shaders/vertex_standard.glsl

   1 layout (location=0) in vec3 a_co;
   2 layout (location=1) in vec3 a_norm;
   3 layout (location=2) in vec2 a_uv;
   4 layout (location=3) in vec4 a_colour;
   5 layout (location=4) in vec4 a_weights;
   6 layout (location=5) in ivec4 a_groups;