new PointLight(param) thing/src/objects/PointLight.js, line 39 构造函数 Parameters: Name Type Description param object 初始参数列表 Properties Name Type Description position Array.<number> 灯光位置 color number | string | Array.<number> 光的颜色 intensity number 光的强度 distance number 照射距离 decay number 衰减系数 Members decay :number thing/src/objects/PointLight.js, line 103 衰减系数 distance :number thing/src/objects/PointLight.js, line 91 照射距离