noise: Perlin/Simplex noise generators🔗ℹ

This package provides Racket versions of the Perlin and Simplex noise generators.

Development Development of this library is hosted by GitHub at the following project page:

https://github.com/jpverkamp/noise/

1 Installation🔗ℹ

  raco pkg install noise

2 Functions🔗ℹ

3 Examples🔗ℹ

> (require images/flomap racket/flonum noise)

> (define (clamp min max n)     (/ (- n min) (- max min)))

> (define (build-perlin-image w h #:scale [scale 1.0])     (flomap->bitmap      (build-flomap*       3 w h       (lambda (x y)         (define g (clamp -1.0 1.0 (perlin (* scale (/ x w)) (* scale (/ y h)))))         (vector g g g)))))

> (build-perlin-image 256 256 #:scale 10.0)

> (define (build-simplex-image w h #:scale [scale 1.0])     (flomap->bitmap      (build-flomap*       3 w h       (lambda (x y)         (define g (clamp -1.0 1.0 (simplex (* scale (/ x w)) (* scale (/ y h)))))         (vector g g g)))))

> (build-simplex-image 256 256 #:scale 10.0)

> (define (build-colored-simplex-image w h #:scale [scale 1.0])     (flomap->bitmap      (build-flomap*       3 w h       (lambda (x y)         (vector          (clamp -1.0 1.0 (simplex (* scale (/ x w)) (* scale (/ y h)) -1.0))          (clamp -1.0 1.0 (simplex (* scale (/ x w)) (* scale (/ y h))  0.0))          (clamp -1.0 1.0 (simplex (* scale (/ x w)) (* scale (/ y h))  1.0)))))))

> (build-colored-simplex-image 256 256 #:scale 10.0)

4 License🔗ℹ

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License and GNU Lesser General Public License for more details.