Instance Method

scale(by:)

Scales the entire noise field by the specified x, y, and z factors.

Declaration

func scale(by factor: vector_double3)

Parameters

factor

A vector whose x, y, and z components each provide a scale factor for the corresponding axis in the noise field.

Discussion

A noise field is inherently three-dimensional and infinite in extent; when you create a GKNoiseMap object from a noise object, the resulting array of noise values is a “slice” of the noise field (through its z = 0 plane, with a specified size and position). By translating, rotating, and scaling the noise field in 3D before you create a noise map, you can create interesting effects. For example, applying a non-uniform scale to noise generated by a GKVoronoiNoiseSource object creates patterns similar to water waves.

Figure 1

Example result of the scale operation

See Also

Applying Geometric Transformations

func move(by: vector_double3)

Translates the entire noise field by the specified x, y, and z offsets.

func rotate(by: vector_double3)

Rotates the entire noise field by the specified x, y, and z angles.