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Converting hex to rgb for vertex colors. (Got it!)

Home Forums WebGL & WebXR Troubleshooting Converting hex to rgb for vertex colors. (Got it!)

Viewing 8 posts - 1 through 8 (of 8 total)
  • Author
    Posts
  • #26461
    Xen Wildman
    Customer

    I realize that there is a way to input hex into the material colors but there doesn’t seem to be a clear way to set vertex color that way. I found a code snippet and added it to the JS then plugged it in to the color picker target:

    app.ExternalInterface.hexToRgb = function(hex) {
      // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
      var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
      hex = hex.replace(shorthandRegex, function(m, r, g, b) {
        return r + r + g + g + b + b;
      });
    
      var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
      return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
      } : null;
    
    }

    The result is not formatted in a way I can use, I need just the digits (228,60,31) or better yet linear (0.894,0.2353,0.1216)

    Object { r: 228, g: 60, b: 31 }
    visual_logic.js:610:11

    I then plug that into the math puzzles to /255. Gamma 2.2 is handled in the shader nodes.

    If anyone can help I’d really appreciate input.

    Edit: Or maybe if input type=”color” can output rgb.

    • This topic was modified 1 year, 5 months ago by Xen Wildman.
    • This topic was modified 1 year, 5 months ago by Xen Wildman.
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    #26479
    Xen Wildman
    Customer

    I found a shorter snippet that works perfectly:

    app.ExternalInterface.hexToRgb = function(hex) {
      return ['0x' + hex[1] + hex[2] | 0, '0x' + hex[3] + hex[4] | 0, '0x' + hex[5] + hex[6] | 0];
    }

    Edit: Need to check more.

    • This reply was modified 1 year, 5 months ago by Xen Wildman.
    #26484
    Xen Wildman
    Customer

    This is the code that ended up working for me:

    function hex2rgb(hex, opacity) {
            var h=hex.replace('#', '');
            h =  h.match(new RegExp('(.{'+h.length/3+'})', 'g'));
    
            for(var i=0; i<h.length; i++)
                h = parseInt(h.length==1? h+h:h, 16);
    
            if (typeof opacity != 'undefined')  h.push(opacity);
    
            return 'rgba('+h.join(',')+')';
    }
    #26487
    Xen Wildman
    Customer

    https://tinyurl.com/ybmfd5yq

    Here’s the link.

    #26558
    GlifTek
    Customer

    are you supposed to be able to also feed a Hex value into the sphere’s clicked prompt window that asks for RBG?

    #26560
    Xen Wildman
    Customer

    No, just the color picker in the top left. The RGB on the spheres was before I built the html with color picker.

    #26600

    glad you worked it out! :good:

    3D Verger, the CEO
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    #39756
    indrazulfi
    Participant

    https://tinyurl.com/ybmfd5yq

    Here’s the link.

    Hi @Xen, Would you mind to explain little bit more on this ? :)
    Thanks!

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