Collin Campbell
2d0408c09e
Allows use to ease some pain when converting PackedVector2Array to std::vector<Vector2>.
41 lines
1.2 KiB
GDScript
41 lines
1.2 KiB
GDScript
extends Node
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# provides all the utility functions for generating
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# a triangulized Polygon with holes
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class_name GeoPolyTriangulization
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# triangles are made by 3 vector
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const CHUNK_RESULT: int = 3
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# the boundary polygon
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var _outer_polygon: PackedVector2Array
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# inner polygons (holes)
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var _inner_polygons: Array[PackedVector2Array]
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# all vector points defined by outer and inner polygons
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var vectors: PackedVector2Array = []
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var _edge_safety: float = 0.0
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func _init(outer_polygon: PackedVector2Array, inner_polygons: Array[PackedVector2Array], edge_safety: float):
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self._outer_polygon = outer_polygon
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self._edge_safety = edge_safety
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# calulate boundary
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var hole_boundary = Geometry2D.offset_polygon(outer_polygon, self._edge_safety)[0]
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for ip in inner_polygons:
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var new_hole = Geometry2D.intersect_polygons(hole_boundary, ip)[0]
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self._inner_polygons.append(new_hole)
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self.vectors.append_array(self._outer_polygon)
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for inner_polygon in self._inner_polygons:
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self.vectors.append_array(inner_polygon)
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# returns all triangles generated by ear clipping the outer and inner polygons
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func triangulate() -> PackedInt32Array:
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var triag = Triangulization.new()
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return triag.triangulate_with_holes(self._outer_polygon, self._inner_polygons)
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