fixed a serious issue in spectral interpolation (caught by @merlinND)

2020-01-31 12:12:09 +01:00 · 2020-01-31 12:12:09 +01:00 · cfeb7766e7
parent 26355676fa
commit cfeb7766e7
1 changed files with 1 additions and 1 deletions
--- a/src/libcore/spectrum.cpp
+++ b/src/libcore/spectrum.cpp
@ -703,7 +703,7 @@ Float InterpolatedSpectrum::eval(Float lambda) const {
              b  = m_wavelengths[idx1],
              fa = m_values[idx1-1],
              fb = m_values[idx1];
-        return math::lerp((lambda - a) / (b-a), fb, fa);
+        return math::lerp((lambda - a) / (b-a), fa, fb);
    } else if (idx2 == idx1+1) {
        /* Hit a value exactly */
        return m_values[idx1];