DebugXXXValues
将具体的数值打印到材质上，数值需为固定值。
PlotFunctionOnGraph
绘制f(x)图像，x为映射范围后的UV.x。
可以自己复制一份修改，把
y=x那条线删掉。
: Cheyne Xie
: https://chaim.eu.org/posts/f433d465/
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