com.badlogic.gdx.graphics.g3d.particles.influencers.ScaleInfluencer Maven / Gradle / Ivy
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* Copyright 2011 See AUTHORS file.
*
* 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.
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package com.badlogic.gdx.graphics.g3d.particles.influencers;
import com.badlogic.gdx.graphics.g3d.particles.ParticleChannels;
import com.badlogic.gdx.graphics.g3d.particles.ParticleControllerComponent;
/** It's an {@link Influencer} which controls the scale of the particles.
* @author Inferno */
public class ScaleInfluencer extends SimpleInfluencer {
public ScaleInfluencer () {
super();
valueChannelDescriptor = ParticleChannels.Scale;
}
@Override
public void activateParticles (int startIndex, int count) {
if (value.isRelative()) {
for (int i = startIndex * valueChannel.strideSize, a = startIndex * interpolationChannel.strideSize, c = i + count
* valueChannel.strideSize; i < c; i += valueChannel.strideSize, a += interpolationChannel.strideSize) {
float start = value.newLowValue() * controller.scale.x;
float diff = value.newHighValue() * controller.scale.x;
interpolationChannel.data[a + ParticleChannels.InterpolationStartOffset] = start;
interpolationChannel.data[a + ParticleChannels.InterpolationDiffOffset] = diff;
valueChannel.data[i] = start + diff * value.getScale(0);
}
} else {
for (int i = startIndex * valueChannel.strideSize, a = startIndex * interpolationChannel.strideSize, c = i + count
* valueChannel.strideSize; i < c; i += valueChannel.strideSize, a += interpolationChannel.strideSize) {
float start = value.newLowValue() * controller.scale.x;
float diff = value.newHighValue() * controller.scale.x - start;
interpolationChannel.data[a + ParticleChannels.InterpolationStartOffset] = start;
interpolationChannel.data[a + ParticleChannels.InterpolationDiffOffset] = diff;
valueChannel.data[i] = start + diff * value.getScale(0);
}
}
}
public ScaleInfluencer (ScaleInfluencer scaleInfluencer) {
super(scaleInfluencer);
}
@Override
public ParticleControllerComponent copy () {
return new ScaleInfluencer(this);
}
}