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镜像纹理一次,然后限制到边缘像素。
这实际上是围绕零 UV 坐标镜像纹理,在 [-1..1] 范围之外重复边缘像素值。This mode is called "mirror and clamp to edge" in graphics APIs like Vulkan, Metal and OpenGL.另请参阅:Texture.wrapMode、texture assets。