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 +1,113 @@
+import processing.opengl.*;
+
+import mathematik.Vector3f;
+
+import teilchen.Particle;
+import teilchen.Physics;
+import teilchen.constraint.IConstraint;
+import teilchen.constraint.Stick;
+import teilchen.force.Attractor;
+import teilchen.force.Gravity;
+import teilchen.integration.Verlet;
+
+
+Physics mPhysics;
+
+Particle[][] mParticles;
+
+final int GRID_WIDTH = 32;
+
+final int GRID_HEIGHT = 16;
+
+Attractor mAttractor;
+
+void setup() {
+  size(640, 480, OPENGL);
+  frameRate(60);
+
+  mPhysics = new Physics();
+  mPhysics.contraint_iterations_per_steps = 5;
+
+  Verlet myVerlet = new Verlet();
+  myVerlet.damping(0.9f);
+  mPhysics.setInegratorRef(myVerlet);
+  mPhysics.add(new Gravity(new Vector3f(0, 1000f, 0)));
+
+  mAttractor = new Attractor();
+  mAttractor.strength(-15000);
+  mAttractor.radius(300);
+  mPhysics.add(mAttractor);
+
+  mParticles = new Particle[GRID_WIDTH][GRID_HEIGHT];
+
+  /* setup cloth */
+  float mGridStepX = ((float)width / GRID_WIDTH);
+  float mGridStepY = (((float)height * 0.5f) / GRID_HEIGHT);
+  for (int y = 0; y < GRID_HEIGHT; y++) {
+    for (int x = 0; x < GRID_WIDTH; x++) {
+      mParticles[x][y] = mPhysics.makeParticle();
+      mParticles[x][y].position().set((x + 0.5f) * mGridStepX,
+      y * mGridStepY,
+      random(0, 1));
+      mParticles[x][y].old_position().set(mParticles[x][y].position());
+      mParticles[x][y].mass(0.1f);
+
+      final float DAMPING = 0.9f;
+      if (y > 0) {
+        Stick myStick = new Stick(mParticles[x][y - 1],
+        mParticles[x][y],
+        mGridStepY);
+        myStick.damping(DAMPING);
+        mPhysics.add(myStick);
+      }
+      if (x > 0) {
+        Stick myStick = new Stick(mParticles[x - 1][y],
+        mParticles[x][y],
+        mGridStepX);
+        myStick.damping(DAMPING);
+        mPhysics.add(myStick);
+      }
+      if (x > 0 && y > 0) {
+        Stick myStick1 = new Stick(mParticles[x - 1][y - 1],
+        mParticles[x][y],
+        new Vector3f(mGridStepX, mGridStepY).length());
+        mPhysics.add(myStick1);
+        Stick myStick2 = new Stick(mParticles[x][y - 1],
+        mParticles[x - 1][y],
+        new Vector3f(mGridStepX, mGridStepY).length());
+        mPhysics.add(myStick2);
+      }
+    }
+  }
+
+  /* fix first row */
+  for (int x = 0; x < mParticles.length; x++) {
+    mParticles[x][0].fixed(true);
+  }
+}
+
+void draw() {
+
+  /* update */
+  mAttractor.position().set(mouseX, mouseY, 50);
+  mPhysics.step(1.0 / frameRate);
+
+  background(255);
+
+  /* draw sticks */
+  stroke(0, 127);
+
+  for (int i = 0; i < mPhysics.constraints().size(); i++) {
+    IConstraint mConstraint = mPhysics.constraints().get(i);
+    if (mConstraint instanceof Stick) {
+      final Stick myStick = (Stick)mConstraint;
+      line(myStick.a().position().x,
+      myStick.a().position().y,
+      myStick.a().position().z,
+      myStick.b().position().x,
+      myStick.b().position().y,
+      myStick.b().position().z);
+    }
+  }
+}
+