threejs-csg (Experimental)

Constructive Solid Geometry for three.js, ES6 + BufferGeometry.

Note: I have stopped working on this for now and there are bugs, although it should work for simple shapes.

Developing

Run npm install then npm start

To view the demo, direct your browser to http://127.0.0.1:8080/demo/tests/index.html

Usage

const box = new Mesh(new BoxBufferGeometry(0.2, 0.2, 1), material);
box.position.set(0.1, 0.1, 0);

const sphere = new Mesh(new SphereBufferGeometry(0.1), material);
sphere.position.set(0, 0, -0.3);

const sphereB = sphere.clone();
sphereB.position.set(0, 0, 0.3);

const csg = new CSG();

csg.subtract([box, sphere, sphereB]);
// csg.union([box, sphere, sphereB]);
// csg.intersect([box, sphere]);

const resultMesh = csg.toMesh();

TODO

• Only the material from the first mesh is used.
• Vertex colors are ignored.
• Make it faster!!

Prior Work

http://evanw.github.io/csg.js/docs

https://github.com/jscad/csg.js

http://sandervanrossen.blogspot.com/2010/05/csg-operations.html

https://www.geometrictools.com/Documentation/ClipMesh.pdf