attribute vec4 a_position;
attribute int a_color;
attribute vec2 a_texCoord0;
uniform mat4 u_projTrans;
varying vec4 v_color;
varying vec2 v_texCoords;

void main()
{
   int ir, ig, ib, ia;
   ir = mod(a_color, 16);
   ig = mod((a_color / 16), 16);
   ib = mod((a_color / (16 * 16)), 16);
   ia = mod((a_color / (16 * 16 * 16)), 16);
   v_color = vec4(float(ir)/15.0, float(ig)/15.0, float(ib)/15.0, 1.0);
   v_color.a = v_color.a * (16.0/15.0);
   v_texCoords = a_texCoord0;
   gl_Position =  u_projTrans * a_position;
}