Library Simplex Noise - Noise Generation in PAWN

Crayder · (This post was last modified: 2019-04-15, 03:51 AM by Kar.)

Simplex Noise Generator!

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Description:

This library basically adds a bunch of noise functions that you can use for various things.

So far I've converted the following functions from C++ to PAWN:

Code:
// Returns a 1D simplex noise

Float:noise1D(Float:x);

// Returns a 2D simplex noise

Float:noise2D(Float:x, Float:y);

// Returns a 3D simplex noise

Float:noise3D(Float:x, Float:y, Float:z);

// Returns a 4D simplex noise

Float:noise4D(Float:x, Float:y, Float:z, Float:w);

// Returns a 1D simplex ridged noise

Float:ridgedNoise1D(Float:x);

// Returns a 2D simplex ridged noise

Float:ridgedNoise2D(Float:x, Float:y);

// Returns a 3D simplex ridged noise

Float:ridgedNoise3D(Float:x, Float:y, Float:z);

// Returns a 4D simplex ridged noise

Float:ridgedNoise4D(Float:x, Float:y, Float:z, Float:w);

// Returns a 1D simplex noise with analytical derivative.

dnoise1D(Float:x, &Float:rx, &Float:ry)

// Returns a 2D simplex noise with analytical derivatives.

dnoise2D(Float:x, Float:y, &Float:rx, &Float:ry, &Float:rz)

// Returns a 3D simplex noise with analytical derivatives.

dnoise3D(Float:x, Float:y, Float:z, &Float:rx, &Float:ry, &Float:rz, &Float:rw)

// Returns a 2D simplex cellular/worley noise

Float:worleyNoise2D(Float:x, Float:y)

// Returns a 3D simplex cellular/worley noise

Float:worleyNoise3D(Float:x, Float:y, Float:z)

// Returns a 2D simplex smooth cellular/worley noise

Float:worleyNoise2D_F(Float:x, Float:y, Float:falloff)

// Returns a 3D simplex smooth cellular/worley noise

Float:worleyNoise3D_F(Float:x, Float:y, Float:z, Float:falloff)

I used parts of this for my forest generator. I generated multiple forests over a 3000 unit radius, so it covers all of SA. It has random clearings, camp areas, and rubbish areas. It also has various trees in their own areas (kind of like biomes), bushes, and rocks;

[Image: plants.bmp]

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Examples:

Code:
main() {

    printf("noise1D: %f", noise1D(-45.1231));

    printf("noise2D: %f", noise2D(-45.1231, 10.9453));

    printf("noise3D: %f", noise3D(-45.1231, 10.9453, 32.3621));

    printf("noise4D: %f", noise4D(-45.1231, 10.9453, 32.3621, 100.6343));

    printf("ridgedNoise1D: %f", ridgedNoise1D(-45.1231));

    printf("ridgedNoise2D: %f", ridgedNoise2D(-45.1231, 10.9453));

    printf("ridgedNoise3D: %f", ridgedNoise3D(-45.1231, 10.9453, 32.3621));

    printf("ridgedNoise4D: %f", ridgedNoise4D(-45.1231, 10.9453, 32.3621, 100.6343));

    new Float:rx, Float:ry, Float:rz, Float:rw;

    dnoise1D(100.5, rx, ry);

    printf("dnoise1D: %f, %f", rx, ry);

    dnoise2D(110.53, -20.5, rx, ry, rz);

    printf("dnoise2D: %f, %f, %f", rx, ry, rz);

    dnoise3D(110.53, -20.85, 9.12, rx, ry, rz, rw);

    printf("dnoise3D: %f, %f, %f, %f", rx, ry, rz, rw);

    printf("worleyNoise2D: %f", worleyNoise2D(13.0, -34.1));

    printf("worleyNoise3D: %f", worleyNoise3D(13.52321, -34.1, -34.4));

    printf("worleyNoise2D_F: %f", worleyNoise2D_F(13.0, -34.1, 10.0));

    printf("worleyNoise3D_F: %f", worleyNoise3D_F(13.52321, -34.1, -34.4, 10.0));

}

Output:

Quote:noise1D: 0.117055
noise2D: -0.613689
noise3D: 0.060025
noise4D: -0.237536
ridgedNoise1D: 0.882944
ridgedNoise2D: 0.386310
ridgedNoise3D: 0.939974
ridgedNoise4D: 0.762463
dnoise1D: -0.875976, 9.531250
dnoise2D: 0.325981, -2.015559, -1.042779
dnoise3D: -0.662052, 1.085515, 0.660695, 1.227718
worleyNoise2D: 0.640313
worleyNoise3D: 0.412964
worleyNoise2D_F: 0.238459
worleyNoise3D_F: 0.173266

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Credits:

simongeilfus for the original library in C++ : https://github.com/simongeilfus/SimplexNoise
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Downloads:

https://github.com/Crayder/SimplexNoise

**Markski** · 2019-04-16, 08:31 PM

This is genuinely impressive. I never saw this sort of procedural generation put in practice in SA-MP before.