Fix a few truncation and off by 1 errors

src/main/java/com/seibel/lod/builders/LodBufferBuilder.java

@@ -159,9 +159,10 @@ public class LodBufferBuilder
 					
 					// set where this square will be drawn in the world
 					double xOffset = (LodChunk.WIDTH * i) + // offset by the number of LOD blocks
-									startX; // offset so the center LOD block is centered underneath the player
+									startX + // offset so the center LOD block is centered underneath the player
+									2; // truncation(?) correction
 					double yOffset = 0;
-					double zOffset = (LodChunk.WIDTH * j) + startZ;
+					double zOffset = (LodChunk.WIDTH * j) + startZ + 2;
 					
 					LodChunk lod = lodDim.getLodFromCoordinates(chunkX, chunkZ);
 					

src/main/java/com/seibel/lod/builders/LodChunkBuilder.java

@@ -289,7 +289,7 @@ public class LodChunkBuilder
 								// enough blocks in this
 								// layer to count as an
 								// LOD point
-								return (short) (y + (section * CHUNK_SECTION_HEIGHT));
+								return (short) (y + 1 + (section * CHUNK_SECTION_HEIGHT));
 							}
 						}
 					}