackedVector2Array
# inner polygons (holes)
var _inner_polygons: Array[PackedVector2Array]
# all vector points defined by outer and inner polygons
var vectors: PackedVector2Array = []
var _edge_safety: float = 0.0
func _init(outer_polygon: PackedVector2Array, inner_polygons: Array[PackedVector2Array], edge_safety: float):
self._outer_polygon = outer_polygon
self._edge_safety = edge_safety
# calulate boundary
var hole_boundary = Geometry2D.offset_polygon(outer_polygon, self._edge_safety)[0]
for ip in inner_polygons:
var new_hole = Geometry2D.intersect_polygons(hole_boundary, ip)[0]
self._inner_polygons.append(new_hole)
self.vectors.append_array(self._outer_polygon)
for inner_polygon in self._inner_polygons:
self.vectors.append_array(inner_polygon)
# returns all triangles generated by ear clipping the outer and inner polygons
func triangulate() -> PackedInt32Array:
static func triangulate(outer_polygon: PackedVector2Array, inner_polygons: Array[PackedVector2Array]) -> PackedInt32Array:
var triag = Triangulization.new()
return triag.triangulate_with_holes(self._outer_polygon, self._inner_polygons)
var result = triag.triangulate_with_holes(outer_polygon, inner_polygons)
return result