declare const _default: "\nuniform highp sampler2D uSceneDepthMap;\n\n#if defined(SCENE_DEPTHMAP_LINEAR) && defined(SCENE_DEPTHMAP_PACKED)\n    #include \"floatAsUintPS\"\n#endif\n\n#ifndef SCREENSIZE\n    #define SCREENSIZE\n    uniform vec4 screen_size;\n#endif\n\n#ifndef VIEWMATRIX\n    #define VIEWMATRIX\n    uniform mat4 matrix_view;\n#endif\n\n#ifndef LINEARIZE_DEPTH\n    #define LINEARIZE_DEPTH\n    \n    #ifndef CAMERAPLANES\n        #define CAMERAPLANES\n        uniform vec4 camera_params; // x: 1 / camera_far,      y: camera_far,     z: camera_near,        w: is_ortho\n    #endif\n\n    float linearizeDepth(float z) {\n        if (camera_params.w == 0.0)\n            return (camera_params.z * camera_params.y) / (camera_params.y + z * (camera_params.z - camera_params.y));\n        else\n            return camera_params.z + z * (camera_params.y - camera_params.z);\n    }\n#endif\n\nfloat delinearizeDepth(float linearDepth) {\n    if (camera_params.w == 0.0) {\n        return (camera_params.y * (camera_params.z - linearDepth)) / (linearDepth * (camera_params.z - camera_params.y));\n    } else {\n        return (linearDepth - camera_params.z) / (camera_params.y - camera_params.z);\n    }\n}\n\n// Retrieves rendered linear camera depth by UV\nfloat getLinearScreenDepth(vec2 uv) {\n    #ifdef SCENE_DEPTHMAP_LINEAR\n        #ifdef SCENE_DEPTHMAP_PACKED\n\n            // the depth is a float bit-packed into an RGBA8 texel, so it has to be read without\n            // any filtering to keep the individual bytes intact\n            ivec2 texel = ivec2(uv * vec2(textureSize(uSceneDepthMap, 0)));\n            return uint2float(texelFetch(uSceneDepthMap, texel, 0));\n        #elif defined(SCENE_DEPTHMAP_RECIPROCAL)\n\n            // a coverage weighted average of the reciprocals of the depths, inverted back into a\n            // depth. Zero is a pixel nothing was rendered to, which reads as the far clip.\n            float recip = texture2D(uSceneDepthMap, uv).r;\n            return recip > 0.0 ? 1.0 / recip : camera_params.y;\n        #else\n            return texture2D(uSceneDepthMap, uv).r;\n        #endif\n    #else\n        return linearizeDepth(texture2D(uSceneDepthMap, uv).r);\n    #endif\n}\n\n#ifndef VERTEXSHADER\n    // Retrieves rendered linear camera depth under the current pixel\n    float getLinearScreenDepth() {\n        vec2 uv = gl_FragCoord.xy * screen_size.zw;\n        return getLinearScreenDepth(uv);\n    }\n#endif\n\n// Generates linear camera depth for the given world position\nfloat getLinearDepth(vec3 pos) {\n    return -(matrix_view * vec4(pos, 1.0)).z;\n}\n";
export default _default;