Michael Bayne
a8a2d9b1ba
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2276 542714f4-19e9-0310-aa3c-eee0fc999fb1
81 lines
2.6 KiB
Java
81 lines
2.6 KiB
Java
//
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// $Id: ScrollingScene.java,v 1.12 2003/02/12 07:24:07 mdb Exp $
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package com.threerings.miso.client;
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import java.awt.Rectangle;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.Random;
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import com.samskivert.io.PersistenceException;
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import com.threerings.media.tile.NoSuchTileException;
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import com.threerings.media.tile.NoSuchTileSetException;
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import com.threerings.media.tile.ObjectTile;
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import com.threerings.media.tile.Tile;
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import com.threerings.media.tile.TileSet;
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import com.threerings.media.tile.TileSetRepository;
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import com.threerings.miso.client.util.ObjectSet;
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import com.threerings.miso.tile.BaseTile;
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import com.threerings.miso.tile.BaseTileSet;
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import com.threerings.miso.util.MisoContext;
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/**
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* Provides an infinite array of tiles in which to scroll.
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*/
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public class ScrollingScene extends VirtualDisplayMisoSceneImpl
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{
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public ScrollingScene (MisoContext ctx)
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throws NoSuchTileSetException, NoSuchTileException, PersistenceException
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{
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// locate the water tileset
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TileSetRepository tsrepo = ctx.getTileManager().getTileSetRepository();
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Iterator iter = tsrepo.enumerateTileSets();
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String tsname = null;
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while (iter.hasNext()) {
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TileSet tset = (TileSet)iter.next();
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// yay for built-in regex support!
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if (tset.getName().matches(".*[Ww]ater.*") &&
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tset instanceof BaseTileSet) {
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tsname = tset.getName();
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break;
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}
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}
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if (tsname == null) {
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throw new RuntimeException("Unable to locate water tileset.");
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}
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// now we look the tileset up by name so that it is properly
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// initialized and all that business
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TileSet wtset = ctx.getTileManager().getTileSet(tsname);
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// grab our four repeating tiles
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_tiles = new BaseTile[wtset.getTileCount()];
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for (int ii = 0; ii < wtset.getTileCount(); ii++) {
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_tiles[ii] = (BaseTile)wtset.getTile(ii);
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}
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}
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// documentation inherited from interface
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public BaseTile getBaseTile (int x, int y)
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{
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long seed = ((x^y) ^ multiplier) & mask;
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long hash = (seed * multiplier + addend) & mask;
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int tidx = (int)((hash >> 10) % _tiles.length);
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return _tiles[tidx];
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}
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protected BaseTile[] _tiles;
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protected Random _rand = new Random();
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protected final static long multiplier = 0x5DEECE66DL;
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protected final static long addend = 0xBL;
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protected final static long mask = (1L << 48) - 1;
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protected static final int WATER_TILESET_ID = 8;
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}
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