Noise Utilities (mathutils.noise)

The Blender noise module

mathutils.noise.cell(position)

Returns cell noise value at the specified position.

Parameters

position (mathutils.Vector) – The position to evaluate the selected noise function at.

Returns

The cell noise value.

Return type

float

mathutils.noise.cell_vector(position)

Returns cell noise vector at the specified position.

Parameters

position (mathutils.Vector) – The position to evaluate the selected noise function at.

Returns

The cell noise vector.

Return type

mathutils.Vector

mathutils.noise.fractal(position, H, lacunarity, octaves, noise_basis=noise.types.STDPERLIN)

Returns the fractal Brownian motion (fBm) noise value from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• H (float) – The fractal increment factor.

• lacunarity (float) – The gap between successive frequencies.

• octaves (int) – The number of different noise frequencies used.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The fractal Brownian motion noise value.

Return type

float

mathutils.noise.hetero_terrain(position, H, lacunarity, octaves, offset, noise_basis=noise.types.STDPERLIN)

Returns the heterogeneous terrain value from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• H (float) – The fractal dimension of the roughest areas.

• lacunarity (float) – The gap between successive frequencies.

• octaves (int) – The number of different noise frequencies used.

• offset (float) – The height of the terrain above ‘sea level’.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The heterogeneous terrain value.

Return type

float

mathutils.noise.hybrid_multi_fractal(position, H, lacunarity, octaves, offset, gain, noise_basis=noise.types.STDPERLIN)

Returns hybrid multifractal value from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• H (float) – The fractal dimension of the roughest areas.

• lacunarity (float) – The gap between successive frequencies.

• octaves (int) – The number of different noise frequencies used.

• offset (float) – The height of the terrain above ‘sea level’.

• gain (float) – Scaling applied to the values.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The hybrid multifractal value.

Return type

float

mathutils.noise.multi_fractal(position, H, lacunarity, octaves, noise_basis=noise.types.STDPERLIN)

Returns multifractal noise value from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• H (float) – The fractal increment factor.

• lacunarity (float) – The gap between successive frequencies.

• octaves (int) – The number of different noise frequencies used.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The multifractal noise value.

Return type

float

mathutils.noise.noise(position, noise_basis=noise.types.STDPERLIN)

Returns noise value from the noise basis at the position specified.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The noise value.

Return type

float

mathutils.noise.noise_vector(position, noise_basis=noise.types.STDPERLIN)

Returns the noise vector from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The noise vector.

Return type

mathutils.Vector

mathutils.noise.random()

Returns a random number in the range [0, 1].

Returns

The random number.

Return type

float

mathutils.noise.random_unit_vector(size=3)

Returns a unit vector with random entries.

Parameters

size (Int) – The size of the vector to be produced.

Returns

The random unit vector.

Return type

mathutils.Vector

mathutils.noise.ridged_multi_fractal(position, H, lacunarity, octaves, offset, gain, noise_basis=noise.types.STDPERLIN)

Returns ridged multifractal value from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• H (float) – The fractal dimension of the roughest areas.

• lacunarity (float) – The gap between successive frequencies.

• octaves (int) – The number of different noise frequencies used.

• offset (float) – The height of the terrain above ‘sea level’.

• gain (float) – Scaling applied to the values.

• noise_basis (Value in noise.types or int) – The type of noise to be evaluated.

Returns

The ridged multifractal value.

Return type

float

mathutils.noise.seed_set(seed)

Sets the random seed used for random_unit_vector, random_vector and random.

Parameters

seed (Int) – Seed used for the random generator. When seed is zero, the current time will be used instead.

mathutils.noise.turbulence(position, octaves, hard, noise_basis=noise.types.STDPERLIN, amplitude_scale=0.5, frequency_scale=2.0)

Returns the turbulence value from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• octaves (int) – The number of different noise frequencies used.

• hard (:boolean) – Specifies whether returned turbulence is hard (sharp transitions) or soft (smooth transitions).

• noise_basis (Value in mathutils.noise.types or int) – The type of noise to be evaluated.

• amplitude_scale (float) – The amplitude scaling factor.

• frequency_scale (Value in noise.types or int) – The frequency scaling factor

Returns

The turbulence value.

Return type

float

mathutils.noise.turbulence_vector(position, octaves, hard, noise_basis=noise.types.STDPERLIN, amplitude_scale=0.5, frequency_scale=2.0)

Returns the turbulence vector from the noise basis at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• octaves (int) – The number of different noise frequencies used.

• hard (:boolean) – Specifies whether returned turbulence is hard (sharp transitions) or soft (smooth transitions).

• noise_basis (Value in mathutils.noise.types or int) – The type of noise to be evaluated.

• amplitude_scale (float) – The amplitude scaling factor.

• frequency_scale (Value in noise.types or int) – The frequency scaling factor

Returns

The turbulence vector.

Return type

mathutils.Vector

mathutils.noise.variable_lacunarity(position, distortion, noise_type1=noise.types.STDPERLIN, noise_type2=noise.types.STDPERLIN)

Returns variable lacunarity noise value, a distorted variety of noise, from noise type 1 distorted by noise type 2 at the specified position.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• distortion (float) – The amount of distortion.

• noise_type1 (Value in noise.types or int) – The type of noise to be distorted.

• noise_type2 (Value in noise.types or int) – The type of noise used to distort noise_type1.

Returns

The variable lacunarity noise value.

Return type

float

mathutils.noise.voronoi(position, distance_metric=noise.distance_metrics.DISTANCE, exponent=2.5)

Returns a list of distances to the four closest features and their locations.

Parameters

• position (mathutils.Vector) – The position to evaluate the selected noise function at.

• distance_metric (Value in noise.distance_metrics or int) – Method of measuring distance.

• exponent (float) – The exponent for Minkowski distance metric.

Returns

A list of distances to the four closest features and their locations.

Return type

list of four floats, list of four mathutils.Vector types