Instance Method


Initializes a noise texture that creates random directional noise.


- (instancetype)initVectorNoiseWithSmoothness:(float)smoothness name:(NSString *)name textureDimensions:(vector_int2)textureDimensions channelEncoding:(MDLTextureChannelEncoding)channelEncoding;



A value that indicates how similar neighboring texels will be in the resulting texture. The value should be between 0.0 and 1.0. A value of 1.0 generates a smooth surface.


The name property for the new texture object.


The texel dimensions (width and height) of the texture image.


The data format for each channel value per texel—for example, 8-bit integer or 32-bit floating point. For possible values, see MDLTextureChannelEncoding.

Return Value

A new directional noise texture object.


Unlike a color noise texture, in which the RGBA channels are independently randomized, a directional noise texture treats each texel’s RGB channels together as the XYZ components of a random direction vector, and the A channel as a scalar for the vector’s direction.

This initializer does not generate texel data; the MDLNoiseTexture class automatically generates data and caches it for reuse when you use one of the MDLTexture methods listed in Accessing Texture Data.

See Also

Creating a Noise Texture