dynmap/MapTile.java
fescen9 c81cbfeeca
2010-12-05 21:00:52 +00:00

194 lines
4.0 KiB
Java

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);
} catch(java.lang.NullPointerException e) {
// IOException is not enough, a NullPointerException often occurs due to this issue
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5034864
log.log(Level.SEVERE, "Failed to save tile (NullPointerException): " + getPath(mgr), e);
} 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);
}
}
}
}
}
}