我想通过 Three.js 中的 IdMapping 进行挑选
由于性能问题,我只有一个巨大的几何图形,计算如下:
for (var i = 0; i < numberOfVertices; i += 9) {
p1 = new THREE.Vector3(graphData.triangles.vertices[i+0], graphData.triangles.vertices[i+1], graphData.triangles.vertices[i+2]);
p2 = new THREE.Vector3(graphData.triangles.vertices[i+3], graphData.triangles.vertices[i+4], graphData.triangles.vertices[i+5]);
p3 = new THREE.Vector3(graphData.triangles.vertices[i+6], graphData.triangles.vertices[i+7], graphData.triangles.vertices[i+8]);
geometry.vertices.push(new THREE.Vertex( p1.clone() ));
geometry.vertices.push(new THREE.Vertex( p2.clone() ));
geometry.vertices.push(new THREE.Vertex( p3.clone() ));
geometry.faces.push( new THREE.Face3( i/3, i/3+1, i/3+2 ) );
// i want to do something like this:
geometry.colors.push(new THREE.Color(0xFF0000));
geometry.colors.push(new THREE.Color(0xFF0000));
geometry.colors.push(new THREE.Color(0xFF0000));
}
geometry.computeFaceNormals();
var material = new THREE.MeshBasicMaterial({});
var triangles = new THREE.Mesh( geometry, material );
scene.add(triangles);
如何为几何图形中的每个顶点分配不同的颜色?