declare const _default: "\nconst float maxCascades = 4.0;\n\n// shadow matrix for selected cascade\nmat4 cascadeShadowMat;\n\n// function which selects a shadow projection matrix based on cascade distances \nvoid getShadowCascadeMatrix(mat4 shadowMatrixPalette[4], float shadowCascadeDistances[4], float shadowCascadeCount) {\n\n    // depth in 0 .. far plane range\n    float depth = 1.0 / gl_FragCoord.w;\n\n    // find cascade index based on the depth (loop as there is no per component vec compare operator in webgl)\n    float cascadeIndex = 0.0;\n    for (float i = 0.0; i < maxCascades; i++) {\n        if (depth < shadowCascadeDistances[int(i)]) {\n            cascadeIndex = i;\n            break;\n        }\n    }\n\n    // limit to actual number of used cascades\n    cascadeIndex = min(cascadeIndex, shadowCascadeCount - 1.0);\n\n    // pick shadow matrix\n    #ifdef GL2\n        cascadeShadowMat = shadowMatrixPalette[int(cascadeIndex)];\n    #else\n        // webgl 1 does not allow non-cost index array lookup\n        if (cascadeIndex == 0.0) {\n            cascadeShadowMat = shadowMatrixPalette[0];\n        }\n        else if (cascadeIndex == 1.0) {\n            cascadeShadowMat = shadowMatrixPalette[1];\n        }\n        else if (cascadeIndex == 2.0) {\n            cascadeShadowMat = shadowMatrixPalette[2];\n        }\n        else {\n            cascadeShadowMat = shadowMatrixPalette[3];\n        }\n    #endif\n}\n\nvoid fadeShadow(float shadowCascadeDistances[4]) {                  \n\n    // if the pixel is past the shadow distance, remove shadow\n    // this enforces straight line instead of corner of shadow which moves when camera rotates  \n    float depth = 1.0 / gl_FragCoord.w;\n    if (depth > shadowCascadeDistances[int(maxCascades - 1.0)]) {\n        dShadowCoord.z = -9999999.0;\n    }\n}\n";
export default _default;