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Update fbm.glsl #1

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cfccb47
Update fbm.glsl
y-he2 Oct 7, 2025
424aa93
Update fbm.glsl
y-he2 Oct 8, 2025
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16 changes: 8 additions & 8 deletions fbm.glsl
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
// @param timeShift Time shift for each octave, range: [-inf, inf]
// @param gain Gain for each fbm octave, range: [0, 2], default: 0.5
// @param lacunarity Frequency of the fbm, must be integer for tileable results, range: [1, 32]
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param seed Seed to randomize result, range: [0, inf], default: 0.0
// @return value of the noise, range: [0, inf]
float fbm(vec2 pos, vec2 scale, int octaves, float shift, float timeShift, float gain, float lacunarity, float octaveFactor, float seed)
Expand Down Expand Up @@ -42,7 +42,7 @@ float fbm(vec2 pos, vec2 scale, int octaves, float shift, float timeShift, float
// @param gain Gain for each fbm octave, range: [0, 2], default: 0.5
// @param lacunarity Frequency of the fbm, must be integer for tileable results, range: [1, 32], default: 2.0
// @param slopeness Slope intensity of the derivatives, range: [0, 1], default: 0.5
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param seed Seed to randomize result, range: [0, inf], default: 0.0
// @return x = value of the noise, range: [0, inf], yz = derivative of the noise, range: [-1, 1]
vec3 fbmd(vec2 pos, vec2 scale, int octaves, vec2 shift, float timeShift, float gain, vec2 lacunarity, float slopeness, float octaveFactor, float seed)
Expand Down Expand Up @@ -94,7 +94,7 @@ vec3 fbmd(vec2 pos, vec2 scale, int octaves, vec2 shift, float timeShift, float
// @param gain Gain for each fbm octave, range: [0, 2], default: 0.5
// @param lacunarity Frequency of the fbm, must be integer for tileable results, range: [1, 32], default: 2.0
// @param slopeness Slope intensity of the derivatives, range: [0, 1], default: 0.25
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param negative If true use a negative range for the noise values, will result in more contrast, range: [false, true]
// @param seed Seed to randomize result, range: [0, inf], default: 0.0
// @return x = value of the noise, range: [-1, inf], yz = derivative of the noise, range: [-1, 1]
Expand All @@ -111,9 +111,9 @@ vec3 fbmdPerlin(vec2 pos, vec2 scale, int octaves, vec2 shift, mat2 transform, f
for (int i = 0; i < octaves; i++)
{
vec3 n = perlinNoised(p / frequency, frequency, transform, seed);
derivative += n.yz;
n.x = negative ? n.x : n.x * 0.5 + 0.5;
n *= amplitude;
derivative += n.yz; // need the cumulative derivative for following computations
value.x += n.x / (1.0 + mix(0.0, dot(derivative, derivative), slopeness));
value.yz += n.yz;

Expand Down Expand Up @@ -142,7 +142,7 @@ vec3 fbmdPerlin(vec2 pos, vec2 scale, int octaves, vec2 shift, float axialShift,
// @param mode Mode used in combining the noise for the ocatves, range: [0, 5]
// @param factor Pow intensity factor, range: [0, 10], default: 1.0
// @param offset Offsets the value of the noise, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param seed Seed to randomize result, range: [0, inf], default: 0.0
// @return value of the noise, range: [0, inf]
float fbmPerlin(vec2 pos, vec2 scale, int octaves, float shift, float axialShift, float gain, float lacunarity, uint mode, float factor, float offset, float octaveFactor, float seed)
Expand Down Expand Up @@ -200,7 +200,7 @@ float fbmPerlin(vec2 pos, vec2 scale, int octaves, float shift, float axialShift
// @param timeShift Time shift for each octave, range: [-inf, inf]
// @param gain Gain for each fbm octave, range: [0, 2], default: 0.5
// @param lacunarity Frequency of the fbm, must be integer for tileable results, range: [1, 32]
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param jitter Jitter factor for the cells, if zero then it will result in a square grid, range: [0, 1], default: 1.0
// @param interpolate Interpolate factor between the multiplication mode and normal mode, default: 0.0
// @param seed Seed to randomize result, range: [0, inf], default: 0.0
Expand Down Expand Up @@ -245,7 +245,7 @@ vec4 fbmVoronoi(vec2 pos, vec2 scale, int octaves, float shift, float timeShift,
// @param lacunarity Frequency of the fbm, must be integer for tileable results, range: [1, 32]
// @param translate Translate factors for the value noise , range: [-inf, inf], default: {0.5, -0.25, 0.15}
// @param warpStrength The warp factor used for domain warping, range: [-10, 10], default: 0.5
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param seed Seed to randomize result, range: [0, inf], default: 0.0
// @return value of the noise, range: [0, inf]
float fbmGrid(vec2 pos, vec2 scale, int octaves, float shift, float timeShift, float gain, float lacunarity, vec3 translate, float warpStrength, float octaveFactor, float seed)
Expand Down Expand Up @@ -295,7 +295,7 @@ float fbmGrid(vec2 pos, vec2 scale, int octaves, float shift, float timeShift, f
// @param timeShift Time shift for each octave, range: [-inf, inf]
// @param gain Gain for each fbm octave, range: [0, 2], default: 0.5
// @param lacunarity Frequency of the fbm, must be integer for tileable results, range: [1, 32]
// @param octaveFactor The octave intensity factor, the lower the more pronounced the lower octaves will be, range: [-1, 1], default: 0.0
// @param octaveFactor The octave intensity factor, the lower the more pronounced the higher octaves will be, range: [-1, 1], default: 0.0
// @param interpolate Interpolate factor between the multiplication mode and normal mode, default: 0.0
// @param jitter Jitter factor for the cells, if zero then it will result in a square grid, range: [0, 1], default: 1.0
// @param width Width and softness of the metaballs, range: [0, 1], default: {0.1, 0.01}
Expand Down