diff options
| -rw-r--r-- | src/noise.cpp | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/src/noise.cpp b/src/noise.cpp index 255d3faee..9c91a6df4 100644 --- a/src/noise.cpp +++ b/src/noise.cpp @@ -503,23 +503,32 @@ void Noise::setOctaves(int octaves) void Noise::resizeNoiseBuf(bool is3d) { - //maximum possible spread value factor + // Maximum possible spread value factor float ofactor = (np.lacunarity > 1.0) ? pow(np.lacunarity, np.octaves - 1) : np.lacunarity; - // noise lattice point count + // Noise lattice point count // (int)(sz * spread * ofactor) is # of lattice points crossed due to length float num_noise_points_x = sx * ofactor / np.spread.X; float num_noise_points_y = sy * ofactor / np.spread.Y; float num_noise_points_z = sz * ofactor / np.spread.Z; - // protect against obviously invalid parameters + // Protect against obviously invalid parameters if (num_noise_points_x > 1000000000.f || - num_noise_points_y > 1000000000.f || - num_noise_points_z > 1000000000.f) + num_noise_points_y > 1000000000.f || + num_noise_points_z > 1000000000.f) throw InvalidNoiseParamsException(); + // Protect against an octave having a spread < 1, causing broken noise values + if (np.spread.X / ofactor < 1.0f || + np.spread.Y / ofactor < 1.0f || + np.spread.Z / ofactor < 1.0f) { + errorstream << "A noise parameter has too many octaves: " + << np.octaves << " octaves" << std::endl; + throw InvalidNoiseParamsException("A noise parameter has too many octaves"); + } + // + 2 for the two initial endpoints // + 1 for potentially crossing a boundary due to offset size_t nlx = (size_t)std::ceil(num_noise_points_x) + 3; |