/*
* Copyright 2014 MovingBlocks
*
* 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.
*/
package org.terasology.entitySystem.event;
import gnu.trove.iterator.TFloatIterator;
import gnu.trove.list.TFloatList;
import gnu.trove.list.array.TFloatArrayList;
/**
* @author Marcin Sciesinski <marcins78@gmail.com>
*/
public abstract class AbstractValueModifiableEvent implements Event {
private float baseValue;
private TFloatList modifiers = new TFloatArrayList();
private TFloatList multipliers = new TFloatArrayList();
private TFloatList postModifiers = new TFloatArrayList();
protected AbstractValueModifiableEvent(float baseValue) {
this.baseValue = baseValue;
}
public float getBaseValue() {
return baseValue;
}
public void multiply(float amount) {
this.multipliers.add(amount);
}
public void add(float amount) {
modifiers.add(amount);
}
public void addPostMultiply(float amount) {
postModifiers.add(amount);
}
public float getResultValue() {
// For now, add all modifiers and multiply by all multipliers. Negative modifiers cap to zero, but negative
// multipliers remain.
float result = baseValue;
TFloatIterator modifierIter = modifiers.iterator();
while (modifierIter.hasNext()) {
result += modifierIter.next();
}
result = Math.max(0, result);
TFloatIterator multiplierIter = multipliers.iterator();
while (multiplierIter.hasNext()) {
result *= multiplierIter.next();
}
final TFloatIterator postModifierIter = postModifiers.iterator();
while (postModifierIter.hasNext()) {
result += postModifierIter.next();
}
return result;
}
}