3d-interface/js/BufferGeometryToGeometry.js

34 lines
896 B
JavaScript

var Converter = {};
Converter.toGeometry = function (bg) {
// The following snippet is from Mattatz - Masatatsu Nakamura http://mattatz.org
var attrib = bg.getAttribute('position');
if(attrib === undefined) {
throw new Error('a given BufferGeometry object must have a position attribute.');
}
var positions = attrib.array;
var vertices = [];
var i;
for(i = 0, n = positions.length; i < n; i += 3) {
var x = positions[i];
var y = positions[i + 1];
var z = positions[i + 2];
vertices.push(new THREE.Vector3(x, y, z));
}
var faces = [];
for(i = 0, n = vertices.length; i < n; i += 3) {
faces.push(new THREE.Face3(i, i + 1, i + 2));
}
var geometry = new THREE.Geometry();
geometry.vertices = vertices;
geometry.faces = faces;
geometry.computeFaceNormals();
return geometry;
};