Add fp precision display.

src/minecraft/net/minecraft/src/GuiIngame.java

@@ -34,6 +34,11 @@ public class GuiIngame extends Gui
         this.persistantChatGUI = new GuiNewChat(par1Minecraft);
     }
 
+    private char getColorCodeFromPrecision(double precision) {
+        if(precision <= 0.03125D /* 1/32 */) return 'a';
+        else return precision > 0.25 /* 1/2 */ ? 'c' : 'e';
+     }
+    
     /**
      * Render the ingame overlay with quick icon bar, ...
      */
@@ -423,6 +428,13 @@ public class GuiIngame extends Gui
             }
 
             this.drawString(var8, String.format("ws: %.3f, fs: %.3f, g: %b", new Object[] {Float.valueOf(this.mc.thePlayer.capabilities.getWalkSpeed()), Float.valueOf(this.mc.thePlayer.capabilities.getFlySpeed()), Boolean.valueOf(this.mc.thePlayer.onGround)}), 2, 104, 14737632);
+            int maxBit = x.max(z).bitLength();
+            
+            double doublePrecision = Math.pow(2, (maxBit - 53)),
+            	   floatPrecision  = Math.pow(2, (maxBit - 24));
+           
+            this.drawString(var8, "Current precision: \247" + this.getColorCodeFromPrecision(doublePrecision) + doublePrecision + "\247r (float: \247" + this.getColorCodeFromPrecision(floatPrecision) + floatPrecision + "\247r)", 2, 114, 14737632);
+            
             GL11.glPopMatrix();
             this.mc.mcProfiler.endSection();
         }

src/minecraft/net/minecraft/src/WorldRenderer.java

@@ -145,7 +145,7 @@ public class WorldRenderer
             var21.addAll(this.tileEntityRenderers);
             this.tileEntityRenderers.clear();
             byte var8 = 1;
-            ChunkCache var9 = new ChunkCache(this.worldObj, var1.subtract(BigInteger.ONE), var2 - var8, var3.subtract(BigInteger.ONE), var4.add(BigInteger.ONE), var5 + var8, var6.add(BigInteger.ONE));
+            IBlockAccess var9 = new ChunkCache(this.worldObj, var1.subtract(BigInteger.ONE), var2 - var8, var3.subtract(BigInteger.ONE), var4.add(BigInteger.ONE), var5 + var8, var6.add(BigInteger.ONE));
 
             if (!var9.extendedLevelsInChunkCache())
             {