TornadoSprite.java

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// This file is part of MicropolisJ.
// Copyright (C) 2013 Jason Long
// Portions Copyright (C) 1989-2007 Electronic Arts Inc.
//
// MicropolisJ is free software; you can redistribute it and/or modify
// it under the terms of the GNU GPLv3, with additional terms.
// See the README file, included in this distribution, for details.

package micropolisj.engine;

public class TornadoSprite extends Sprite
{
        static int [] CDx = {  2,  3,  2,  0, -2, -3 };
        static int [] CDy = { -2,  0,  2,  3,  2,  0 };

        boolean flag;
        int count;

        public TornadoSprite(Micropolis engine, int xpos, int ypos)
        {
                super(engine, SpriteKind.TOR);
                this.x = xpos * 16 + 8;
                this.y = ypos * 16 + 8;
                this.width = 48;
                this.height = 48;
                this.offx = -24;
                this.offy = -40;

                this.frame = 1;
                this.count = 200;
        }

        @Override
        public void moveImpl()
        {
                int z = this.frame;

                if (z == 2) {
                        //cycle animation

                        if (this.flag)
                                z = 3;
                        else
                                z = 1;
                }
                else {
                        this.flag = (z == 1);
                        z = 2;
                }

                if (this.count > 0) {
                        this.count--;
                }

                this.frame = z;

                for (Sprite s : city.allSprites()) {
                        if (checkSpriteCollision(s) &&
                                (s.kind == SpriteKind.AIR ||
                                 s.kind == SpriteKind.COP ||
                                 s.kind == SpriteKind.SHI ||
                                 s.kind == SpriteKind.TRA)
                                ) {
                                s.explodeSprite();
                        }
                }

                int zz = city.PRNG.nextInt(CDx.length);
                x += CDx[zz];
                y += CDy[zz];

                if (!city.testBounds(x/16, y/16)) {
                        // out of bounds
                        this.frame = 0;
                        return;
                }

                if (this.count == 0 && city.PRNG.nextInt(501) == 0) {
                        // early termination
                        this.frame = 0;
                        return;
                }

                destroyTile(x/16, y/16);
        }
}