Posted by imakerobots on Dec 31, 2023; 7:51pm
URL: https://forum.jogamp.org/glDrawArrays-crashes-Java-but-only-on-client-s-machine-tp4043227p4043234.html

We may have found the cause.

in the shader:

glsl#version 330 core

layout(location = 0) in vec3 aPosition;
layout(location = 1) in vec3 aNormal;
layout(location = 2) in vec4 aColor;
layout(location = 3) in vec2 aTexture;

and in the java:

        setupArray(gl,0,3,numVertexes,vertexArray);
        if(hasNormals ) setupArray(gl,1,3,numVertexes,normalArray );
        if(hasColors  ) setupArray(gl,2,4,numVertexes,colorArray  );
        if(hasTextures) setupArray(gl,3,2,numVertexes,textureArray);

made it work.  Previously setupArray() was using

        setupArray(gl,index++,3,numVertexes,vertexArray);
        if(hasNormals ) setupArray(gl,index++,3,numVertexes,normalArray );
        if(hasColors  ) setupArray(gl,index++,4,numVertexes,colorArray  );
        if(hasTextures) setupArray(gl,index++,2,numVertexes,textureArray);

and sometimes the index number didn't match the layout location.