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Assets/Plugins/UnityURPToonLitShaderExample-master/NiloInvLerpRemap.hlsl

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+// https://github.com/ronja-tutorials/ShaderTutorials/blob/master/Assets/047_InverseInterpolationAndRemap/Interpolation.cginc
+// edit float to half for optimization, because we usually use this to process color data(half)
+
+#ifndef Include_NiloInvLerpRemap
+#define Include_NiloInvLerpRemap
+
+// just like smoothstep(), but linear, not clamped
+half invLerp(half from, half to, half value) 
+{
+    return (value - from) / (to - from);
+}
+half invLerpClamp(half from, half to, half value)
+{
+    return saturate(invLerp(from,to,value));
+}
+// full control remap, but slower
+half remap(half origFrom, half origTo, half targetFrom, half targetTo, half value)
+{
+    half rel = invLerp(origFrom, origTo, value);
+    return lerp(targetFrom, targetTo, rel);
+}
+#endif