day3 (german!) libs

2015-03-04 09:41:41 +01:00
parent 6b37eb529e
commit e772172cbc
133 changed files with 18241 additions and 0 deletions
@@ -0,0 +1,131 @@
+import mathematik.Vector3f;
+import teilchen.Particle;
+import teilchen.Physics;
+import teilchen.ShortLivedParticle;
+import teilchen.constraint.Box;
+import teilchen.force.Attractor;
+import teilchen.force.Gravity;
+import teilchen.force.ViscousDrag;
+import teilchen.util.ParticleTrail;
+
+import java.util.Vector;
+
+Physics mPhysics;
+
+Vector<ParticleTrail> mTrails;
+
+Attractor mAttractor;
+
+void setup() {
+  size(640, 480, OPENGL);
+  smooth();
+  frameRate(60);
+
+  /* create a particle system */
+  mPhysics = new Physics();
+
+  /* create a gravitational force */
+  Gravity myGravity = new Gravity();
+  mPhysics.add(myGravity);
+  myGravity.force().y = 20;
+
+  /* create drag */
+  ViscousDrag myViscousDrag = new ViscousDrag();
+  myViscousDrag.coefficient = 0.1f;
+  mPhysics.add(myViscousDrag);
+
+  final float mBorder = 40;
+  Box mBox = new Box(new Vector3f(mBorder, mBorder, mBorder), new Vector3f(width - mBorder, height - mBorder, 100 - mBorder));
+  mBox.reflect(true);
+  mPhysics.add(mBox);
+
+  /* create an attractor */
+  mAttractor = new Attractor();
+  mAttractor.radius(200);
+  mAttractor.strength(-300);
+  mPhysics.add(mAttractor);
+
+
+  /* create trails and particles */
+  mTrails = new Vector<ParticleTrail>();
+  for (int i = 0; i < 500; i++) {
+    Particle mParticle = mPhysics.makeParticle();
+    mParticle.mass(2.0f);
+    ParticleTrail myParticleTrail = new ParticleTrail(mPhysics, mParticle, 0.2f, random(0.5f, 1));
+    myParticleTrail.mass(0.5f);
+    mTrails.add(myParticleTrail);
+  }
+  resetParticles(width / 2, height / 2);
+}
+
+void resetParticles(float x, float y) {
+  for (ParticleTrail myTrails : mTrails) {
+    myTrails.particle().position().set(x + random(-10, 10), y + random(-10, 10), 0);
+    myTrails.particle().velocity().set(random(-10, 10), random(-10, 10), random(-10, 10));
+    myTrails.fragments().clear();
+  }
+}
+
+void draw() {
+  /* set attractor to mouse position */
+  mAttractor.position().set(mouseX, mouseY);
+
+  for (ParticleTrail myTrails : mTrails) {
+    myTrails.loop(1f / frameRate);
+  }
+
+  mPhysics.step(1f / frameRate);
+
+  background(255);
+  for (ParticleTrail myTrail : mTrails) {
+    drawTrail(myTrail);
+  }
+}
+
+void drawTrail(ParticleTrail theTrail) {
+
+  final Vector<Particle> mFragments = theTrail.fragments();
+  final Particle mParticle = theTrail.particle();
+
+  /* draw head */
+  if (mFragments.size() > 1) {
+    fill(255, 0, 127);
+    noStroke();
+    pushMatrix();
+    translate(mParticle.position().x, 
+    mParticle.position().y, 
+    mParticle.position().z);
+    sphereDetail(4);
+    sphere(3);
+    popMatrix();
+  }
+
+  /* draw trail */
+  for (int i = 0; i < mFragments.size() - 1; i++) {
+    if (mFragments.get(i) instanceof ShortLivedParticle) {
+      final float mRatio = 1.0f - ((ShortLivedParticle)mFragments.get(i)).ageRatio();
+      stroke(127, mRatio * 255);
+      strokeWeight(mRatio * 3);
+    }
+    int j = (i + 1) % mFragments.size();
+    line(mFragments.get(i).position().x, 
+    mFragments.get(i).position().y, 
+    mFragments.get(i).position().z, 
+    mFragments.get(j).position().x, 
+    mFragments.get(j).position().y, 
+    mFragments.get(j).position().z);
+  }
+  if (!mFragments.isEmpty()) {
+    line(mFragments.lastElement().position().x, 
+    mFragments.lastElement().position().y, 
+    mFragments.lastElement().position().z, 
+    mParticle.position().x, 
+    mParticle.position().y, 
+    mParticle.position().z);
+  }
+}
+
+void mousePressed() {
+  resetParticles(mouseX, mouseY);
+}
+