WebGL is a Javascript API for rendering interactive 3D / 2D graphics on the HTML5 canvas element. It is based on OpenGL ES 2.0.

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2answers
75 views

WebGL techniques for normal mapping on morph targets?

I'm currently morphing some meshes by interpolating their positions and normals between target arrays, on the GPU, in WebGL. Now I need to apply normal maps to those morphs. For normal maps on ...
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2answers
37 views

Applicaton.ExternalEval(String script)

I was wondering, if Application.ExternalEval(String script); in Unity3D can return something. Like:String playerName = Application.ExternalEval("prompt("Please enter your name", "player1")"); Thank ...
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2answers
453 views

Omni-directional light shadow mapping with cubemaps in WebGL

First of all I must say, that I have read a lot of posts describing an usage of cubemaps, but I'm still confused about how to use them. My goal is to achieve a simple omni-directional (point) light ...
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1answer
61 views

Fragment shader compiling in webGL but not in OpenGL

I am programming in Haxe (language compiling to multiple platforms) and I have written some shaders. My fragment shader runs fine in html5, but when I try to compile for native (OS X and/or Neko, a ...
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2answers
152 views

Low quality bilinear sampling in WebGL/OpenGL/DirectX

I'm seeing low quality bilinear texture sampling in WebGL, OpenGL and Directx, and was wondering if anyone knew how to make it higher quality? The picture below should help show what I mean. The ...
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1answer
105 views

Is it possible or not to share a geometry among many meshes and applied a different shaderMaterial for each?

I instanciate one PlaneGeometry, then I instanciate 200 meshes sharing this geometry and with their own instance of a given shaderMaterial. Here is a simplified version of the code : ... var geom = ...
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0answers
52 views

LibGDX's HTML project doesn't show anything in Browser

The question is self explanatory, when I run my demo-html project as a Web Application and I open Chrome with the provided link by eclipse, my browser doesn't show the image it is supposed to show in ...
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1answer
53 views

WebGL half float equivelant?

I'm trying to find a half float for the purposes of doing math in a fragment shader, not trying to have a half float texture. Is there an equivalent of the half float data type in WebGL? I know you ...
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0answers
26 views

WebGL Multiple Lights, Blending, and Render Order

I am trying to do simple forward rendering for multiple lights using additive blending in WebGL. Following advice from this SO and this one, I simply turn on blending using glBlendFunc(GL_ONE, GL_ONE) ...
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1answer
46 views

Techniques for drawing lines, with mouse, on 3D objects in WebGL or OpenGL?

Can anyone point me to techniques for drawing lines, with the mouse, on 3D objects in WebGL or OpenGL? Here's the effect I'm looking for, using WebGL: http://www.spacegoo.com/cadillac/ I can imagine ...
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0answers
28 views

Phaserjs, filters, save to image cache

I've tried to apply a Pixi filter to a image and save it to cache but the image doesn't get saved with the filter. colorMatrix = new PIXI.ColorMatrixFilter(); colorMatrix.matrix = [0,0.0,0.5,-0.2, ...
5
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2answers
698 views

How can I tell a fragment shader to not write a particular pixel?

In a WebGL I'd like to send a screen space quad through that gets processed by a fragment shader, but have the fragment shader only write out a pixel under certain conditions (say... that it was ...
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0answers
38 views

Array of script class references in inspector

I'm trying to remove the Reflection part of ones of my scripts so it works in WebGL, however I am having some trouble. Basically I need a way to store references to classes in an Inspector array so ...
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2answers
278 views

Three.js: Lighting not calculating correctly on THREE.Geometry objects

I have a three.js (REVISION: '68') issue with the lighting of THREE.Geometry objects: I'm using the THREE.Geometry class to build up objects using vertices and faces, then I computeFaceNormals() ...
1
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1answer
67 views

How are CSS and WebGL coordinates related? [closed]

I'd like to build a simple framework which rendering combines web page DOM elements with WebGL, such that they're manipulable in the same coordinate space. How does the plain CSS coordinate system ...
16
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3answers
5k views

Is there a way to use an arbitrary number of lights in a fragment shader?

Is there a way to pass an arbitrary number of light locations (and colors) for the fragment shader, and loop over them in the shader? If not, then how are multiple lights supposed to be simulated? ...
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0answers
46 views

possible way to bring canvas 2d animation in canvas webgl context

when added 2d animation canvas in 3d webgl canvas as texture, 2d animation and 3d animation both stopped working. Any reference for this.
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1answer
145 views

WebGL (three.js) - rendering object behind camera far plane

I need to have one object that is always visible/rendered (a lens flare, to be exact). I don't want to set the camera far plane to the maximum possible distance between camera and the sun (performance ...
2
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1answer
133 views

How to implement user friendly screen panning on 3D HTML canvas for RTS game

How can I get RTS map panning like how it was done in C&C red alert (with the mouse at the edge of the screen moves the screen in that direction) with a Babylon.js RTS game in the html canvas? ...
4
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2answers
94 views

Confused about Max Vertex Uniform Vector limit

While coding my WebGL app I've encountered an interesting phenomena: On my first PC (with GPU Radeon HD 5850), BrowserLeaks (link) tells me that in my browser - Google Chrome Version 36.0.1985.143m ...
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1answer
81 views

JavaScript THREE.js webgl spotlight rendering

I'm playing with webgl/JavaScript/THREE and a spotlight. And I see unexpected results. And I don't understand what's going on, and I'm hoping you can point me in the right direction. In my particular ...
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1answer
67 views

Compress 16 bit raw data in webgl

I have a 3D volume where every voxel is 16 bits. Is there anyway I can use some kind of compression to store the data so I can use less video ram? Webgl supported different compressiosn if you enable ...
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1answer
57 views

How can I make a flapper game that scales to multiple aspect ratios?

So I've never made a game before besides a basic 4:3 aspect ratio flapper, so bare with me. Recently I had this wild idea that I wanted to make this complected (for a 2d) game in cca. Unfortunately ...
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3answers
2k views

Missing features from WebGL and OpenGL ES

I've started using WebGL and am pleased with how easy it is to leverage my OpenGL (and by extension OpenGL ES) experience. However, my understanding is as follows: OpenGL ES is a subset of OpenGL ...
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0answers
149 views

WebGL - Luminance textures from JPG images

Is there any way to create a WebGL texture with Luminance format from JPG image? JPG images have 3 color channels and luminance texture has only one channel. The problem is that gl.texImage2D can't ...
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1answer
118 views

Backface culling without light leaking through

I want to be able to see through walls, so to do this I used planes for the walls, and enabled backface culling. However with shadow mapping I have a lot of light leaking through: I read that using ...
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1answer
1k views

(Three.js) - What object3D properties are required to make rayCaster.intersectObjects() work?

FYI, i am trying to do something almost identical to the following: Merging geometry/mesh without losing benefits I essentially have a list of Three.object3D's. These objects are "merged" together ...
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0answers
58 views

WebGL stereo on Linux

Is there any way for us to use frame-sequential stereo with WebGL without having to boot into Windows and use the DirectX hack?
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1answer
124 views

WebGL wrong scaling of rectangle

I'm working with this tutorial http://www.html5rocks.com/en/tutorials/webgl/webgl_transforms/ and my result is, that the rectangle moves in the direction of it's scaling values, and also scales at ...
3
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2answers
225 views

10% idle time in WebGL

I'm using requestAnimationFrame to handle my frame rate in a WebGL game, and running through the Chrome profile shows that a solid 10% of the time is spent in (idle). Why is that? How can I reduce ...
3
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1answer
2k views

Orthographic Camera and Raycasting in Three.js

I'm working on a test project porting a simple game from iOS to Javascript. I've got the orthographic camera working and it can view the objects in the scene and move up and down the tower of meshes ...
2
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2answers
382 views

Strange if-else branching behavior in a fragment shader

In my fragment shader I have passed an uniform int uLightType variable, which indicates what type of light is in usage right now. The problem is that if-else branching does not work correctly - the ...
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0answers
74 views

Web-Based Traffic Simulation based on Discrete Event SImulation + AI

I'm working on the application of 2D web-based traffic simulation. I am looking for a library that is suitable for my application. I'm making an application based on discrete event simulation, each ...
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1answer
974 views

Is HTML5/WebGL performance unreliable on low-end Android tablets and phones?

I've developed a couple of WebGL games, and am trying them out on Android. I found that they run very slowly on my tablet, however. For example, a game with 10 sprites or so runs as 5fps. I tried ...
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1answer
105 views

How would one outline an alpha transparency layer in javscript and/or php? [duplicate]

I simply want an outline/edge detection of the character/item/object that is selected or doing something. I'm seeing lots of versions of this question for different languages, but I would appreciate ...
5
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3answers
6k views

How do I load Collada models into a WebGL app? [closed]

I have written some simple apps following the tutorials on http://learningwebgl.com. What is the simplest way to load and display Collada model files, particularly the files available from Google 3D ...
0
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1answer
209 views

One draw call with one big mesh VS many draw calls with many little meshes

I have read that in order to optimize WebGL application, one should reduce an amount of draw calls. But does it mean that computing a one big mesh from all single meshes on CPU by modifying vertices ...
2
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5answers
2k views

Are there any good html 5 mmo design tutorials? [closed]

Hey all. I got a rather inspired after playing gaia online's zOMG and wanted to revive an old project idea I've had laying around for a few years now. I'm looking to work with html5 (ie canvas, svg ...
2
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2answers
91 views

Linking one uniform variable to many shaders

Let's say, that I have 3 programs, and in each of those programs there is a view matrix uniform, which should be the same in all those programs. Right now, when my camera moves, I need to re-upload ...
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0answers
315 views

How can I reduce draw calls when using glBufferSubData and DYNAMIC_DRAW?

At first I had the problem where I had about 150 rectangles rendered every tick. I only used STATIC_DRAW and glBufferData. I added support for DYNAMIC_DRAW and glBufferSubData and now I have a very ...
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0answers
200 views

Adding rivers to procedural generated terrain [closed]

I have an heightmap generated using libnoise (c++). I am loading it from the babylon.js framework (3dWebGL). I have my heightmap image file and also a river position image file, also generated using ...
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1answer
140 views

List of GLSL ES built-in variables

I am writing an article on WebGL and three.js, I'm trying to search all the built-in variables available in the vertex and fragment shader. I've found many sites mentioning some, for example: ...
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1answer
228 views

GPU skinning algorithm incorrectly distorts mesh

I've been trying to implement a GPU-based matrix palette skinning algorithm with WebGL, but the rendering appears incorrect even though I can't find evident conceptual problems in the underlying ...
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3answers
678 views

Can Simple Direct Media Layer be used with WebGL?

I have read that on desktop OpenGL + SDL is a great way to learn. In looking at WebGL I couldn't find a Web version of SDL. On their site I see bindings for all sorts of languages, but no JavaScript. ...
0
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1answer
119 views

bug in webgl phong shader: lighting rotates with object

I'm working on a simple phong shader in webgl, and I think I'm getting close but something is still wrong. Dead give away: if I have a billboard and have it roll (so it spins like a wheel), the part ...
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1answer
260 views

Custom lookAt function goes wild

I have written a custom lookAt function based on a lot of posts from all over the net, and it works very nice... except when a rotation (which is stored in a quaternion) crosses some 'threshold'. ...
1
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1answer
523 views

How can I restrict the rotation of an object to a subset of axes using quaternions?

I've got a question about quaternions in my WebGL application. How can I rotate an object only around two axes? For example, how can I exclude/nullify rotation about the Y axis? The problem is that ...
6
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1answer
3k views

GLSL pack floats into an RGBA texture

I want to compose conventional triangle-based models and particles with a ray-traced scene at a reasonable frame-rate. webGL does not let you write the gl_FragDepth in the fragment shader. You ...
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2answers
146 views

How to use blender files in your own engine?

It is not trivial to use your own shader on blender, so I've created a good-looking webgl shader. Now, what do I need to use the things I made in blender on it? An obvious first idea would be to parse ...
0
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1answer
204 views

Strange quaternion camera streching in WebGL

So after a lot of researching about quaternions I almost got the quaternion camera working. Almost, cause it rotates in a proper way only in a vertical axis. Other rotations stretches and deforms the ...