A simple to use isosurfacing plugin for Three.js. It calculates the annoying stuff for you and takes care of updating geometry.

Examples [ interactive ]

new Snowball(vectors, {parameters})

make a new Snowball object with a single THREE.Vector3, or an array of them...

var vectors = []
for (var i = 0; i < 10; i++){
  vectors[i] = new THREE.Vector3(
    Math.random()*10,
    Math.random()*10,
    Math.random()*10
  ); 
};

var snowball = new Snowball(vectors,{
    radius:2,
    isolevel:0.2,
    resolution:20,
    material: new THREE.MeshBasicMaterial({wireframe: true})
  }
 );

... then access its mesh and add it to your scene.

scene.add(snowball.mesh);

All parameters are optional - relatively sensible default values will be calculated if they're left out.

Snowball calculates and updates the size of its voxel field as necessary based on the vectors it's been passed. Add a vector:

snowball.add(new THREE.Vector3(x, y, z));

much more to do. keep in touch with any suggestions/comments. <3 dane