Comments (5)
Notably, Earcut is fast (and is technically a separate library vendored into Three: https://github.com/mapbox/earcut), but it is far, far from ideal/Delaunay triangulation.
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Relating to #49 - implementing a better strategy for clipping and then triagulating polygons will leave more edges full intact and ultimately afford more connectivity in addition to being faster. Polygon splitting should occur by gathering all intersections edges with triangles and deriving new polygon boundaries from those connected lines.
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Polygon triangulation:
- https://algo.kaust.edu.sa/Documents/cs372l05.pdf
- https://en.wikipedia.org/wiki/Polygon_triangulation
Three.js may already have a good implementation:
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- Construct polygon edge sets with a set of pre-connected edges for the triangle
- When a splitting by a triangle
- Find the intersection edge overlap
- If the edge intersects another edge then split it into two edges and connect it to the split side edges
- Unconnected edges should be added to a list so they can be easily found for future splits
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Closing in favor of #51
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Related Issues (20)
- Extra edges after complex subtraction HOT 8
- Bounding box of csg geometry sometimes does not match the geometry (is much more bigger) HOT 4
- Orphaned Triangles After Operation HOT 6
- Planar faces failure HOT 1
- Texture not showing when exporting scene HOT 4
- Performance Issus when two bufferGeometries evaluate HOT 1
- Weird result using Three CSG HOT 2
- New failure case HOT 1
- Fix "isTriDegenerate" function
- Intersecting edges are being incorrectly reported HOT 1
- Any hint to avoid hitting maxDepth? HOT 1
- How to use multiple ExtrudeGeometry holes HOT 2
- Clear cached bounding boxes from result
- Large performance cost for coplanar triangles HOT 13
- I would like to ask, is there anything wrong with my Boolean operation to create geometry? HOT 1
- Result object of csg evaluator doesn't have textures HOT 8
- T-vertices after subtracting mesh from a plane HOT 4
- csg operation error HOT 4
- How to update a CSG Operation HOT 9
- Add a real simple example HOT 3
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