#ifdef GL_ES
precision highp int;
precision highp float;
#endif

#define USE_OGRE_FROM_FUTURE
#include <OgreUnifiedShader.h>

SAMPLER2D(diffuseMap, 0);

OGRE_UNIFORMS(
uniform vec4 cutoutColor;
uniform float minDistance;
uniform float maxDistance;
)

MAIN_PARAMETERS
IN(vec2 oUv0, TEXCOORD0)
MAIN_DECLARATION
{  
    vec4 diffuseTex = texture2D(diffuseMap, oUv0);
    vec4 colorDelta = diffuseTex - cutoutColor;
  
	float distance2 = dot(colorDelta, colorDelta);
	float weight = clamp((distance2 - minDistance) / (maxDistance - minDistance), 0.0, 1.0);
	gl_FragColor = mix(vec4(diffuseTex.rgb, 0.0), diffuseTex, vec4_splat(weight));
}