Question

JavaScript => public var lightmapIndex: int;
C# => public int lightmapIndex;

Description 描述

The index of the baked lightmap applied to this renderer.
使用该渲染器渲染的烘培光照图索引。

The index refers to the LightmapSettings.lightmaps array. A value of -1 (0xFFFF) means no lightmap has been assigned, which is the default. A value of 0xFFFE is internally used for objects that have their scale in lightmap set to 0; they affect lightmaps, but don't have a lightmap assigned themselves. The index is 16 bits internally and can't be larger than 65533 (0xFFFE).
该索引参考了LightmapSettings.lightmaps数组。值为1(0xFFFF)意味没有高度图被指定，该值是默认值。值为0xFFFE用于物体内部，光照图缩放比例为0；因此表现为已应用了光照贴图，但是并没有光照贴图被指定。

A lightmap is a texture atlas and multiple Renderers can use different portions of the same lightmap.
一个场景可以储存多个光照贴图，并且渲染器可以使用这些光照贴图其中之一。这使得有可能在多个物体使用相同的材质，虽然每个物体可以引用不同的光照贴图或同一光照的不同部分。

See Also: LightmapSettings class, lightmapScaleOffset property, ShaderLab properties.

renderer