39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
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//
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// Created by aurailus on 15/02/19.
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//
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#ifndef ZEUS_INTERPOLATION_H
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#define ZEUS_INTERPOLATION_H
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class Interp {
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public:
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static inline float lerp(float p0, float p1, float factor) {
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return p0 + factor * (p1 - p0);
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}
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static inline float bilerp(float x0z0, float x1z0, float x0z1, float x1z1, float xfactor, float zfactor) {
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auto p0 = (x0z0 + xfactor * (x1z0 - x0z0));
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auto p1 = (x0z1 + xfactor * (x1z1 - x0z1));
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return p0 + zfactor * (p1 - p0);
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}
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static inline float trilerp(float p000, float p100, float p001, float p101,
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float p010, float p110, float p011, float p111,
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float xfactor, float zfactor, float yfactor) {
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auto p00 = (p000 + xfactor * (p100 - p000));
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auto p10 = (p001 + xfactor * (p101 - p001));
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auto p01 = (p010 + xfactor * (p110 - p010));
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auto p11 = (p011 + xfactor * (p111 - p011));
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auto bl = (p00 + zfactor * (p10 - p00));
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auto tl = (p01 + zfactor * (p11 - p01));
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return bl + yfactor * (tl - bl);
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}
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};
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#endif //ZEUS_INTERPOLATION_H
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