#ifdef GL_ES
#extension GL_OES_texture_3D : enable
precision mediump int;
precision mediump float;
precision mediump sampler3D;
#endif

#define USE_OGRE_FROM_FUTURE
#include <OgreUnifiedShader.h>

SAMPLER2D(RT, 0);
SAMPLER3D(noise, 1);

OGRE_UNIFORMS(
uniform vec2 numTiles;
uniform vec2 iNumTiles;
uniform vec2 iNumTiles2;
uniform vec4 lum;
)

MAIN_PARAMETERS
IN(vec2 oUv0, TEXCOORD0)
MAIN_DECLARATION
{
	vec3 local;
	local.xy = mod(oUv0, iNumTiles);
	vec2 middle = oUv0 - local.xy;
	local.xy = local.xy * numTiles;
	middle += iNumTiles2;
	local.z = dot(texture2D(RT, middle), lum);
	vec4 c = vec4_splat(texture3D(noise, local).r);
	gl_FragColor = c;
}