[Bf-blender-cvs] [74cab3ea05e] microfacet_hair: Cleanup: remove unneeded variable

[Weizhen Huang]

Commit: 74cab3ea05e1dfe437a8265601c067e0318c58eb
Author: Weizhen Huang
Date:   Fri Jan 6 14:26:13 2023 +0100
Branches: microfacet_hair
https://developer.blender.org/rB74cab3ea05e1dfe437a8265601c067e0318c58eb

Cleanup: remove unneeded variable

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M	source/blender/blenkernel/intern/curve_catmull_rom.cc

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diff --git a/source/blender/blenkernel/intern/curve_catmull_rom.cc b/source/blender/blenkernel/intern/curve_catmull_rom.cc
index b7930ade7fc..a93b90ea598 100644
--- a/source/blender/blenkernel/intern/curve_catmull_rom.cc
+++ b/source/blender/blenkernel/intern/curve_catmull_rom.cc
@@ -48,10 +48,9 @@ void calculate_basis_derivative(const float parameter, float4 &r_weights)
 void calculate_basis_derivative2(const float parameter, float4 &r_weights)
 {
   const float t = parameter;
-  const float s = 1.0f - parameter;
   r_weights[0] = -6.0f * t + 4.0f;
   r_weights[1] = 18.0f * t - 10.0f;
-  r_weights[2] = 18.0f * s - 10.0f;
+  r_weights[2] = -18.0f * t + 8.0f;
   r_weights[3] = 6.0f * t - 2.0f;
 }