added fescen9 branch

MapTile.java

@@ -0,0 +1,191 @@
+import java.util.logging.Logger;
+import java.util.logging.Level;
+
+import java.awt.*;
+import java.awt.image.*;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+public class MapTile {
+	protected static final Logger log = Logger.getLogger("Minecraft");
+
+	/* projection position */
+	public int px, py;
+
+	/* minecraft space origin */
+	public int mx, my, mz;
+
+	/* whether this tile needs to be updated */
+	boolean stale = false;
+
+	/* create new MapTile */
+	public MapTile(int px, int py)
+	{
+		this.px = px;
+		this.py = py;
+
+		mx = MapManager.anchorx + px / 2 + py / 2;
+		my = MapManager.anchory;
+		mz = MapManager.anchorz + px / 2 - py / 2;
+	}
+
+	/* get key by projection position */
+	public static long key(int px, int py)
+	{
+		long lpx = (long) px;
+		long lpy = (long) py;
+
+		return ((lpx & (long) 0xffffffffL) << 32) | (lpy & (long) 0xffffffffL);
+	}
+
+	/* hash value, based on projection position */
+	public int hashCode()
+	{
+		return (px << 16) ^ py;
+	}
+
+	/* equality comparison - based on projection position */
+	public boolean equals(MapTile o)
+	{
+		return o.px == px && o.py == py;
+	}
+
+	/* return a simple string representation... */
+	public String toString()
+	{
+		return px + "_" + py;
+	}
+
+	/* render this tile */
+	public void render(MapManager mgr)
+	{
+		mgr.debug("Rendering tile: " + this.toString());
+
+		BufferedImage im = new BufferedImage(MapManager.tileWidth, MapManager.tileHeight, BufferedImage.TYPE_INT_RGB);
+
+		WritableRaster r = im.getRaster();
+
+		int ix = mx;
+		int iy = my;
+		int iz = mz;
+		int jx, jz;
+
+		int x, y;
+
+		/* draw the map */
+		for(y=0; y<MapManager.tileHeight;) {
+			jx = ix;
+			jz = iz;
+
+			for(x=MapManager.tileWidth-1; x>=0; x-=2) {
+				Color c1 = scan(mgr, jx, iy, jz, 0);
+				Color c2 = scan(mgr, jx, iy, jz, 2);
+
+				r.setPixel(x, y, new int[] { c1.getRed(), c1.getGreen(), c1.getBlue() });
+				r.setPixel(x-1, y, new int[] { c2.getRed(), c2.getGreen(), c2.getBlue() });
+
+				jx++;
+				jz++;
+
+			}
+
+			y ++;
+
+			jx = ix;
+			jz = iz - 1;
+
+			for(x=MapManager.tileWidth-1; x>=0; x-=2) {
+				Color c1 = scan(mgr, jx, iy, jz, 2);
+				jx++;
+				jz++;
+				Color c2 = scan(mgr, jx, iy, jz, 0);
+
+				r.setPixel(x, y, new int[] { c1.getRed(), c1.getGreen(), c1.getBlue() });
+				r.setPixel(x-1, y, new int[] { c2.getRed(), c2.getGreen(), c2.getBlue() });
+			}
+
+			y ++;
+
+			ix ++;
+			iz --;
+		}
+
+		/* save image */
+		try {
+			String path = getPath(mgr);
+			File file = new File(path);
+			ImageIO.write(im, "png", file);
+
+			//log.info("Saved tile: " + path);
+		} catch(IOException e) {
+			log.log(Level.SEVERE, "Failed to save tile: " + getPath(mgr), e);
+		}
+	}
+
+	/* generate a path name for this map tile */
+	String getPath(MapManager mgr)
+	{
+		return mgr.tilepath + "t_" + px + "_" + py + ".png";
+	}
+
+	/* cast a ray into the map */
+	private Color scan(MapManager mgr, int x, int y, int z, int seq)
+	{
+		Server s = etc.getServer();
+
+		for(;;) {
+			if(y < 0)
+				return Color.BLUE;
+
+			int id = s.getBlockIdAt(x, y, z);
+
+			switch(seq) {
+			case 0:
+				x--;
+				break;
+			case 1:
+				y--;
+				break;
+			case 2:
+				z++;
+				break;
+			case 3:
+				y--;
+				break;
+			}
+
+			seq = (seq + 1) & 3;
+
+			if(id != 0) {
+				Color[] colors = mgr.colors.get(id);
+				if(colors != null) {
+					Color c = colors[seq];
+					if(c.getAlpha() > 0) {
+						/* we found something that isn't transparent! */
+						if(c.getAlpha() == 255) {
+							/* it's opaque - the ray ends here */
+							return c;
+						}
+
+						/* this block is transparent, so recurse */
+						Color bg = scan(mgr, x, y, z, seq);
+
+						int cr = c.getRed();
+						int cg = c.getGreen();
+						int cb = c.getBlue();
+						int ca = c.getAlpha();
+						cr *= ca;
+						cg *= ca;
+						cb *= ca;
+						int na = 255 - ca;
+
+						return new Color((bg.getRed() * na + cr) >> 8, (bg.getGreen() * na + cg) >> 8, (bg.getBlue() * na + cb) >> 8);
+					}
+				}
+			}
+		}
+	}
+}