001/*
002Copyright 2006 Jerry Huxtable
003
004Licensed under the Apache License, Version 2.0 (the "License");
005you may not use this file except in compliance with the License.
006You may obtain a copy of the License at
007
008   http://www.apache.org/licenses/LICENSE-2.0
009
010Unless required by applicable law or agreed to in writing, software
011distributed under the License is distributed on an "AS IS" BASIS,
012WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013See the License for the specific language governing permissions and
014limitations under the License.
015*/
016
017package com.jhlabs.math;
018
019public class MathFunction1D implements Function1D {
020
021        public final static int SIN = 1;
022        public final static int COS = 2;
023        public final static int TAN = 3;
024        public final static int SQRT = 4;
025        public final static int ASIN = -1;
026        public final static int ACOS = -2;
027        public final static int ATAN = -3;
028        public final static int SQR = -4;
029
030        private int operation;
031        
032        public MathFunction1D(int operation) {
033                this.operation = operation;
034        }
035        
036        public float evaluate(float v) {
037                switch (operation) {
038                case SIN:
039                        return (float)Math.sin(v);
040                case COS:
041                        return (float)Math.cos(v);
042                case TAN:
043                        return (float)Math.tan(v);
044                case SQRT:
045                        return (float)Math.sqrt(v);
046                case ASIN:
047                        return (float)Math.asin(v);
048                case ACOS:
049                        return (float)Math.acos(v);
050                case ATAN:
051                        return (float)Math.atan(v);
052                case SQR:
053                        return v*v;
054                }
055                return v;
056        }
057}
058