57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
var THREEx = THREEx || {}
|
|
|
|
/**
|
|
* namespace for the extension
|
|
* @type {Object}
|
|
*/
|
|
THREEx.Transparency = {};
|
|
THREEx.Transparency.objects = [];
|
|
|
|
/**
|
|
* init transparency of a object recursivly
|
|
* @param {THREE.Object3D[]} objects the object which are transparent
|
|
*/
|
|
THREEx.Transparency.init = function(objects){
|
|
objects.forEach(function(object){
|
|
THREEx.Transparency.objects.push(object);
|
|
object.material.transparent = true
|
|
object.material.depthWrite = false
|
|
});
|
|
}
|
|
|
|
THREEx.Transparency.push = function() {
|
|
for (var i = 0; i < arguments.length; i++) {
|
|
THREEx.Transparency.objects.push(arguments[i]);
|
|
arguments[i].material.transparent = true;
|
|
arguments[i].material.depthWrite = false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* update the object for transparency rendering
|
|
* @param {THREE.Object3D[]} objects the objects which are transparent
|
|
* @param {THREE.Camera} camera the camera used for rendering
|
|
*/
|
|
THREEx.Transparency.update = function(camera){
|
|
// update camera matrices
|
|
camera.updateMatrixWorld()
|
|
camera.matrixWorldInverse.getInverse( camera.matrixWorld )
|
|
|
|
var screenMatrix= new THREE.Matrix4().multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse)
|
|
var position = new THREE.Vector3()
|
|
|
|
// traverse the object
|
|
THREEx.Transparency.objects.forEach(function(object){
|
|
// update the matrixWorld of the object and its children
|
|
object.updateMatrixWorld()
|
|
// compute its position in screen space
|
|
position.setFromMatrixPosition( object.matrixWorld );
|
|
// object.matrixWorld.setMatrixFromPosition(position);
|
|
position.applyProjection( screenMatrix );
|
|
// use the position.x as renderDepth
|
|
object.renderDepth = position.z;
|
|
})
|
|
}
|
|
|
|
|