DSDSWeb/static/js/Cesium-1.53/Source/Shaders/Builtin/Constants/passCesium3DTile.glsl

/**
 * The automatic GLSL constant for {@link Pass#CESIUM_3D_TILE}
 *
 * @name czm_passCesium3DTile
 * @glslConstant
 *
 * @see czm_pass
 */
const float czm_passCesium3DTile = 4.0;