instancing.txt

with instanced arrays:

draw_instanced(vertices = 3, instances = 10) {
   outputs_size = instances * vertices * stride
   output = allocate_bo(output_size);
   output_offset = 0;

   for (int i = 0; i < instances; i++) {
      foreach(a, attributes) {
         if (divisor != 0)
            update_attribute_descriptor(a + i / divisor, stride = 0);
         else
            update_attribute_descriptor(a + vertices * i);

         update_attribute_descriptor(gl_VertexID + i * vertices);
         update_attribute_descriptor(gl_InstanceID + i, stride = 0);
         update_varyings(output + output_offset);
         output_offset += vertices * stride;

         vs_cmd_draw(vertices);
         plbu_cmd_draw(vertices);
      }
   }
}