ReadPixels from Texures

[Nabroski]

Hello

I kind of stuck to read any data of pixels from the engine  
My goal is to read and set pixels from textures, just a little hint is probably enough.
Thank you all for your time

The playground:
http://babylonjs-playground.com/#1I5MDT#2

i think i looking for this, but i cant get it to work:

Best 
 

Edited July 6, 2016 by Nabroski

[NasimiAsl]

try this i am sorry i cant get time for complete your PG

 

var ReadTexture = function (txt,   w, h) { 
   var gl = document.getElementById('renderCanvas')
       .getContext("webgl", { preserveDrawingBuffer: true }) || 
        eng.get().canvas.getContext("experimental-webgl", { preserveDrawingBuffer: true });
    var fb = gl.createFramebuffer();
    gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, txt, 0);
 
    var pixels = new Uint8Array(w * h * 4);
    gl.readPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, pixels); 
    return pixels;
 }

var readPixel = function (pix, x, y,w ) {
    return {
        r: pix[y * 4 * w + x * 4], 
        g: pix[y * 4 * w + x * 4 + 1],
        b: pix[y * 4 * w + x * 4 + 2], 
        a: pix[y * 4 * w + x * 4 + 3]
    };
}

usage : readPixel( ReadTexture( texture , width,height) ,x, y, width );

 

[GameMonetize]

Do you want to read from a specific texture or from the rendering?

If you want to get the content of the framebuffer, you should have a look at this function:

https://github.com/BabylonJS/Babylon.js/blob/master/src/Tools/babylon.tools.ts#L568

[Nabroski]

I using Dynamic Textures now, to get and set pixels, if any of you has an easy to use 
Textures RGB example i would high apprentice it. Yeah, Yeah, i learn shades, ....someday.

I experimenting with Dump Framebuffer, thank you for the tip. I apply a screenshot now real time to an object, its nice to play with

Do you want to read from a specific texture or from the rendering?  From the rendering.

http://babylonjs-playground.com/#10OY8W#2