/*
JWildfire - an image and animation processor written in Java
Copyright (C) 1995-2011 Andreas Maschke
This 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 2.1 of the
License, or (at your option) any later version.
This software 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this software;
if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jwildfire.base.mathparser;
import org.nfunk.jep.JEP;
import org.nfunk.jep.Node;
public class JEPWrapper {
private final JEP parser;
public JEPWrapper() {
parser = new JEP();
parser.addStandardConstants();
parser.addStandardFunctions();
parser.addFunction("rect", new Rect());
parser.addFunction("sawtooth", new Sawtooth());
parser.addFunction("triangle", new Triangle());
}
public void addVariable(String pName, double pValue) {
parser.addVariable(pName, pValue);
}
public void setVarValue(String pName, double pValue) {
parser.setVarValue(pName, pValue);
}
public Node parse(String pExpression) {
try {
return parser.parse(pExpression);
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public double evaluate(Node pNode) {
try {
return (Double) parser.evaluate(pNode);
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
}