three.js

问题 I'm using plane geometries as walls in a game. I'm using ray caster to provide the player from moving through them. The problem is that planes only works one way. When the player comes from the "front" side it works but when it comes from behind it moves through. Cube and sphere geometries works from any directions so my ray caster function seems to do the job. I have set material to be double sided but it doesn't help. Does any one know about this issue? How can I make the plane using both

问题 I'm trying to make use of the built-in shadow map plugin in three.js. After initial difficulties I have more or less acceptable image with one last glitch. That one being shadow appearing on top some (all?) surfaces, with normal 0,0,1. Below are pictures of the same model. Three.js Preview.app (Mac) And the code used to setup shadows: var shadowLight = new THREE.DirectionalLight(0xFFFFFF); shadowLight.position.x = cx + dmax/2; shadowLight.position.y = cy - dmax/2; shadowLight.position.z =

问题 I have a web app that uses ThreeJS. I am currently trying to include WebVR to be used with Gear VR. I am aware that I need to link to that web app using the ovrweb protocol in order to open it in Gear VR. My problem is that it does not. Whenever I use window.location.href = "ovrweb:http://my-app-url" , I am asked to attach the device to Gear VR. But once I do so, the screen remains black. I noticed that the same thing happens whenever I use some non-VR webpage as the URL (like ovrweb:https:/

问题 I'm trying to add a box (called "marker") perpendicular to the face I'm clicking on. To do this, on click, I cast a ray, if it hits something, I get the normal's intersecting point values and transfer them to the "marker" as its rotation values. Before asking this question, I read this answer ( How do I make an object perpendicular to a face with Three.js? ) but could not make it work... For now, it adds the marker where it needs to, but with a slightly wrong orientation expect on cube's top.

问题 I'm trying to copy the shadowCascade functionality from http://threejs.org/examples/webgl_morphtargets_md2_control.html to my project. I did this 1:1 however I only get a a little bit of shadowing at a certain angles and rotations, and often cut off. Further, enabling shadowCascade from start throws shader errors. I have to wait for some time until I can set shadowCascade = true. I tried to find documentation, links or hints explaining how shadowCascade works and what all those parameters do,

问题 I have a scene with two individual meshes. It looks like this: this.loadFiles("gras", (gras) => { var particleMaterial = new THREE.MeshPhongMaterial(); particleMaterial.map = THREE.ImageUtils.loadTexture("models/planets/gras.jpg"); particleMaterial.side = THREE.DoubleSide; this.mesh = new THREE.Mesh(gras,particleMaterial); this.loadFiles("rocks", (rocks) => { var particleMaterial = new THREE.MeshPhongMaterial(); particleMaterial.map = THREE.ImageUtils.loadTexture("models/planets/rocks.jpg");

问题 I am a complete newbee to three.js , and I cannot find out how to implement a "zoom all" with a OrthograpicCamera . I have been searching on the documentation and on the web, and I have only found solutions for PerspectiveCamera , that involve altering the field of view. My goal is to achieve a fitting of all the 3D objects of a scene to the screen, so they are shown as bigger as possible. Any ideas to achieve this will be helpful. Thanks. 回答1: You could calculate the 2D screen space bounding

问题 I was wondering whether I made a math mistake in my particle collision simulation found here. The particles don't seem to separate properly during collision resolution. Here is a code snippet from the function which separates particles and changes their velocities: //particle 1 var pi = particles[i]; //particle 2 var pj = particles[j]; //particle 1 to particle 2 var pimpj = pi.mesh.position.clone().sub(pj.mesh.position); //particle 2 to particle 1 var pjmpi = pj.mesh.position.clone().sub(pi

问题 I have a scene with two individual meshes. It looks like this: this.loadFiles("gras", (gras) => { var particleMaterial = new THREE.MeshPhongMaterial(); particleMaterial.map = THREE.ImageUtils.loadTexture("models/planets/gras.jpg"); particleMaterial.side = THREE.DoubleSide; this.mesh = new THREE.Mesh(gras,particleMaterial); this.loadFiles("rocks", (rocks) => { var particleMaterial = new THREE.MeshPhongMaterial(); particleMaterial.map = THREE.ImageUtils.loadTexture("models/planets/rocks.jpg");

问题 Currently JsBridge supports only getContext("2d") and not getContext("webgl"). public object getContext(string contextType) { if (contextType == "2d") { if (this.context == null) { this.context = new CanvasRenderingContext2D(this.window, this); } return this.context; } return null; } Ideally, to make JsBridge supports 3D, one needs public object getContext(string contextType) { if (contextType == "2d") { if (this.context == null) { this.context = new CanvasRenderingContext2D(this.window, this