获取像素颜色块。
该函数返回纹理的整个 Mip 级别的
像素颜色数组。
返回的数组是一个平展 2D 数组,其中像素是从左到右、
从上到下排列(即,逐行排列)的。数组大小为所用 Mip 级别的宽度乘以高度。
默认 Mip 级别为零(基础纹理),在这种情况下,其大小只是该纹理的大小。
在一般情况下,Mip 级别的大小为 mipWidth=max(1,width>>miplevel)
,
高度也是如此。
使用 GetPixels
可比反复调用 GetPixel 更快,尤其是
对于较大纹理而言。此外,GetPixels
还可访问单独的多级渐进纹理级别。
获取像素颜色块。
该函数是上面的 GetPixels
的扩展版本;它不返回
整个 Mip 级别,而只返回从 x,y 开始的 blockWidth
x blockHeight
区域。
该块受所使用的 Mipmap 级别的大小限制(必须引用 Mipmap 中的像素块)。返回数组的大小为 blockWidth*blockHeight。
注意:对于基于深度数据的 WebCamTexture 实例,此方法通过 Color.r 属性来返回深度值的数组。另请参阅:WebCamTexture.isDepth。
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