Separated rendering from MapTile, removed separate cave logic (integrated in rendering) and temporarily removed/disabled zoom-rendering.

src/main/java/org/dynmap/render/CaveTileRenderer.java

@@ -0,0 +1,96 @@
+package org.dynmap.render;
+
+import java.awt.Color;
+import java.util.Map;
+
+import org.bukkit.World;
+import org.dynmap.MapManager;
+
+public class CaveTileRenderer extends DayTileRenderer {
+
+	public CaveTileRenderer(Map<Integer, Color[]> colors, String outputPath) {
+		super(colors, outputPath);
+	}
+
+	@Override
+	protected Color scan(World world, int x, int y, int z, int seq)
+	{
+		boolean air = true;
+
+		for(;;) {
+			if(y < 0)
+				return Color.BLACK;
+
+			int id = world.getBlockAt(x, y, z).getTypeID();
+
+			switch(seq) {
+			case 0:
+				x--;
+				break;
+			case 1:
+				y--;
+				break;
+			case 2:
+				z++;
+				break;
+			case 3:
+				y--;
+				break;
+			}
+
+			seq = (seq + 1) & 3;
+
+			switch(id) {
+			case 20:
+			case 18:
+			case 17:
+			case 78:
+			case 79:
+				id = 0;
+				break;
+			default:
+			}
+
+			if(id != 0) {
+				air = false;
+				continue;
+			}
+
+			if(id == 0 && !air) {
+				int cr, cg, cb;
+				int mult = 256;
+
+				if(y < 64) {
+					cr = 0;
+					cg = 64 + y * 3;
+					cb = 255 - y * 4;
+				} else {
+					cr = (y-64) * 4;
+					cg = 255;
+					cb = 0;
+				}
+
+				switch(seq) {
+				case 0:
+					mult = 224;
+					break;
+				case 1:
+					mult = 256;
+					break;
+				case 2:
+					mult = 192;
+					break;
+				case 3:
+					mult = 160;
+					break;
+				}
+
+				cr = cr * mult / 256;
+				cg = cg * mult / 256;
+				cb = cb * mult / 256;
+
+				return new Color(cr, cg, cb);
+			}
+		}
+	}
+}