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Particle Emitter :

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- fixed setNumParticle method to correctly update the mesh buffers
- added a getMaxNumParticle that returns the max number of particles of the emitter
- changed testMovingParticles and testPointSprite to change the numParticle when hitting the space bar

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@7939 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
3.0
rem..om 14 years ago
parent 6c4a84fa92
commit 8f59984d00
5 changed files with 134 additions and 50 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 61
      engine/src/core/com/jme3/effect/ParticleEmitter.java
  2. 33
      engine/src/core/com/jme3/effect/ParticlePointMesh.java
  3. 37
      engine/src/core/com/jme3/effect/ParticleTriMesh.java
  4. 35
      engine/src/test/jme3test/effect/TestMovingParticle.java
  5. 18
      engine/src/test/jme3test/effect/TestPointSprite.java

61
engine/src/core/com/jme3/effect/ParticleEmitter.java
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@ -75,7 +75,6 @@ public class ParticleEmitter extends Geometry {
private static final EmitterShape DEFAULT_SHAPE = new EmitterPointShape(Vector3f.ZERO);
private static final ParticleInfluencer DEFAULT_INFLUENCER = new DefaultParticleInfluencer();
private ParticleEmitterControl control;
private EmitterShape shape = DEFAULT_SHAPE;
private ParticleMesh particleMesh;
@ -110,19 +109,19 @@ public class ParticleEmitter extends Geometry {
public static class ParticleEmitterControl implements Control {
ParticleEmitter parentEmitter;
public ParticleEmitterControl(){
public ParticleEmitterControl() {
}
public ParticleEmitterControl(ParticleEmitter parentEmitter){
public ParticleEmitterControl(ParticleEmitter parentEmitter) {
this.parentEmitter = parentEmitter;
}
public Control cloneForSpatial(Spatial spatial) {
return this; // WARNING: Sets wrong control on spatial. Will be
// fixed automatically by ParticleEmitter.clone() method.
// fixed automatically by ParticleEmitter.clone() method.
}
public void setSpatial(Spatial spatial) {
}
@ -153,21 +152,21 @@ public class ParticleEmitter extends Geometry {
public ParticleEmitter clone() {
ParticleEmitter clone = (ParticleEmitter) super.clone();
clone.shape = shape.deepClone();
// Reinitialize particle list
clone.setNumParticles(particles.length);
clone.faceNormal = faceNormal.clone();
clone.startColor = startColor.clone();
clone.endColor = endColor.clone();
clone.particleInfluencer = particleInfluencer.clone();
// remove wrong control
clone.controls.remove(control);
// put correct control
clone.controls.add(new ParticleEmitterControl(clone));
// Reinitialize particle mesh
switch (meshType) {
case Point:
@ -183,7 +182,7 @@ public class ParticleEmitter extends Geometry {
}
clone.particleMesh.initParticleData(clone, clone.particles.length);
clone.particleMesh.setImagesXY(clone.imagesX, clone.imagesY);
return clone;
}
@ -201,8 +200,8 @@ public class ParticleEmitter extends Geometry {
meshType = type;
this.setNumParticles(numParticles);
// Must create clone of shape/influencer so that a reference to a static is
// not maintained
shape = shape.deepClone();
@ -223,7 +222,8 @@ public class ParticleEmitter extends Geometry {
default:
throw new IllegalStateException("Unrecognized particle type: " + meshType);
}
particleMesh.initParticleData(this, particles.length);
this.setNumParticles(numParticles);
// particleMesh.initParticleData(this, particles.length);
}
/**
@ -330,10 +330,17 @@ public class ParticleEmitter extends Geometry {
for (int i = 0; i < numParticles; i++) {
particles[i] = new Particle();
}
//We have to reinit the mesh's buffers with the new size
particleMesh.initParticleData(this, particles.length);
particleMesh.setImagesXY(this.imagesX, this.imagesY);
firstUnUsed = 0;
lastUsed = -1;
}
public int getMaxNumParticles() {
return particles.length;
}
/**
* Returns a list of all particles (shouldn't be used in most cases).
*
@ -1117,12 +1124,12 @@ public class ParticleEmitter extends Geometry {
super.read(im);
InputCapsule ic = im.getCapsule(this);
shape = (EmitterShape) ic.readSavable("shape", DEFAULT_SHAPE);
if (shape == DEFAULT_SHAPE){
if (shape == DEFAULT_SHAPE) {
// Prevent reference to static
shape = shape.deepClone();
}
meshType = ic.readEnum("meshType", ParticleMesh.Type.class, ParticleMesh.Type.Triangle);
int numParticles = ic.readInt("numParticles", 0);
this.setNumParticles(numParticles);
@ -1161,17 +1168,17 @@ public class ParticleEmitter extends Geometry {
particleMesh.setImagesXY(imagesX, imagesY);
particleInfluencer = (ParticleInfluencer) ic.readSavable("influencer", DEFAULT_INFLUENCER);
if (particleInfluencer == DEFAULT_INFLUENCER){
if (particleInfluencer == DEFAULT_INFLUENCER) {
particleInfluencer = particleInfluencer.clone();
}
if (im.getFormatVersion() == 0){
if (im.getFormatVersion() == 0) {
// compatibility before the control inside particle emitter
// was changed:
// find it in the controls and take it out, then add the proper one in
for (int i = 0; i < controls.size(); i++){
for (int i = 0; i < controls.size(); i++) {
Object obj = controls.get(i);
if (obj instanceof ParticleEmitter){
if (obj instanceof ParticleEmitter) {
controls.remove(i);
// now add the proper one in
controls.add(new ParticleEmitterControl(this));
@ -1180,11 +1187,11 @@ public class ParticleEmitter extends Geometry {
}
// compatability before gravity was not a vector but a float
if (gravity == null){
if (gravity == null) {
gravity = new Vector3f();
gravity.y = ic.readFloat("gravity", 0);
}
}else{
} else {
// since the parentEmitter is not loaded, it must be
// loaded separately
control = getControl(ParticleEmitterControl.class);

33
engine/src/core/com/jme3/effect/ParticlePointMesh.java
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@ -64,26 +64,51 @@ public class ParticlePointMesh extends ParticleMesh {
FloatBuffer pb = BufferUtils.createVector3Buffer(numParticles);
VertexBuffer pvb = new VertexBuffer(VertexBuffer.Type.Position);
pvb.setupData(Usage.Stream, 3, Format.Float, pb);
setBuffer(pvb);
//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);
setBuffer(cvb);
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);
setBuffer(svb);
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);
setBuffer(tvb);
buf = getBuffer(VertexBuffer.Type.TexCoord);
if (buf != null) {
buf.updateData(tb);
} else {
setBuffer(tvb);
}
}
@Override

37
engine/src/core/com/jme3/effect/ParticleTriMesh.java
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@ -66,14 +66,27 @@ public class ParticleTriMesh extends ParticleMesh {
FloatBuffer pb = BufferUtils.createVector3Buffer(numParticles * 4);
VertexBuffer pvb = new VertexBuffer(VertexBuffer.Type.Position);
pvb.setupData(Usage.Stream, 3, Format.Float, pb);
setBuffer(pvb);
//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);
setBuffer(cvb);
buf = getBuffer(VertexBuffer.Type.Color);
if (buf != null) {
buf.updateData(cb);
} else {
setBuffer(cvb);
}
// set texcoords
VertexBuffer tvb = new VertexBuffer(VertexBuffer.Type.TexCoord);
@ -89,7 +102,12 @@ public class ParticleTriMesh extends ParticleMesh {
tb.flip();
tvb.setupData(Usage.Static, 2, Format.Float, tb);
setBuffer(tvb);
buf = getBuffer(VertexBuffer.Type.TexCoord);
if (buf != null) {
buf.updateData(tb);
} else {
setBuffer(tvb);
}
// set indices
ShortBuffer ib = BufferUtils.createShortBuffer(numParticles * 6);
@ -110,9 +128,16 @@ public class ParticleTriMesh extends ParticleMesh {
VertexBuffer ivb = new VertexBuffer(VertexBuffer.Type.Index);
ivb.setupData(Usage.Static, 3, Format.UnsignedShort, ib);
setBuffer(ivb);
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;

35
engine/src/test/jme3test/effect/TestMovingParticle.java
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@ -29,13 +29,16 @@
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package jme3test.effect;
import com.jme3.app.SimpleApplication;
import com.jme3.effect.ParticleEmitter;
import com.jme3.effect.ParticleMesh.Type;
import com.jme3.effect.shapes.EmitterSphereShape;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.InputListener;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.material.Material;
import com.jme3.math.FastMath;
import com.jme3.math.Vector3f;
@ -45,19 +48,19 @@ import com.jme3.math.Vector3f;
*
* @author Kirill Vainer
*/
public class TestMovingParticle extends SimpleApplication {
public class TestMovingParticle extends SimpleApplication {
private ParticleEmitter emit;
private float angle = 0;
public static void main(String[] args){
public static void main(String[] args) {
TestMovingParticle app = new TestMovingParticle();
app.start();
}
@Override
public void simpleInitApp() {
emit = new ParticleEmitter("Emitter", Type.Triangle, 200);
emit = new ParticleEmitter("Emitter", Type.Triangle, 300);
emit.setGravity(0, 0, 0);
emit.setVelocityVariation(1);
emit.setLowLife(1);
@ -67,17 +70,27 @@ public class TestMovingParticle extends SimpleApplication {
Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
mat.setTexture("Texture", assetManager.loadTexture("Effects/Smoke/Smoke.png"));
emit.setMaterial(mat);
rootNode.attachChild(emit);
inputManager.addListener(new ActionListener() {
public void onAction(String name, boolean isPressed, float tpf) {
if ("setNum".equals(name) && isPressed) {
emit.setNumParticles(1000);
}
}
}, "setNum");
inputManager.addMapping("setNum", new KeyTrigger(KeyInput.KEY_SPACE));
}
@Override
public void simpleUpdate(float tpf){
public void simpleUpdate(float tpf) {
angle += tpf;
angle %= FastMath.TWO_PI;
float x = FastMath.cos(angle) * 2;
float y = FastMath.sin(angle) * 2;
emit.setLocalTranslation(x, 0, y);
}
}

18
engine/src/test/jme3test/effect/TestPointSprite.java
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@ -36,6 +36,9 @@ import com.jme3.app.SimpleApplication;
import com.jme3.effect.ParticleEmitter;
import com.jme3.effect.ParticleMesh.Type;
import com.jme3.effect.shapes.EmitterBoxShape;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
@ -49,13 +52,13 @@ public class TestPointSprite extends SimpleApplication {
@Override
public void simpleInitApp() {
ParticleEmitter emit = new ParticleEmitter("Emitter", Type.Point, 10000);
final ParticleEmitter emit = new ParticleEmitter("Emitter", Type.Point, 10000);
emit.setShape(new EmitterBoxShape(new Vector3f(-1.8f, -1.8f, -1.8f),
new Vector3f(1.8f, 1.8f, 1.8f)));
emit.setGravity(0, 0, 0);
emit.setLowLife(60);
emit.setHighLife(60);
emit.setInitialVelocity(new Vector3f(0, 0, 0));
emit.getParticleInfluencer().setInitialVelocity(new Vector3f(0, 0, 0));
emit.setImagesX(15);
emit.setStartSize(0.05f);
emit.setEndSize(0.05f);
@ -70,6 +73,17 @@ public class TestPointSprite extends SimpleApplication {
emit.setMaterial(mat);
rootNode.attachChild(emit);
inputManager.addListener(new ActionListener() {
public void onAction(String name, boolean isPressed, float tpf) {
if ("setNum".equals(name) && isPressed) {
emit.setNumParticles(5000);
emit.emitAllParticles();
}
}
}, "setNum");
inputManager.addMapping("setNum", new KeyTrigger(KeyInput.KEY_SPACE));
}

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