// ----- boiler-plate code for vertex shader variable definition

precision mediump float;

attribute vec3 vertex;
attribute vec3 normal;
attribute vec2 texcoord;

uniform mat4 modelviewmatrix[2]; // [0] model movement in real coords, [1] in camera coords
uniform vec3 unib[4];
//uniform float ntiles => unib[0][0]
//uniform vec2 umult, vmult => unib[2]
//uniform vec2 u_off, v_off => unib[3]
uniform vec3 unif[20];
//uniform vec3 eye > unif[6]
//uniform vec3 lightpos > unif[8]
