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