Passing array to shader (DEF-2055)

Questions
#1

Hi!
Is there a way to pass an array of data to vertex shader?
thanks!

2 Likes
Shader "sprite constants" limit
Shader "sprite constants" limit
Creation of a 2D water surface
#2

Ivan, this is outside my domain of expertise. @sven or @Ragnar_Svensson, could you please answer this one?

#3

How large of array data do you need to send?

#4

let’s say 100 floats
so far I use
uniform mediump vec4 data1;
…
uniform mediump vec4 data26;
…

    float height [101];
    height[0] = data1.x; height[1] = data1.y; height[2] = data1.z; height[3] = data1.w; 
    ...
    int idx = int(position.x);

and then I use idx to get value
it works, but not in webgl

in a theory, I can use texture for this. but not sure if texture fetch will work in vertex shader on mobile or web.

#5

Here is the result so far:

10 Likes
#6

The way you are doing it may be the best way to do so right now. I tested sending array type table data just to make sure but set_constant expect vector4s only. You should create a feature request for adding array data types via table data for passing array data to shaders.

2 Likes
#7

Created a feature request: DEF-2055

5 Likes
#8

Any updates on this request?