day3 (german!) libs

2015-03-04 09:41:41 +01:00
parent 6b37eb529e
commit e772172cbc
133 changed files with 18241 additions and 0 deletions
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+import processing.opengl.*;
+
+import mathematik.*;
+
+import teilchen.Particle;
+import teilchen.Physics;
+import teilchen.ShortLivedParticle;
+import teilchen.force.Gravity;
+import teilchen.force.PlaneDeflector;
+import teilchen.force.ViscousDrag;
+
+/**
+ * this sketch shows
+ * 1 how to create and use plane deflectors
+ * 2 how to use 'ShortLivedParticle'
+ */
+
+Physics mPhysics;
+
+PlaneDeflector mDeflector;
+
+void setup() {
+  size(640, 480, OPENGL);
+  smooth();
+  frameRate(30);
+
+  /* create a particle system */
+  mPhysics = new Physics();
+
+  /* create a deflector and add it to the particle system.
+   * the that defines the deflection area is defined by an
+   * origin and a normal. this also means that the plane s size
+   * is infinite.
+   * note that there is also a triangle delfector that is constraint
+   * by three points.
+   */
+  mDeflector = new PlaneDeflector();
+  /* set plane origin into the center of the screen */
+  mDeflector.plane().origin.set(width / 2, height / 2, 0);
+  mDeflector.plane().normal.set(0, -1, 0);
+  /* the coefficient of restitution defines how hard particles bounce of the deflector */
+  mDeflector.coefficientofrestitution(0.7f);
+  mPhysics.add(mDeflector);
+
+  /* create gravitiy */
+  Gravity myGravity = new Gravity();
+  myGravity.force().y = 50;
+  mPhysics.add(myGravity);
+
+  /* create drag */
+  ViscousDrag myViscousDrag = new ViscousDrag();
+  myViscousDrag.coefficient = 0.1f;
+  mPhysics.add(myViscousDrag);
+}
+
+void draw() {
+  /* rotate deflector plane */
+  if (mousePressed) {
+    final float myAngle = 2 * PI * (float)mouseX / width - PI;
+    mDeflector.plane().normal.set(sin(myAngle), -cos(myAngle), 0);
+  }
+
+  /* create a special particle */
+  ShortLivedParticle myNewParticle = new ShortLivedParticle();
+  myNewParticle.position().set(mouseX, mouseY);
+  myNewParticle.velocity().set(0, random(100) + 50);
+  /*  this particle is removed after a specific interval */
+  myNewParticle.setMaxAge(4);
+  /* add particle manually to the particle system */
+  mPhysics.add(myNewParticle);
+
+  /* update physics */
+  final float mDeltaTime = 1.0 / frameRate;
+  mPhysics.step(mDeltaTime);
+
+  /* draw all the particles in the particle system */
+  background(255);
+  for (int i = 0; i < mPhysics.particles().size(); i++) {
+    Particle myParticle = mPhysics.particles(i);
+    /* this special particle can tell you how much time it has to live.
+     * we map this information to its transparency.
+     */
+    float myRatio = 1 - ((ShortLivedParticle)myParticle).ageRatio();
+    stroke(0, 64 * myRatio);
+    fill(0, 32 * myRatio);
+    ellipse(myParticle.position().x, myParticle.position().y, 12, 12);
+  }
+
+  /* draw deflector */
+  stroke(0, 127);
+  line(mDeflector.plane().origin.x - mDeflector.plane().normal.y * -width,
+  mDeflector.plane().origin.y + mDeflector.plane().normal.x * -width,
+  mDeflector.plane().origin.x - mDeflector.plane().normal.y * width,
+  mDeflector.plane().origin.y + mDeflector.plane().normal.x * width);
+
+  stroke(255, 0, 0, 127);
+  line(mDeflector.plane().origin.x,
+  mDeflector.plane().origin.y,
+  mDeflector.plane().origin.x + mDeflector.plane().normal.x * 20,
+  mDeflector.plane().origin.y + mDeflector.plane().normal.y * 20);
+}
+