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jMonkeyEngine is a 3-D game engine for adventurous Java developers
/*
* Copyright (c) 2009-2012 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.FastMath;
import com.jme3.math.Matrix3f;
import com.jme3.math.Vector3f;
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 com.jme3.util.TempVars;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;
public class ParticleTriMesh extends ParticleMesh {
private int imagesX = 1;
private int imagesY = 1;
private boolean uniqueTexCoords = false;
// private ParticleComparator comparator = new ParticleComparator();
private ParticleEmitter emitter;
// private Particle[] particlesCopy;
@Override
public void initParticleData(ParticleEmitter emitter, int numParticles) {
setMode(Mode.Triangles);
this.emitter = emitter;
// particlesCopy = new Particle[numParticles];
// set positions
FloatBuffer pb = BufferUtils.createVector3Buffer(numParticles * 4);
// if the buffer is already set only update the data
VertexBuffer buf = getBuffer(VertexBuffer.Type.Position);
if (buf != null) {
buf.updateData(pb);
} else {
VertexBuffer pvb = new VertexBuffer(VertexBuffer.Type.Position);
pvb.setupData(Usage.Stream, 3, Format.Float, pb);
setBuffer(pvb);
}
// set colors
ByteBuffer cb = BufferUtils.createByteBuffer(numParticles * 4 * 4);
buf = getBuffer(VertexBuffer.Type.Color);
if (buf != null) {
buf.updateData(cb);
} else {
VertexBuffer cvb = new VertexBuffer(VertexBuffer.Type.Color);
cvb.setupData(Usage.Stream, 4, Format.UnsignedByte, cb);
cvb.setNormalized(true);
setBuffer(cvb);
}
// set texcoords
FloatBuffer tb = BufferUtils.createVector2Buffer(numParticles * 4);
uniqueTexCoords = false;
for (int i = 0; i < numParticles; i++) {
tb.put(0f).put(1f);
tb.put(1f).put(1f);
tb.put(0f).put(0f);
tb.put(1f).put(0f);
}
tb.flip();
buf = getBuffer(VertexBuffer.Type.TexCoord);
if (buf != null) {
buf.updateData(tb);
} else {
VertexBuffer tvb = new VertexBuffer(VertexBuffer.Type.TexCoord);
tvb.setupData(Usage.Static, 2, Format.Float, tb);
setBuffer(tvb);
}
// set indices
ShortBuffer ib = BufferUtils.createShortBuffer(numParticles * 6);
for (int i = 0; i < numParticles; i++) {
int startIdx = (i * 4);
// triangle 1
ib.put((short) (startIdx + 1))
.put((short) (startIdx + 0))
.put((short) (startIdx + 2));
// triangle 2
ib.put((short) (startIdx + 1))
.put((short) (startIdx + 2))
.put((short) (startIdx + 3));
}
ib.flip();
buf = getBuffer(VertexBuffer.Type.Index);
if (buf != null) {
buf.updateData(ib);
} else {
VertexBuffer ivb = new VertexBuffer(VertexBuffer.Type.Index);
ivb.setupData(Usage.Static, 3, Format.UnsignedShort, ib);
setBuffer(ivb);
}
updateCounts();
}
@Override
public void setImagesXY(int imagesX, int imagesY) {
this.imagesX = imagesX;
this.imagesY = imagesY;
if (imagesX != 1 || imagesY != 1) {
uniqueTexCoords = true;
getBuffer(VertexBuffer.Type.TexCoord).setUsage(Usage.Stream);
}
}
@Override
public void updateParticleData(Particle[] particles, Camera cam, Matrix3f inverseRotation) {
// System.arraycopy(particles, 0, particlesCopy, 0, particlesCopy.length);
// comparator.setCamera(cam);
// Arrays.sort(particlesCopy, comparator);
// SortUtil.qsort(particlesCopy, comparator);
// SortUtil.msort(particles, particlesCopy, comparator);
// particles = particlesCopy;
VertexBuffer pvb = getBuffer(VertexBuffer.Type.Position);
FloatBuffer positions = (FloatBuffer) pvb.getData();
VertexBuffer cvb = getBuffer(VertexBuffer.Type.Color);
ByteBuffer colors = (ByteBuffer) cvb.getData();
VertexBuffer tvb = getBuffer(VertexBuffer.Type.TexCoord);
FloatBuffer texcoords = (FloatBuffer) tvb.getData();
Vector3f camUp = cam.getUp();
Vector3f camLeft = cam.getLeft();
Vector3f camDir = cam.getDirection();
inverseRotation.multLocal(camUp);
inverseRotation.multLocal(camLeft);
inverseRotation.multLocal(camDir);
boolean facingVelocity = emitter.isFacingVelocity();
Vector3f up = new Vector3f(),
left = new Vector3f();
if (!facingVelocity) {
up.set(camUp);
left.set(camLeft);
}
// update data in vertex buffers
positions.clear();
colors.clear();
texcoords.clear();
Vector3f faceNormal = emitter.getFaceNormal();
for (int i = 0; i < particles.length; i++) {
Particle p = particles[i];
boolean dead = p.life == 0;
if (dead) {
positions.put(0).put(0).put(0);
positions.put(0).put(0).put(0);
positions.put(0).put(0).put(0);
positions.put(0).put(0).put(0);
continue;
}
if (facingVelocity) {
left.set(p.velocity).normalizeLocal();
camDir.cross(left, up);
up.multLocal(p.size);
left.multLocal(p.size);
} else if (faceNormal != null) {
up.set(faceNormal).crossLocal(Vector3f.UNIT_X);
faceNormal.cross(up, left);
up.multLocal(p.size);
left.multLocal(p.size);
if (p.angle != 0) {
TempVars vars = TempVars.get();
vars.vect1.set(faceNormal).normalizeLocal();
vars.quat1.fromAngleNormalAxis(p.angle, vars.vect1);
vars.quat1.multLocal(left);
vars.quat1.multLocal(up);
vars.release();
}
} else if (p.angle != 0) {
float cos = FastMath.cos(p.angle) * p.size;
float sin = FastMath.sin(p.angle) * p.size;
left.x = camLeft.x * cos + camUp.x * sin;
left.y = camLeft.y * cos + camUp.y * sin;
left.z = camLeft.z * cos + camUp.z * sin;
up.x = camLeft.x * -sin + camUp.x * cos;
up.y = camLeft.y * -sin + camUp.y * cos;
up.z = camLeft.z * -sin + camUp.z * cos;
} else {
up.set(camUp);
left.set(camLeft);
up.multLocal(p.size);
left.multLocal(p.size);
}
positions.put(p.position.x + left.x + up.x)
.put(p.position.y + left.y + up.y)
.put(p.position.z + left.z + up.z);
positions.put(p.position.x - left.x + up.x)
.put(p.position.y - left.y + up.y)
.put(p.position.z - left.z + up.z);
positions.put(p.position.x + left.x - up.x)
.put(p.position.y + left.y - up.y)
.put(p.position.z + left.z - up.z);
positions.put(p.position.x - left.x - up.x)
.put(p.position.y - left.y - up.y)
.put(p.position.z - left.z - up.z);
if (uniqueTexCoords) {
int imgX = p.imageIndex % imagesX;
int imgY = p.imageIndex / imagesX;
float startX = ((float) imgX) / imagesX;
float startY = ((float) imgY) / imagesY;
float endX = startX + (1f / imagesX);
float endY = startY + (1f / imagesY);
texcoords.put(startX).put(endY);
texcoords.put(endX).put(endY);
texcoords.put(startX).put(startY);
texcoords.put(endX).put(startY);
}
int abgr = p.color.asIntABGR();
colors.putInt(abgr);
colors.putInt(abgr);
colors.putInt(abgr);
colors.putInt(abgr);
}
positions.clear();
colors.clear();
if (!uniqueTexCoords)
texcoords.clear();
else {
texcoords.clear();
tvb.updateData(texcoords);
}
// force renderer to re-send data to GPU
pvb.updateData(positions);
cvb.updateData(colors);
}
}
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