Viele weitere Beispielprojekt für verschiedene Anwendungen

2026-10-12 09:56:33 +02:00 · 2022-06-19 22:26:01 +02:00
parent dc6b7ee351
commit a2d883305a
97 changed files with 2535 additions and 61 deletions
--- a/examples/zm_boids/Predator.java
+++ b/examples/zm_boids/Predator.java
@@ -0,0 +1,97 @@
+import schule.ngb.zm.DrawingLayer;
+import schule.ngb.zm.Vector;
+
+import java.util.List;
+
+public class Predator extends Creature {
+
+	public static final int SENSE_RADIUS = 180;
+
+	public static final double AVOIDANCE_FACTOR = .65;
+
+	public static final double HUNTING_FACTOR = .65;
+
+	public static final double VELOCITY_LIMIT = 5.0;
+
+	public static final double FORCE_LIMIT = .1;
+
+	public static final int PREDATOR_WIDTH = 12;
+
+	public static final int PREDATOR_HEIGHT = 26;
+
+	public static final boolean SHOW_RADIUS = true;
+
+	public Predator() {
+		// Generate random Predator
+		super(
+			Vector.random(PREDATOR_WIDTH, width - PREDATOR_WIDTH, PREDATOR_HEIGHT, height - PREDATOR_HEIGHT),
+			Vector.random(-1, 1).scale(random(VELOCITY_LIMIT))
+		);
+		senseRange = SENSE_RADIUS;
+	}
+
+	public Predator( Vector pos, Vector vel ) {
+		super(pos, vel);
+		senseRange = SENSE_RADIUS;
+	}
+
+	public void draw( DrawingLayer drawing ) {
+		drawing.setFillColor(152, 61, 83);
+		drawing.setStrokeColor(225, 33, 32);
+		drawing.setStrokeWeight(2);
+
+		drawing.pushMatrix();
+		drawing.translate(position.x, position.y);
+		drawing.rotate(90 + velocity.angle());
+		drawing.triangle(PREDATOR_WIDTH / -2.0, PREDATOR_HEIGHT / 2.0, 0, PREDATOR_HEIGHT / -2.0, PREDATOR_WIDTH / 2.0, PREDATOR_HEIGHT / 2.0);
+
+		if( SHOW_RADIUS ) {
+			drawing.setFillColor(152, 61, 83, 33);
+			drawing.noStroke();
+			drawing.circle(0, 0, SENSE_RADIUS);
+		}
+		drawing.popMatrix();
+	}
+
+	public void update( List<Creature> creatures ) {
+		Vector hunting = new Vector();
+		Vector separation = new Vector();
+		double boids = 0, predators = 0;
+
+		for( Creature c : creatures ) {
+			if( isInRange(c) ) {
+				if( Boid.class.isInstance(c) ) {
+					hunting.add(c.getPosition());
+					boids += 1;
+				} else {
+					double distSq = position.distanceSq(c.getPosition());
+					separation.add(Vector.sub(position, c.getPosition()).div(distSq));
+
+					predators += 1;
+				}
+			}
+		}
+		if( boids > 0 ) {
+			hunting.div(boids).sub(position);
+			hunting.setLength(VELOCITY_LIMIT).sub(velocity);
+			hunting.limit(FORCE_LIMIT);
+			hunting.scale(HUNTING_FACTOR);
+		}
+		if( predators > 0 ) {
+			separation.div(predators);
+			separation.setLength(VELOCITY_LIMIT).sub(velocity);
+			separation.limit(FORCE_LIMIT);
+			separation.scale(AVOIDANCE_FACTOR);
+		}
+
+		acceleration
+			.scale(0.0)
+			.add(hunting)
+			.add(separation);
+
+		position.add(velocity);
+		limitPosition();
+		velocity.add(acceleration).limit(VELOCITY_LIMIT);
+	}
+
+}