diff options
Diffstat (limited to 'source/blender/blenlib')
-rw-r--r-- | source/blender/blenlib/intern/noise.cc | 68 |
1 files changed, 40 insertions, 28 deletions
diff --git a/source/blender/blenlib/intern/noise.cc b/source/blender/blenlib/intern/noise.cc index 9f8bcfd2473..8a073239b31 100644 --- a/source/blender/blenlib/intern/noise.cc +++ b/source/blender/blenlib/intern/noise.cc @@ -808,15 +808,14 @@ float musgrave_hybrid_multi_fractal(const float co, { float p = co; const float pwHL = std::pow(lacunarity, -H); - float pwr = pwHL; - float value = perlin_signed(p) + offset; - float weight = gain * value; - p *= lacunarity; + float pwr = 1.0f; + float value = 0.0f; + float weight = 1.0f; const float octaves = CLAMPIS(octaves_unclamped, 0.0f, 15.0f); - for (int i = 1; (weight > 0.001f) && (i < (int)octaves); i++) { + for (int i = 0; (weight > 0.001f) && (i < (int)octaves); i++) { if (weight > 1.0f) { weight = 1.0f; } @@ -829,8 +828,12 @@ float musgrave_hybrid_multi_fractal(const float co, } const float rmd = octaves - floorf(octaves); - if (rmd != 0.0f) { - value += rmd * ((perlin_signed(p) + offset) * pwr); + if ((rmd != 0.0f) && (weight > 0.001f)) { + if (weight > 1.0f) { + weight = 1.0f; + } + float signal = (perlin_signed(p) + offset) * pwr; + value += rmd * weight * signal; } return value; @@ -960,15 +963,14 @@ float musgrave_hybrid_multi_fractal(const float2 co, { float2 p = co; const float pwHL = std::pow(lacunarity, -H); - float pwr = pwHL; - float value = perlin_signed(p) + offset; - float weight = gain * value; - p *= lacunarity; + float pwr = 1.0f; + float value = 0.0f; + float weight = 1.0f; const float octaves = CLAMPIS(octaves_unclamped, 0.0f, 15.0f); - for (int i = 1; (weight > 0.001f) && (i < (int)octaves); i++) { + for (int i = 0; (weight > 0.001f) && (i < (int)octaves); i++) { if (weight > 1.0f) { weight = 1.0f; } @@ -981,8 +983,12 @@ float musgrave_hybrid_multi_fractal(const float2 co, } const float rmd = octaves - floorf(octaves); - if (rmd != 0.0f) { - value += rmd * ((perlin_signed(p) + offset) * pwr); + if ((rmd != 0.0f) && (weight > 0.001f)) { + if (weight > 1.0f) { + weight = 1.0f; + } + float signal = (perlin_signed(p) + offset) * pwr; + value += rmd * weight * signal; } return value; @@ -1114,15 +1120,14 @@ float musgrave_hybrid_multi_fractal(const float3 co, { float3 p = co; const float pwHL = std::pow(lacunarity, -H); - float pwr = pwHL; - float value = perlin_signed(p) + offset; - float weight = gain * value; - p *= lacunarity; + float pwr = 1.0f; + float value = 0.0f; + float weight = 1.0f; const float octaves = CLAMPIS(octaves_unclamped, 0.0f, 15.0f); - for (int i = 1; (weight > 0.001f) && (i < (int)octaves); i++) { + for (int i = 0; (weight > 0.001f) && (i < (int)octaves); i++) { if (weight > 1.0f) { weight = 1.0f; } @@ -1135,8 +1140,12 @@ float musgrave_hybrid_multi_fractal(const float3 co, } const float rmd = octaves - floorf(octaves); - if (rmd != 0.0f) { - value += rmd * ((perlin_signed(p) + offset) * pwr); + if ((rmd != 0.0f) && (weight > 0.001f)) { + if (weight > 1.0f) { + weight = 1.0f; + } + float signal = (perlin_signed(p) + offset) * pwr; + value += rmd * weight * signal; } return value; @@ -1268,15 +1277,14 @@ float musgrave_hybrid_multi_fractal(const float4 co, { float4 p = co; const float pwHL = std::pow(lacunarity, -H); - float pwr = pwHL; - float value = perlin_signed(p) + offset; - float weight = gain * value; - p *= lacunarity; + float pwr = 1.0f; + float value = 0.0f; + float weight = 1.0f; const float octaves = CLAMPIS(octaves_unclamped, 0.0f, 15.0f); - for (int i = 1; (weight > 0.001f) && (i < (int)octaves); i++) { + for (int i = 0; (weight > 0.001f) && (i < (int)octaves); i++) { if (weight > 1.0f) { weight = 1.0f; } @@ -1289,8 +1297,12 @@ float musgrave_hybrid_multi_fractal(const float4 co, } const float rmd = octaves - floorf(octaves); - if (rmd != 0.0f) { - value += rmd * ((perlin_signed(p) + offset) * pwr); + if ((rmd != 0.0f) && (weight > 0.001f)) { + if (weight > 1.0f) { + weight = 1.0f; + } + float signal = (perlin_signed(p) + offset) * pwr; + value += rmd * weight * signal; } return value; |