Move source code examples to Antora examples directoryantora

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>

1 files changed, 136 insertions, 0 deletions

diff --git a/docs/modules/ROOT/examples/spacewar/Display2.java b/docs/modules/ROOT/examples/spacewar/Display2.java
new file mode 100644
index 000000000..0430a1cc5
--- /dev/null
+++ b/docs/modules/ROOT/examples/spacewar/Display2.java
@@ -0,0 +1,136 @@
+/*
+
+Copyright (c) Xerox Corporation 1998-2002.  All rights reserved.
+
+Use and copying of this software and preparation of derivative works based
+upon this software are permitted.  Any distribution of this software or
+derivative works must comply with all applicable United States export control
+laws.
+
+This software is made available AS IS, and Xerox Corporation makes no warranty
+about the software, its performance or its conformity to any specification.
+
+|<---            this code is formatted to fit into 80 columns             --->|
+|<---            this code is formatted to fit into 80 columns             --->|
+|<---            this code is formatted to fit into 80 columns             --->|
+
+
+Display2.java
+Part of the Spacewar system.
+*/
+
+package spacewar;
+
+
+import java.awt.Graphics;
+import java.awt.Color;
+
+
+/**
+ * This is the cheap Display aspect.
+ */
+class Display2 extends Display {
+
+    Display2(Game game) {
+        super(game);
+        frame.setLocation(540, 20);
+    }
+
+    void noticeSizeChange() {
+        super.noticeSizeChange();
+        setBackground(Color.darkGray);
+    }
+
+    void paintObjects(Graphics g) {
+        SpaceObject[] objects = game.getRegistry().getObjects();
+        final int len = objects.length;
+        for (int i = 0; i < len; i++) {
+            objects[i].paint(g);
+        }
+    }
+
+    static aspect SpaceObjectPainting {
+
+        abstract private void SpaceObject.paint(Graphics g);
+
+        /*
+         * Ships are by far and away the most complex of the space Objects
+         * to paint.
+         */
+        private Color Ship.color;
+
+        after(Pilot pilot) returning (Ship ship): call(Ship Game.newShip(Pilot)) && args(pilot) {
+            if (pilot.getNumber() == 1)
+                ship.color = Color.white;
+            else if (pilot.getNumber() == 2)
+                ship.color = Color.gray;
+            else
+                ship.color = new Color(0xa00000);
+        }
+
+        private void Ship.paint(Graphics g) {
+            if (this.getDamage() < this.MAX_DAMAGE) {
+                double x        = this.getXPos();
+                double y        = this.getYPos();
+                double sinTheta = Math.sin(this.getOrientation());
+                double cosTheta = Math.cos(this.getOrientation());
+
+                g.setColor(color);
+                g.drawLine((int)(x + 8*cosTheta), (int)(y + 8*sinTheta),
+                           (int)(x - 8*cosTheta), (int)(y - 8*sinTheta));
+
+                // if the ship is accelerating, draw thruster
+                if (this.getRAcc() != 0) {
+                    g.setColor(Color.red);
+                    g.fillOval((int)(x - 8*cosTheta), (int)(y - 8*sinTheta), 6, 6);
+                }
+            }
+        }
+
+        private void Bullet.paint(Graphics g) {
+            g.setColor(Color.green);
+            g.fillOval((int)this.getXPos() - 1,
+                       (int)this.getYPos() - 1,
+                       3,
+                       3);
+        }
+
+        private void EnergyPacket.paint(Graphics g) {
+            g.setColor(Color.white);
+            g.fillOval((int)this.getXPos() - 5,
+                       (int)this.getYPos() - 5,
+                       10,
+                       10);
+        }
+    }
+
+    void paintStatus(Graphics g) {
+        int left1 = 60;
+        int top1  = 0;
+
+        int left2 = 200;
+        int top2  = 0;
+
+        g.setColor(Color.white);
+        g.drawString("energy:", 5, top1 + 15);
+        g.drawString("damage:", 5, top1 + 30);
+
+        if (getPilot1() != null)
+            paintLevels(g, getPilot1().getShip(), top1, left1);
+        if (getPilot2() != null)
+            paintLevels(g, getPilot2().getShip(), top2, left2);
+    }
+
+    void paintLevels(Graphics g, Ship ship, int top, int left) {
+        if (ship == null)
+            return;
+        else if (ship.isAlive()) {
+            g.drawString(Float.toString(ship.getEnergyLevel()*100), left+1, top+15);
+            g.drawString(Float.toString(ship.getDamageLevel()*100), left+1, top+30);
+        }
+        else {
+            g.setColor(Color.red);
+            g.drawString("Ship is destroyed", left+1, top+15);
+        }
+    }
+}