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Balloon.pde

@@ -0,0 +1,85 @@
+class Balloon {
+    float x;
+    float y;
+    float z;
+    float radius;
+    float angle;
+    PVector velocity;
+    PVector acceleration;
+    float lastWindChangeTime;
+
+    Balloon(float x, float y, float z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+        this.radius = 50;
+        this.velocity = new PVector(0, 0, 0);
+        this.acceleration = new PVector(0, 0, 0);
+        this.angle = 0;
+    }
+
+    void applyForce(PVector force) {
+        acceleration.add(force);
+    }
+
+    void applyBuoyancy() {
+        PVector buoyantForce = new PVector(0, 0, buoyancy);
+        applyForce(buoyantForce);
+    }
+
+    void applyDamping() {
+        PVector dampingForce = velocity.copy().mult(-damping);
+        applyForce(dampingForce);
+    }
+
+    void draw() {
+        pushMatrix();
+      
+        if (millis() - lastWindChangeTime > windChangeInterval) {
+            wind = PVector.random3D();
+            wind.mult(20);
+            lastWindChangeTime = millis();
+        }
+
+        rotateX(HALF_PI);
+
+        z += 2;
+
+        translate(x, y, z);
+
+        fill(255, 0, 0);
+        noStroke();
+        sphere(radius);
+        stroke(1);
+
+        drawLeg(-radius / 2, -radius / 2);
+        drawLeg(radius / 2, -radius / 2);
+        drawLeg(-radius / 2, radius / 2);
+        drawLeg(radius / 2, radius / 2);
+
+        translate(0, 0, -75);
+        box(70, 70, 25);
+
+        applyBuoyancy();
+        applyDamping();
+
+        velocity.add(acceleration);
+        x += velocity.x;
+        y += velocity.y;
+        z += velocity.z;
+
+        acceleration.mult(0);
+        angle += 0.01;
+
+        popMatrix();
+    }
+
+    void drawLeg(float x, float y) {
+        pushMatrix();
+        int legHeight = 80;
+        translate(x, y, -legHeight / 2);
+        fill(yellow);
+        box(5, 5, legHeight);
+        popMatrix();
+    }
+}