uniform sampler2D image;
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uniform float strength;
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uniform vec2 repeat;
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czm_material czm_getMaterial(czm_materialInput materialInput)
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{
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czm_material material = czm_getDefaultMaterial(materialInput);
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vec4 textureValue = texture2D(image, fract(repeat * materialInput.st));
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vec3 normalTangentSpace = textureValue.channels;
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normalTangentSpace.xy = normalTangentSpace.xy * 2.0 - 1.0;
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normalTangentSpace.z = clamp(1.0 - strength, 0.1, 1.0);
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normalTangentSpace = normalize(normalTangentSpace);
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vec3 normalEC = materialInput.tangentToEyeMatrix * normalTangentSpace;
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material.normal = normalEC;
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return material;
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}
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