DSDSWeb/static/js/Cesium-1.53/Source/Shaders/Builtin/Structs/shadowParameters.glsl

struct czm_shadowParameters
{
#ifdef USE_CUBE_MAP_SHADOW
    vec3 texCoords;
#else
    vec2 texCoords;
#endif

    float depthBias;
    float depth;
    float nDotL;
    vec2 texelStepSize;
    float normalShadingSmooth;
    float darkness;
};