Particle Emitter

Author: diwi

examples/testbed/box2d_Cantilever_WeldJoint.java

@@ -16,8 +16,6 @@
 
 import com.thomasdiewald.liquidfun.java.DwWorld;
 
-import java.util.Objects;
-
 import org.jbox2d.collision.shapes.CircleShape;
 import org.jbox2d.collision.shapes.EdgeShape;
 import org.jbox2d.collision.shapes.PolygonShape;

examples/testbed/liquidfun_Scene.java …s/testbed/liquidfun_ParticleEmitter.javaexamples/testbed/liquidfun_Scene.java renamed to examples/testbed/liquidfun_ParticleEmitter.java examples/testbed/liquidfun_Scene.java renamed to examples/testbed/liquidfun_ParticleEmitter.java

@@ -15,33 +15,23 @@
 
 
 import com.thomasdiewald.liquidfun.java.DwWorld;
+import com.thomasdiewald.liquidfun.java.ParticleEmitter;
 import com.thomasdiewald.pixelflow.java.DwPixelFlow;
 import com.thomasdiewald.pixelflow.java.imageprocessing.filter.DwLiquidFX;
-import com.thomasdiewald.pixelflow.java.sampling.DwSampling;
-
-import java.util.Random;
-
-import org.jbox2d.collision.AABB;
-import org.jbox2d.collision.shapes.CircleShape;
 import org.jbox2d.collision.shapes.PolygonShape;
-import org.jbox2d.common.Color3f;
 import org.jbox2d.common.MathUtils;
 import org.jbox2d.common.Vec2;
 import org.jbox2d.dynamics.Body;
 import org.jbox2d.dynamics.BodyDef;
 import org.jbox2d.dynamics.BodyType;
-import org.jbox2d.dynamics.joints.RevoluteJoint;
 import org.jbox2d.dynamics.joints.RevoluteJointDef;
-import org.jbox2d.particle.ParticleColor;
-import org.jbox2d.particle.ParticleDef;
-import org.jbox2d.particle.ParticleGroupDef;
 import org.jbox2d.particle.ParticleType;
 
 import processing.core.*;
 import processing.opengl.PGraphics2D;
 
 
-public class liquidfun_Scene extends PApplet {
+public class liquidfun_ParticleEmitter extends PApplet {
 
   int viewport_w = 1280;
   int viewport_h = 720;
@@ -71,14 +61,11 @@ public void setup(){
     surface.setLocation(viewport_x, viewport_y);
 //    sprite = loadImage("sprite.png");
 
-    
     pixelflow = new DwPixelFlow(this);
     liquidfx = new DwLiquidFX(pixelflow);
 
     pg_particles = (PGraphics2D) createGraphics(width, height, P2D);
 
-    
-    
     reset();
 //    frameRate(1000);
     frameRate(120);
@@ -96,6 +83,7 @@ public void reset(){
 
     world = new DwWorld(this, 20);
 
+    world.setParticleRadius(0.15f);
 //    world.particles.param.falloff_exp1 = 3;
 //    world.particles.param.falloff_exp2 = 1;
 //    world.particles.param.radius_scale = 2;
@@ -113,12 +101,7 @@ public void reset(){
   public void draw(){
 
     if(UPDATE_PHYSICS){
-      wave();
-//      if(frameCount % 2 == 0){
-      for(int i = 0; i < 5; i++){
-        addParticles();
-      }
-//      }
+      addParticles();
       world.update();
     }
 
@@ -146,8 +129,8 @@ public void draw(){
 
       if(APPLY_LIQUID_FX)
       {
-        liquidfx.param.base_LoD = 0;
-        liquidfx.param.base_blur_radius = 2;
+        liquidfx.param.base_LoD = 1;
+        liquidfx.param.base_blur_radius = 1;
         liquidfx.param.base_threshold = 0.7f;
         liquidfx.param.highlight_enabled = true;
         liquidfx.param.highlight_LoD = 1;
@@ -187,26 +170,19 @@ public void keyReleased(){
   }
 
 
-  public void mouseReleased(){
-    Vec2 mworld = new Vec2();
-    world.transform.getScreen2box(mouseX, mouseY, mworld);
-    System.out.println("mouse: "+mouseX+", "+mouseY+", "+mworld);
-  }
+//  public void mouseReleased(){
+//    Vec2 mworld = new Vec2();
+//    world.transform.getScreen2box(mouseX, mouseY, mworld);
+//    System.out.println("mouse: "+mouseX+", "+mouseY+", "+mworld);
+//  }
 
 
   //////////////////////////////////////////////////////////////////////////////
   // Scene Setup
   //////////////////////////////////////////////////////////////////////////////
 
-  RevoluteJoint m_joint;
-  float m_time;
-  
-  
-  public void wave() {
-//    m_time += 1 / 120f;
-//    m_joint.setMotorSpeed(0.1f * MathUtils.cos(m_time) * MathUtils.PI);
-  }
- 
+
+
   public void initScene() {
 
 
@@ -219,32 +195,15 @@ public void initScene() {
     {
       BodyDef bd = new BodyDef();
       ground = world.createBody(bd);
-      
-//      bd.type = BodyType.DYNAMIC;
-//      bd.allowSleep = false;
-//      bd.position.set(0.0f, 0.0f);
-//      Body body = world.createBody(bd);
 
-//      PolygonShape shape = new PolygonShape();
-//      shape.setAsBox(1, 9.5f, new Vec2(19.0f, 0.0f), 0.0f);
-//      body.createFixture(shape, 5.0f);
-//      shape.setAsBox(1, 9.5f, new Vec2(-19.0f, 0.0f), 0.0f);
-//      body.createFixture(shape, 5.0f);
-//      shape.setAsBox(20.0f, 1, new Vec2(0.0f, 11.0f), 0.0f);
-//      body.createFixture(shape, 5.0f);
-//      shape.setAsBox(20.0f, 1, new Vec2(0.0f, -11.0f), 0.0f);
-//      body.createFixture(shape, 5.0f);
-//      world.bodies.add(body, true, color(0), true, color(0), 1f);
-//      
       PolygonShape shape = new PolygonShape();
       shape.setAsBox(dimx/4, thick/2, new Vec2(0, 4), 10 * PI/180);
       ground.createFixture(shape, 0);
 
       shape.setAsBox(dimx/6, thick/2, new Vec2(-20, 8), -15 * PI/180);
       ground.createFixture(shape, 0);
 
-      
-      world.bodies.add(ground, true, color(160), true, color(0), 1f);
+      world.bodies.add(ground, true, color(220), true, color(0), 1f);
     }
 
 
@@ -255,10 +214,10 @@ public void initScene() {
       Body body = world.createBody(bd);
 
       PolygonShape shape = new PolygonShape();
-      shape.setAsBox(0.5f, 5.0f);
+      shape.setAsBox(0.5f, 7.0f);
       body.createFixture(shape, 1);
 
-      shape.setAsBox(5, 0.5f);
+      shape.setAsBox(7, 0.5f);
       body.createFixture(shape, 0.5f);
 
       world.bodies.add(body, true, color(220), true, color(0), 1f);
@@ -272,11 +231,10 @@ public void initScene() {
       jd.motorSpeed = 0.1f * MathUtils.PI;
       jd.maxMotorTorque = 1e7f;
       jd.enableMotor = !true;
-      m_joint = (RevoluteJoint) world.createJoint(jd);
+      world.createJoint(jd);
     }
 
-    
-    
+
     {
       BodyDef bd = new BodyDef();
       bd.type = BodyType.DYNAMIC;
@@ -301,185 +259,54 @@ public void initScene() {
       jd.motorSpeed = -0.2f * MathUtils.PI;
       jd.maxMotorTorque = 1e7f;
       jd.enableMotor = !true;
-      m_joint = (RevoluteJoint) world.createJoint(jd);
+      world.createJoint(jd);
     }
 
-    
-    
-    
-    
-    
-    {
-      BodyDef bd = new BodyDef();
-      bd.type = BodyType.DYNAMIC;
-      bd.position.set(-2,3);
-      Body body = world.createBody(bd);
-    
-      PolygonShape shape = new PolygonShape();
-      shape.setAsBox(0.5f, 8.0f);
-      body.createFixture(shape, 1);
-      
-      shape.setAsBox(8, 0.5f);
-      body.createFixture(shape, 0.5f);
-      
-      world.bodies.add(body, true, color(220), true, color(0), 1f);
-      
-      RevoluteJointDef jd = new RevoluteJointDef();
-      jd.bodyA = ground;
-      jd.bodyB = body;
-      jd.localAnchorA.set(bd.position);
-      jd.localAnchorB.set(0.0f, 0.0f);
-      jd.referenceAngle = 0.0f;
-      jd.motorSpeed = -0.2f * MathUtils.PI;
-      jd.maxMotorTorque = 100000;
-      jd.enableMotor = true;
-      m_joint = (RevoluteJoint) world.createJoint(jd);
-    }
-    
-    
-    
 
-    
-    world.setParticleRadius(0.15f);
-    world.setParticleDamping(0.6f);
 
-    {
-      ParticleGroupDef pgroup_def = new ParticleGroupDef();
-      pgroup_def.flags = ParticleType.b2_waterParticle | ParticleType.b2_viscousParticle;
-      pgroup_def.setColor(new Color3f(1, 0.15f, 0.05f));
-      pgroup_def.linearVelocity.set(0,0);
-      pgroup_def.angularVelocity = 0f;
-      
-      PolygonShape shape = new PolygonShape();
-      shape.setAsBox(17.0f, 9.0f, new Vec2(0.0f, dimy/2), 0.0f);
-
-      pgroup_def.shape = shape;
-      world.createParticleGroup(pgroup_def);
-    }
-
-    m_time = 0;
-    
     int flags = 0;
     flags |= ParticleType.b2_waterParticle;
     flags |= ParticleType.b2_viscousParticle;
 //    flags |= ParticleType.b2_colorMixingParticle;
 
-    emitter0 = new ParticleEmitter(world, 800, 100);
-    emitter0.emit_angle = -170 * TO_RAD;
-    emitter0.emit_velocity = 15;
-    emitter0.pdef.color.set(color(32,255,0));
-    emitter0.pdef.flags = flags;
-    
-    emitter1 = new ParticleEmitter(world, 100, 100);
-    emitter1.emit_angle = 0;
-    emitter1.emit_velocity = 10;
-    emitter1.pdef.color.set(color(255,16,0));
-    emitter1.pdef.flags = flags;
-    
-    emitter2 = new ParticleEmitter(world, 131, 315);
-    emitter2.emit_angle = +40 * TO_RAD;
-    emitter2.emit_velocity = 15;
-    emitter2.pdef.color.set(color(255,64,0));
-    emitter2.pdef.flags = flags;
+    emitter0 = new ParticleEmitter(world, world.transform);
+    emitter1 = new ParticleEmitter(world, world.transform);
+    emitter2 = new ParticleEmitter(world, world.transform);
+    emitter3 = new ParticleEmitter(world, world.transform);
+
+    emitter0.setInScreen( 131, 315, 300,   40, color(255,64,0), flags);
+    emitter1.setInScreen( 100, 100, 300,  -10, color(255,16,0), flags);
+    emitter2.setInScreen(1000, 100, 300, -175, color(32,255,0), flags);
+    emitter3.setInScreen(1200, 400, 300,  140, color(0,64,255), flags);
   }
 
 
   ParticleEmitter emitter0;
   ParticleEmitter emitter1;
   ParticleEmitter emitter2;
-
+  ParticleEmitter emitter3;
+  
   int counter = 0;
   public void addParticles(){
-    if(counter % 2 == 0){
-      emitter0.emitParticles(1);
-      emitter1.emitParticles(1);
-      emitter2.emitParticles(1);
-    }
-    counter++;
-  }
-
-  
-  static final float TO_RAD = (float) (Math.PI / 180.0);
-  
-  
-  
-  
-  static class ParticleEmitter {
-    public PApplet papplet;
-    public DwWorld world;
-
-    public ParticleDef pdef = new ParticleDef();
-    
-    public float emit_angle = (float) (Math.PI * 0.5f);
-    public float emit_velocity = 20;
-    
-    public float mult_jitter_radius = 1.0f; // radius, world-space
-    public float mult_jitter_velmag = 0.5f; // noise mult
-    public float mult_jitter_velrot = 0.2f; // [0, PI*2]
-
-
-    protected Random rand = new Random();
-    protected int counter = 0;
 
-    protected Vec2 emit_pos_screen = new Vec2();
-    protected Vec2 emit_pos_world = new Vec2();
+    emitter2.emit_vel = 25 * (sin(counter/200f) * 0.5f  + 0.5f);
+    emitter3.emit_vel = 25 * (sin(counter/200f) * 0.5f  + 0.5f);
 
-    
-    public ParticleEmitter(DwWorld world, float screen_x, float screen_y){
-      this.papplet = world.papplet;
-      this.world = world;
-      
-      pdef.flags = ParticleType.b2_waterParticle | ParticleType.b2_viscousParticle;
-      pdef.setColor(new Color3f(1, 0.15f, 0.05f));
-      
-      setPosition(screen_x, screen_y);
-    }
-
-    
-    public void emitParticles(int count){
-      for(int i = 0; i < count; i++){
-        emitSingleParticle(i);
-      }
-    }
-
-    public void setPosition(float screen_x, float screen_y){
-      world.transform.getScreen2box(screen_x, screen_y, emit_pos_world);
-    }
-    
-    protected void emitSingleParticle(int idx){
-
-      // velocity (noise)
-      float srandnoise = papplet.noise(counter / 100f) * 2 - 1;
-      
-      float rot_angle = emit_angle     + srandnoise * mult_jitter_velrot;
-      float vel_mag   = emit_velocity  + srandnoise * mult_jitter_velmag;
-      
-      float vel_x = (float) (Math.cos(rot_angle) * vel_mag);
-      float vel_y = (float) (Math.sin(rot_angle) * vel_mag);
-      
-      // position
-      float[] jitter = DwSampling.sampleDisk_Halton(counter, 0.5f);
-
-      float pos_x = emit_pos_world.x + jitter[0] * mult_jitter_radius;
-      float pos_y = emit_pos_world.y + jitter[1] * mult_jitter_radius;
-
-
-      // create Particle
-      pdef.position.set(pos_x, pos_y);
-      pdef.velocity.set(vel_x, vel_y);
-      world.createParticle(pdef);
-      
-      counter++;
+    if(counter % 1 == 0)
+    {
+      emitter0.emitParticles(2);
+      emitter1.emitParticles(2);
+      emitter2.emitParticles(2);
+      emitter3.emitParticles(2);
     }
-    
-    
+    counter++;
   }
 
-
 
 
+
   public static void main(String args[]) {
-    PApplet.main(new String[] { liquidfun_Scene.class.getName() });
+    PApplet.main(new String[] { liquidfun_ParticleEmitter.class.getName() });
   }
 
 }