在SceneKit中，类型为SCNLightTypeAmbient的SCNLight是否忽略categoryBitMask参数？

Question

好像是的！

这里忽略了categoryBitMask：

ambientLight = [SCNLight light];
ambientLight.color = [UIColor colorWithRed:0.994 green:0.715 blue:0.179 alpha:1.000];
ambientLight.type = SCNLightTypeAmbient;
ambientLight.categoryBitMask = 1;

在这里起作用了！

ambientLight = [SCNLight light];
ambientLight.color = [UIColor colorWithRed:0.994 green:0.715 blue:0.179 alpha:1.000];
ambientLight.type = SCNLightTypeOmni;
ambientLight.categoryBitMask = 1;

Answer 1

没错，环境光的categoryBitMask被忽略了(缺乏文档)。请注意，您可以将材料配置为忽略环境照明：

aMaterial.locksAmbientWithDiffuse = NO;
aMaterial.ambient.contents = blackColor; (the default)