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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.effect;
import com.jme3.math.Matrix3f;
import com.jme3.renderer.Camera;
import com.jme3.scene.VertexBuffer;
import com.jme3.scene.VertexBuffer.Format;
import com.jme3.scene.VertexBuffer.Usage;
import com.jme3.util.BufferUtils;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
public class ParticlePointMesh extends ParticleMesh {
private ParticleEmitter emitter;
private int imagesX = 1;
private int imagesY = 1;
@Override
public void setImagesXY(int imagesX, int imagesY) {
this.imagesX = imagesX;
this.imagesY = imagesY;
}
@Override
public void initParticleData(ParticleEmitter emitter, int numParticles) {
setMode(Mode.Points);
this.emitter = emitter;
// set positions
FloatBuffer pb = BufferUtils.createVector3Buffer(numParticles);
VertexBuffer pvb = new VertexBuffer(VertexBuffer.Type.Position);
pvb.setupData(Usage.Stream, 3, Format.Float, pb);
//if the buffer is already set only update the data
VertexBuffer buf = getBuffer(VertexBuffer.Type.Position);
if (buf != null) {
buf.updateData(pb);
} else {
setBuffer(pvb);
}
// set colors
ByteBuffer cb = BufferUtils.createByteBuffer(numParticles * 4);
VertexBuffer cvb = new VertexBuffer(VertexBuffer.Type.Color);
cvb.setupData(Usage.Stream, 4, Format.UnsignedByte, cb);
cvb.setNormalized(true);
buf = getBuffer(VertexBuffer.Type.Color);
if (buf != null) {
buf.updateData(cb);
} else {
setBuffer(cvb);
}
// set sizes
FloatBuffer sb = BufferUtils.createFloatBuffer(numParticles);
VertexBuffer svb = new VertexBuffer(VertexBuffer.Type.Size);
svb.setupData(Usage.Stream, 1, Format.Float, sb);
buf = getBuffer(VertexBuffer.Type.Size);
if (buf != null) {
buf.updateData(sb);
} else {
setBuffer(svb);
}
// set UV-scale
FloatBuffer tb = BufferUtils.createFloatBuffer(numParticles*4);
VertexBuffer tvb = new VertexBuffer(VertexBuffer.Type.TexCoord);
tvb.setupData(Usage.Stream, 4, Format.Float, tb);
buf = getBuffer(VertexBuffer.Type.TexCoord);
if (buf != null) {
buf.updateData(tb);
} else {
setBuffer(tvb);
}
}
@Override
public void updateParticleData(Particle[] particles, Camera cam, Matrix3f inverseRotation) {
VertexBuffer pvb = getBuffer(VertexBuffer.Type.Position);
FloatBuffer positions = (FloatBuffer) pvb.getData();
VertexBuffer cvb = getBuffer(VertexBuffer.Type.Color);
ByteBuffer colors = (ByteBuffer) cvb.getData();
VertexBuffer svb = getBuffer(VertexBuffer.Type.Size);
FloatBuffer sizes = (FloatBuffer) svb.getData();
VertexBuffer tvb = getBuffer(VertexBuffer.Type.TexCoord);
FloatBuffer texcoords = (FloatBuffer) tvb.getData();
float sizeScale = emitter.getWorldScale().x;
// update data in vertex buffers
positions.rewind();
colors.rewind();
sizes.rewind();
texcoords.rewind();
for (int i = 0; i < particles.length; i++){
Particle p = particles[i];
positions.put(p.position.x)
.put(p.position.y)
.put(p.position.z);
sizes.put(p.size * sizeScale);
colors.putInt(p.color.asIntABGR());
int imgX = p.imageIndex % imagesX;
int imgY = (p.imageIndex - imgX) / imagesY;
float startX = ((float) imgX) / imagesX;
float startY = ((float) imgY) / imagesY;
float endX = startX + (1f / imagesX);
float endY = startY + (1f / imagesY);
texcoords.put(startX).put(startY).put(endX).put(endY);
}
positions.flip();
colors.flip();
sizes.flip();
texcoords.flip();
// force renderer to re-send data to GPU
pvb.updateData(positions);
cvb.updateData(colors);
svb.updateData(sizes);
tvb.updateData(texcoords);
}
}
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