engine/src/core/com/jme3/effect/ParticleTriMesh.java - platform/external/jmonkeyengine - Git at Google

 /*
  * 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.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.SortUtil;
 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);
         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 * 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 texcoords
         VertexBuffer tvb = new VertexBuffer(VertexBuffer.Type.TexCoord);
         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();
         tvb.setupData(Usage.Static, 2, Format.Float, tb);

         buf = getBuffer(VertexBuffer.Type.TexCoord);
         if (buf != null) {
             buf.updateData(tb);
         } else {
             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();

         VertexBuffer ivb = new VertexBuffer(VertexBuffer.Type.Index);
         ivb.setupData(Usage.Static, 3, Format.UnsignedShort, ib);

         buf = getBuffer(VertexBuffer.Type.Index);
         if (buf != null) {
             buf.updateData(ib);
         } else {
             setBuffer(ivb);
         }

     }

     @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);
             }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 - 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(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);
     }

 }
	/*
	* 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.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.SortUtil;
	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);
	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 * 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 texcoords
	VertexBuffer tvb = new VertexBuffer(VertexBuffer.Type.TexCoord);
	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();
	tvb.setupData(Usage.Static, 2, Format.Float, tb);

	buf = getBuffer(VertexBuffer.Type.TexCoord);
	if (buf != null) {
	buf.updateData(tb);
	} else {
	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();

	VertexBuffer ivb = new VertexBuffer(VertexBuffer.Type.Index);
	ivb.setupData(Usage.Static, 3, Format.UnsignedShort, ib);

	buf = getBuffer(VertexBuffer.Type.Index);
	if (buf != null) {
	buf.updateData(ib);
	} else {
	setBuffer(ivb);
	}

	}

	@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);
	}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 - 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(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);
	}

	}