Beispielprojekte

examples/zm_forces/Attractor.java

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+
+import schule.ngb.zm.*;
+
+public class Attractor extends Mover {
+
+    private int mass = 0;
+
+    public Attractor( int x, int pY, int pMass ) {
+        this(x, pY, pMass, new Vector());
+    }
+
+    public Attractor( int x, int pY, int pMass, Vector pVelocity ) {
+        super(x, pY, pVelocity);
+        mass = pMass;
+
+        setFillColor(YELLOW);
+    }
+
+    public void attract( Mover pMover ) {
+        if( pMover != this ) {
+            Vector force = new Vector(this.x, this.y);
+            force.sub(pMover.getX(), pMover.getY()).scale(mass*Gravity.G).limit(0, 50*Gravity.G);
+            pMover.applyForce(force);
+        }
+    }
+
+}

examples/zm_forces/Gravity.java

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+
+import java.util.LinkedList;
+
+import schule.ngb.zm.*;
+
+public class Gravity extends Zeichenmaschine {
+    
+    
+    public static final int G = 1;
+    
+    
+    private LinkedList<Mover> movers = new LinkedList<>();
+    
+    private LinkedList<Attractor> attractors = new LinkedList<>();
+    
+    public void setup(){
+         for( int i = 0; i < 10; i++ ) {
+             Mover m = new Mover(random(10, width-10), random(10, height-10));
+             movers.add(m);
+             shapes.add(m);
+         }
+         
+         attractors.add(new Attractor(width/2, height/2, 10));
+         shapes.add(attractors.get(0));
+    }
+    
+    public void update( double delta ) {
+        Attractor mouseFollow = attractors.get(0);
+        mouseFollow.moveTo(mouseX, mouseY);
+        
+        for( Attractor a: attractors ) {
+            for( Mover m: movers ) {
+                a.attract(m);
+            }
+        }
+        
+        for( Mover m: movers ) {
+            m.update(delta);
+        }
+        shapes.clear();
+    }
+    
+    public void mouseClicked() {
+        for( Mover m: movers ) {
+            m.moveTo(random(10, width-10), random(10, height-10));
+            m.setVelocity(0, 0);
+        }
+    }
+    
+}

examples/zm_forces/Mover.java

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+
+import schule.ngb.zm.*;
+import schule.ngb.zm.shapes.*;
+
+public class Mover extends Circle implements Updatable {
+
+    private Vector velocity;
+    private Vector acceleration = new Vector();
+
+    public Mover( int x, int pY ) {
+        this(x, pY, new Vector());
+    }
+
+    public Mover( int x, int pY, Vector pVelocity ) {
+        super(x, pY, 10);
+        this.velocity = pVelocity.copy();
+    }
+    
+    public void setVelocity(double dx, double dy) {
+        velocity.set(dx, dy);
+    }
+
+    public void applyForce( Vector force ) {
+        acceleration.add(force);
+    }
+
+    public boolean isActive() {
+        return true;
+    }
+
+    public void update( double delta ) {
+        acceleration.scale(delta);
+        velocity.add(acceleration);
+        acceleration.scale(0.0);
+
+        this.x += velocity.x;
+        this.y += velocity.y;
+
+
+    }
+
+}

examples/zm_forces/package.bluej

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+#BlueJ package file
+dependency1.from=Attractor
+dependency1.to=Gravity
+dependency1.type=UsesDependency
+dependency2.from=Gravity
+dependency2.to=Mover
+dependency2.type=UsesDependency
+dependency3.from=Gravity
+dependency3.to=Attractor
+dependency3.type=UsesDependency
+editor.fx.0.height=728
+editor.fx.0.width=1037
+editor.fx.0.x=95
+editor.fx.0.y=53
+objectbench.height=94
+objectbench.width=776
+package.divider.horizontal=0.6
+package.divider.vertical=0.8305369127516778
+package.editor.height=488
+package.editor.width=661
+package.editor.x=374
+package.editor.y=158
+package.frame.height=660
+package.frame.width=800
+package.numDependencies=3
+package.numTargets=3
+package.showExtends=true
+package.showUses=true
+project.charset=UTF-8
+readme.height=60
+readme.name=@README
+readme.width=48
+readme.x=10
+readme.y=10
+target1.height=70
+target1.name=Mover
+target1.showInterface=false
+target1.type=ClassTarget
+target1.width=120
+target1.x=380
+target1.y=220
+target2.height=70
+target2.name=Attractor
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=120
+target2.x=380
+target2.y=350
+target3.height=70
+target3.name=Gravity
+target3.showInterface=false
+target3.type=ClassTarget
+target3.width=120
+target3.x=120
+target3.y=120