how to color based stuff multiplied by ?

    Jan 04 2013 | 10:54 pm
    hello, I'm drawing very basic shape using these latter are used with position, scale are okay.
    I have a problem to color them using a color_matrix feeding I tried to specify glcolor or not in the commands passed to ... all the same.
    is there an alternative to to draw very basic lines ? is there another way ?
    any leads would be interesting for me.

    • Jan 07 2013 | 10:30 pm
      drawing basic lines can be done with @drawmode lines or
    • Jan 10 2013 | 11:18 pm
      I guess my problem is a double problem. As you mentioned, mesh drawing seems to be my way here (for other reason) But I am still not okay with coloring stuff using my instances "multiplied" by remain grey.
    • Jan 10 2013 | 11:42 pm
      I'm okay without to color gridshape using the required float32 RGBA matrix feeding
      I don't know why I cannot color through a color matrix feeding the gl multiple and it is the same with I'm missing something probably like the elephant inside the room...
    • Jan 11 2013 | 1:51 am
      post your patch
    • Jan 11 2013 | 9:31 pm
      here it is, Rob.
    • Jan 11 2013 | 10:30 pm
      ok, the reason the gl.mesh is ignoring the color values from gl.multiple, is because you are sending it color planes from outputs a 12 plane matrix when matrixouput is enabled. planes 9-12 are color info, causing gl.mesh to ignore color from gl.multiple. if you don't pass these color planes, it will work as expected.
      simply insert a "jit.pack 1 @jump 8" between the gl.gridshape and the gl.mesh. this will pass only the first 8 planes (3 position, 2 texcoord, and 3 normals). won't work with gl.multiple colors, due to the way the object draws itself.
    • Jan 12 2013 | 12:15 am
      hi, there is a solution a bit tricky ; remove "glcolor" message to sketch; replace "color" to "attr.color" on multiple object :)
    • Jan 12 2013 | 9:12 am
      Thanks Rob and matmat. Ok for the 12 plane matrix, I knew it, I got it in this case. I didn't know about attr.color. This sounds the way to control each object color.
      THANKS a lot.
    • Jan 23 2013 | 1:35 pm
      Hey all! I'm having a similar issue. I tried using "attr.color" instead of color but it still won't do the trick. Could you help me out here please?
    • Jan 23 2013 | 2:14 pm
      hi for your patch you don't need to use "attr.color", you can simply use "color"
    • Jul 09 2015 | 2:15 am
      I am having a problem down on this line. I am trying to map the colors of a gridshape onto the multiple object (to control an led setup) but i just can't seem to get it right. I can map the 2d matrix onto the multiple object, which would multiple that, but not the actual 3d color values. What are your thoughts on that? What am i missing?
    • Jul 09 2015 | 5:04 pm
      can you explain a little more what you're trying to achieve? it's not clear from the patch you posted.