EG/Cesium-1.132/packages/engine/Source/Shaders/Builtin/Constants/passTerrainClassification.glsl

/**
 * The automatic GLSL constant for {@link Pass#TERRAIN_CLASSIFICATION}
 *
 * @name czm_passTerrainClassification
 * @glslConstant
 *
 * @see czm_pass
 */
const float czm_passTerrainClassification = 3.0;