Noise: Fix interpolation at negative coordinates

diff --git a/src/noise.cpp b/src/noise.cpp
index 8c42be3cffea68c52ebd6dc1202ed510672c02c7..826593474a1f0e7fccb10986e5a5b3687ecbfffc 100644 (file)
--- a/src/noise.cpp
+++ b/src/noise.cpp
@@ -590,8 +590,9 @@ void Noise::gradientMap2D(
                int seed)
 {
        float v00, v01, v10, v11, u, v, orig_u;
-       u32 index, i, j, x0, y0, noisex, noisey;
+       u32 index, i, j, noisex, noisey;
        u32 nlx, nly;
+       s32 x0, y0;
 
        bool eased = np.flags & (NOISE_FLAG_DEFAULTS | NOISE_FLAG_EASED);
        Interp2dFxn interpolate = eased ?
@@ -655,8 +656,9 @@ void Noise::gradientMap3D(
        float v000, v010, v100, v110;
        float v001, v011, v101, v111;
        float u, v, w, orig_u, orig_v;
-       u32 index, i, j, k, x0, y0, z0, noisex, noisey, noisez;
+       u32 index, i, j, k, noisex, noisey, noisez;
        u32 nlx, nly, nlz;
+       s32 x0, y0, z0;
 
        Interp3dFxn interpolate = (np.flags & NOISE_FLAG_EASED) ?
                triLinearInterpolation : triLinearInterpolationNoEase;