SimplexNoise C# Implementation

If you need to calculate the noise value for a specific coordinate without generating an entire array, use the CalcPixel methods. These return a single float value.

Methods:

• Noise.CalcPixel1D(int x, float scale): Returns the value at index x.
• Noise.CalcPixel2D(int x, int y, float scale): Returns the value at index x, y.
• Noise.CalcPixel3D(int x, int y, int z, float scale): Returns the value at index x, y, z.

// Example 2D pixel access
int x = 10, y = 15;
float scale = 0.10f;
float pixel = Noise.CalcPixel2D(x, y, scale);

The following methods are available in the Noise class for generating noise values in various dimensions and formats.

- Noise.Seed (int) - Arbitrary integer seed
- Noise.Calc1D(int width, float scale) -> float[]
- Noise.Calc2D(int width, int height, float scale) -> float[,]
- Noise.Calc3D(int width, int height, int length, float scale) -> float[,,]
- Noise.CalcPixel1D(int x, float scale) -> float
- Noise.CalcPixel2D(int x, int y, float scale) -> float
- Noise.CalcPixel3D(int x, int y, int z, float scale) -> float

Use Noise.Calc3D to generate a 3D array of Simplex noise values.

Parameters:

• width (int): The number of points to generate in the 1st dimension.
• height (int): The number of points to generate in the 2nd dimension.
• length (int): The number of points to generate in the 3rd dimension.
• scale (float): The scale of the noise. A greater scale results in denser noise.

int width = 10, height = 15, length = 20;
float scale = 0.10f;
float[,,] noise = Noise.Calc3D(width, height, length, scale);

The Noise.Seed property accepts an arbitrary integer to generate the internal lookup table. Setting a specific seed ensures that the generated noise is deterministic (the same seed will always produce the same noise pattern). If not explicitly set, the seed defaults to 0.

Noise.Seed = 123456;

Use Noise.Calc1D to generate a 1D array of Simplex noise values.

Parameters:

• width (int): The number of points to generate.
• scale (float): The scale of the noise. A greater scale results in denser noise.

int width = 10;
float scale = 0.10f;
float[] noise = Noise.Calc1D(width, scale);

Use Noise.Calc2D to generate a 2D array of Simplex noise values.

Parameters:

• width (int): The number of points to generate in the 1st dimension.
• height (int): The number of points to generate in the 2nd dimension.
• scale (float): The scale of the noise. A greater scale results in denser noise.

int width = 10, height = 15;
float scale = 0.10f;
float[,] noise = Noise.Calc2D(width, height, scale);