WebGL

问题 I want to make some changes to an application targeting Android SDK 22 (5.1) . I loaded the project in Android Studio 3 , got the Gradle upgrade message. Of course, doing that makes the whole thing explode as the way the new Gradle handles dependencies has become very nitpicky. I decided to go all out and just do the whole migration. Would have to do it at some point anyway. The application uses an XWalkView (extended in a class), instead of the native Webview, as we want to have some WebGL

问题 We're trying to find a solution to running/creating 3d animations for use on devices that have no webgl (office computers have weak video cards) and can run on IE8 as a minimum. Of course, no plugins shall be downloaded. We can run HTML5/CSS3 if we use a pollyfil such as css3pie, etc. Is it just not possible to do 3d stuff with a device that has no webgl support? Thank you. 回答1: I've used three.js succesfully with the CanvasRenderer(see Canvas examples). If it helps you can also try some of

问题 I'm in the process of developing a chrome VR web app. Now I'm desperately trying to figure out how to render a website into my into my stereoscopic scene which has some meshes in it. So I have my renderer for the meshes, which works well. The following code is only the relevant snippets: var renderer = new THREE.WebGLRenderer(); Then i have my stereoeffect renderer which receives the webgl renderer: var effect = new THREE.StereoEffect(renderer); Next is that I create the website renderer, and

问题 I am experimenting with a dds texture and cubemap mip maps. When changing the bias in textureCube() i get really nasty normal artifacts. I have no idea what is causing this and cant find much reference on the bias parameter. Live: (need to switch to uv and turn off normal) http://dusanbosnjak.com/test/webGL/new/poredjenjeNM/poredjenjeNormalaBias.html Screen: More Screens: Bias 4 edit Also of note, when you orbit around at say bias 6, you can clearly see the cubemap looking more or less

问题 I have a web application I am trying to show a plane of map image tiles in a 3D space. I want the plane to be always horizontal however the device rotate, the final effect is similar to this marine compass demo. I can now capture device orientation through the W3C device orientation API for mobile devices, and I successfully rendered the map image tiles. My problem is me lacking of essential math knowledge of how to rotate the camera correctly according to the device orientation. I am using

问题 My app for volume ray casting in WebGL is almost done. But i have found a problem. I have to simulate 3D texture by 2D texture. It is not problem. I am creating a huge texture from small slices. Dimensions of huge texture are about 4096x4096px. Problem is, that in some examples (it depends on number of slices) there is creating sth. like on the image bellow (i filled huge texture to white to be the fragment more visible). I know that num of stripes depends on num of rows in huge texture. I am

问题 Which is the WebView of a PhoneGap app, is the Safari mobile or desktop one? Is it possible to use WebGL in PhoneGap apps? If not which they work around to use them being able to submit the app to the Apple Store and Android Store Will I be able to submit to Apple Store a PhoneGap app that uses WebGL? 回答1: UPDATE: iOS 8 brought WebGL support on the UIWebView and WKWebView, so if you don't want to support previous versions you can use it without CocoonJS See more details on ludei's website OLD

问题 I am currently facing an error that I cannot seem to figure out. In chrome I am receiving: GL ERROR :GL_INVALID_VALUE : glTexImage2D: invalid internal_format GL_FALSE RENDER WARNING: there is no texture bound to the unit 0 Which is resulting in my 3D object having just a black texture rather than the image I have waiting to be rendered. 回答1: internal_format is the 3rd argument to gl.texImage2D . The error mesages says you are passing either 0 or undefined or null . All of those become 0 which

问题 I have some pretty simple 3D objects (basically THREE.Sphere which is a parent of 1-30 other THREE.Sphere s, with RGB color and no texture) to display in somewhat real time animation. The rendering is done in no time indeed, but I have some simple iterative calculation ( for-loops ) that are disturbing my display capabilities. The rendering itself is not the problem, but the computation for the next frame vertices is what causing the pain Meaning, when I just run the script, I can see that

问题 body { background-color:black; } #myCanvas { background-color:rgba(55,23,88,0.5); // (bg_R,bg_V,bg_B,bg_A) } var myCanvas= document.getElementById("myCanvas"); gl = myCanvas.getContext("webgl", { premultipliedAlpha: true , alpha:true }); gl.clearColor(0.8, 0, 0, 0.5); // (ccR,ccV,ccB,ccA) gl.clear(gl.COLOR_BUFFER_BIT); Now i am looking the color of the resulting canvas : rvba = 222,8,33,255 var myCanvas= document.getElementById("myCanvas"); gl = myCanvas.getContext("webgl", {