LightSourceType() 光源类型 Members staticconstantSuperMap3D.LightSourceType.DIRECTIONAL : Number 平行光,枚举值0 staticconstantSuperMap3D.LightSourceType.POINT : Number 点光源,枚举值1 staticconstantSuperMap3D.LightSourceType.SPOT : Number 聚光灯,枚举值2