foss-mmo/modules/math.scm
2024-05-23 17:51:41 -04:00

34 lines
950 B
Scheme

;;; Copyright (C) 2024 David Thompson <dave@spritely.institute>
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;; http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.
;;; Commentary:
;;;
;;; Helpful math things.
;;;
;;; Code:
(define-module (math)
#:use-module (hoot ffi)
#:export (random pi clamp))
(define-foreign random
"math" "random"
-> f64)
(define pi (* 4.0 (atan 1.0)))
(define (clamp x min max)
(cond ((< x min) min)
((> x max) max)
(else x)))