OGRE_NATIVE_GLSL_VERSION_DIRECTIVE
#include <OgreUnifiedShader.h>

OGRE_UNIFORMS(
uniform vec3 cameraPosition;
)
MAIN_PARAMETERS
IN(vec4 position, POSITION)
IN(vec3 positionWS, TEXCOORD0)
MAIN_DECLARATION
{
	highp float depth = length(positionWS - cameraPosition);
	vec4 depthv = vec4(depth / 256.0, depth / 500.0, depth / 1000.0, 1.0);
	gl_FragColor = depthv;
}