From 272125c769a63d67a6fa01ceb9b060328f17218f Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Sun, 25 Jan 2015 14:41:11 +1100
Subject: [PATCH] Fix corner case with slabs.

---
 Physics/Entity.Physics.cs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Physics/Entity.Physics.cs b/Physics/Entity.Physics.cs
index 9b42b7bad..60f2a6754 100644
--- a/Physics/Entity.Physics.cs
+++ b/Physics/Entity.Physics.cs
@@ -18,7 +18,7 @@ namespace ClassicalSharp {
 		
 		bool GetBoundingBox( byte block, int x, int y, int z, out BoundingBox box ) {
 			box = new BoundingBox( Vector3.Zero, Vector3.Zero );
-			if( block == 0 || info.IsSprite( block ) || info.IsLiquid( block ) || block == (byte)Block.Snow ) return false;
+			if( CanWalkThrough( block ) ) return false;
 			Vector3 min = new Vector3( x, y, z );
 			Vector3 max = new Vector3( x + 1, y + info.BlockHeight( block ), z + 1 );
 			box = new BoundingBox( min, max );
@@ -37,13 +37,17 @@ namespace ClassicalSharp {
 			}
 		}
 		
+		bool CanWalkThrough( byte block ) {
+			return block == 0 || info.IsSprite( block ) || info.IsLiquid( block ) || block == (byte)Block.Snow;
+		}
+		
 		bool IsFreeYForStep( BoundingBox blockBB ) {
 			// NOTE: if non whole blocks are added, use a proper AABB test.
 			int x = (int)Utils.Floor( blockBB.Min.X );
 			int y = (int)Utils.Floor( blockBB.Min.Y );		
 			int z = (int)Utils.Floor( blockBB.Min.Z );
-			return !info.IsOpaque( GetPhysicsBlockId( x, y + 1, z ) ) &&
-				!info.IsOpaque( GetPhysicsBlockId( x, y + 2, z ) );
+			return CanWalkThrough( GetPhysicsBlockId( x, y + 1, z ) ) &&
+				CanWalkThrough( GetPhysicsBlockId( x, y + 2, z ) );
 		}
 		
 		// TODO: test for corner cases, and refactor this.