Fix not being able to slide up small blocks with height < slab height (Thanks Empy), now use actual model's collision size instead of the default humanoid collision size, closes #110.

ClassicalSharp/2D/Screens/BlockSelectScreen.cs

@@ -140,7 +140,6 @@ namespace ClassicalSharp {
 				int index = 0;
 				SplitUppercase( origName, ref index );
 				normalNames[i] = buffer.ToString();
-				Console.WriteLine( buffer.ToString() );
 			}
 		}
 		

ClassicalSharp/Entities/Entity.cs

@@ -38,9 +38,13 @@ namespace ClassicalSharp {
 		
 		/// <summary> Returns the size of the model that is used for collision detection. </summary>
 		public virtual Vector3 CollisionSize {
-			get { return new Vector3( 8/16f, 28.5f/16f, 8/16f );
+			get { UpdateModel(); return Model.CollisionSize; }
-				//Model.CollisionSize; TODO: for non humanoid models
+		}
-			}
+		
+		void UpdateModel() {
+			BlockModel model = Model as BlockModel;
+			if( model != null )
+				model.CalcState( byte.Parse( ModelName ) );
 		}
 		
 		/// <summary> Bounding box of the model that collision detection
@@ -103,9 +107,7 @@ namespace ClassicalSharp {
 		/// bounding box of this entity are lava or still lava. </summary>
 		protected bool TouchesAnyLava() {
 			BoundingBox bounds = CollisionBounds.Expand( liqExpand );
-			// Even though we collide with lava 3 blocks above our feet, vanilla client thinks
+			AdjustLiquidTestBounds( ref bounds );
-			// that we do not.. so we have to maintain compatibility here.
-			bounds.Max.Y -= 4/16f;
 			return TouchesAny( bounds,
 			                  b => b == (byte)Block.Lava || b == (byte)Block.StillLava );
 		}
@@ -121,9 +123,17 @@ namespace ClassicalSharp {
 		/// bounding box of this entity are water or still water. </summary>
 		protected bool TouchesAnyWater() {
 			BoundingBox bounds = CollisionBounds.Expand( liqExpand );
-			bounds.Max.Y -= 4/16f;
+			AdjustLiquidTestBounds( ref bounds );
 			return TouchesAny( bounds,
 			                  b => b == (byte)Block.Water || b == (byte)Block.StillWater );
 		}
+		
+		void AdjustLiquidTestBounds( ref BoundingBox bounds ) {
+			// Even though we collide with lava 3 blocks above our feet, vanilla client thinks
+			// that we do not.. so we have to maintain compatibility here.
+			float height = bounds.Max.Y - bounds.Min.Y;
+			const float pHeight = (28.5f - 4f)/16f;
+			bounds.Max.Y = bounds.Min.Y + Math.Min( height, pHeight );
+		}
 	}
 }

ClassicalSharp/Entities/LocalPlayer.cs

@@ -165,26 +165,25 @@ namespace ClassicalSharp {
 			}
 			
 			if( !jumping ) {
-				canLiquidJump = false;
+				canLiquidJump = false; return;
-				return;
 			}
 			
 			bool touchWater = TouchesAnyWater();
 			bool touchLava = TouchesAnyLava();
+			Console.WriteLine( touchWater );
 			if( touchWater || touchLava ) {
 				BoundingBox bounds = CollisionBounds;
 				int feetY = Utils.Floor( bounds.Min.Y ), bodyY = feetY + 1;
 				int headY = Utils.Floor( bounds.Max.Y );
+				if( bodyY > headY ) bodyY = headY;
 				
 				bounds.Max.Y = bounds.Min.Y = feetY;
 				bool liquidFeet = TouchesAny( bounds, StandardLiquid );
-				bounds.Max.Y = bounds.Min.Y = bodyY;
+				bounds.Min.Y = Math.Min( bodyY, headY );
-				bool liquidBody = TouchesAny( bounds, StandardLiquid );
+				bounds.Max.Y = Math.Max( bodyY, headY );
-				bounds.Max.Y = bounds.Min.Y = headY;
+				bool liquidRest = TouchesAny( bounds, StandardLiquid );
-				bool liquidHead = TouchesAny( bounds, StandardLiquid );
 				
-				bool pastJumpPoint = liquidFeet && !(liquidBody || liquidHead)
+				bool pastJumpPoint = liquidFeet && !liquidRest && (Position.Y % 1 >= 0.4);			
-					&& (Position.Y % 1 >= 0.4);
 				if( !pastJumpPoint ) {
 					canLiquidJump = true;
 					Velocity.Y += speeding ? 0.08f : 0.04f;

ClassicalSharp/Entities/PhysicsEntity.cs

@@ -85,7 +85,7 @@ namespace ClassicalSharp {
 			int elements = (max.X + 1 - min.X) * (max.Y + 1 - min.Y) * (max.Z + 1 - min.Z);
 			if( elements > stateCache.Length ) {
 				stateCache = new State[elements];
-			}			
+			}
 			
 			BoundingBox blockBB = default( BoundingBox );
 			// Order loops so that we minimise cache misses
@@ -160,27 +160,17 @@ namespace ClassicalSharp {
 		              ref BoundingBox entityBB, ref BoundingBox entityExtentBB ) {
 			float yDist = blockBB.Max.Y - entityBB.Min.Y;
 			if( yDist > 0 && yDist <= StepSize + 0.01f ) {
-				
 				// Adjust entity bounding box to include the block being tested
 				BoundingBox adjFinalBB = finalBB;
 				adjFinalBB.Min.X = Math.Min( finalBB.Min.X, blockBB.Min.X + Adjustment );
 				adjFinalBB.Max.X = Math.Max( finalBB.Max.X, blockBB.Max.X - Adjustment );
-				adjFinalBB.Min.Y = (float)Math.Ceiling( blockBB.Max.Y ) + Adjustment;
+				adjFinalBB.Min.Y = blockBB.Max.Y + Adjustment;
 				adjFinalBB.Max.Y = adjFinalBB.Min.Y + size.Y;
 				adjFinalBB.Min.Z = Math.Min( finalBB.Min.Z, blockBB.Min.Z + Adjustment );
 				adjFinalBB.Max.Z = Math.Max( finalBB.Max.Z, blockBB.Max.Z - Adjustment );
 				
-				Vector3I min = Vector3I.Floor( adjFinalBB.Min );
+				if( !CanSlideThrough( ref adjFinalBB ) )
-				Vector3I max = Vector3I.Floor( adjFinalBB.Max );
+					return false;
-				for( int x = min.X; x <= max.X; x++ ) {
-					for( int y = min.Y; y <= max.Y; y++ ) {
-						for( int z = min.Z; z <= max.Z; z++ ) {
-							if( info.CollideType[GetPhysicsBlockId( x, y, z )] == BlockCollideType.Solid )
-								return false;
-						}
-					}
-				}
-				
 				Position.Y = blockBB.Max.Y + Adjustment;
 				onGround = true;
 				ClipY( ref size, ref entityBB, ref entityExtentBB );
@@ -189,6 +179,27 @@ namespace ClassicalSharp {
 			return false;
 		}
 		
+		bool CanSlideThrough( ref BoundingBox adjFinalBB ) {
+			Vector3I bbMin = Vector3I.Floor( adjFinalBB.Min );
+			Vector3I bbMax = Vector3I.Floor( adjFinalBB.Max );
+			
+			for( int y = bbMin.Y; y <= bbMax.Y; y++ )
+				for( int z = bbMin.Z; z <= bbMax.Z; z++ )
+					for( int x = bbMin.X; x <= bbMax.X; x++ )
+			{
+				byte block = GetPhysicsBlockId( x, y, z );
+				Vector3 min = new Vector3( x, y, z ) + info.MinBB[block];
+				Vector3 max = new Vector3( x, y, z ) + info.MaxBB[block];
+				
+				BoundingBox blockBB = new BoundingBox( min, max );			
+				if( !blockBB.Intersects( adjFinalBB ) ) 
+					continue;
+				if( info.CollideType[GetPhysicsBlockId( x, y, z )] == BlockCollideType.Solid )
+					return false;
+			}
+			return true;
+		}
+		
 		void ClipX( ref Vector3 size, ref BoundingBox entityBB, ref BoundingBox entityExtentBB ) {
 			Velocity.X = 0;
 			entityBB.Min.X = entityExtentBB.Min.X = Position.X - size.X / 2;

ClassicalSharp/Generator/Noise.cs

@@ -14,9 +14,7 @@ namespace ClassicalSharp.Generator {
 	public sealed class ImprovedNoise : Noise {
 		
 		public ImprovedNoise( Random rnd ) {
-			// make a random initial permutation based on rnd's seed,
+			// shuffle randomly using fisher-yates		
-			// shuffle using fisher-yates
-			
 			for( int i = 0; i < 256; i++ )
 				p[i] = (byte)i;
 			
@@ -28,7 +26,6 @@ namespace ClassicalSharp.Generator {
 				p[i + 256] = p[i];
 		}
 		
-		// TODO: need to half this maybe?
 		public override double Compute( double x, double y ) {
 			int xFloor = x >= 0 ? (int)x : (int)x - 1;
 			int yFloor = y >= 0 ? (int)y : (int)y - 1;

ClassicalSharp/Model/BlockModel.cs

@@ -10,8 +10,9 @@ namespace ClassicalSharp.Model {
 		byte block = (byte)Block.Air;
 		float blockHeight;
 		TerrainAtlas1D atlas;
-		const float adjust = 0.1f, extent = 0.5f;
+		const float extent = 0.5f, adjust = 0.5f/16f;
 		bool bright;
+		Vector3 minBB, maxBB;
 		
 		public BlockModel( Game game ) : base( game ) {
 		}
@@ -30,13 +31,27 @@ namespace ClassicalSharp.Model {
 		}
 		
 		public override Vector3 CollisionSize {
-			get { return new Vector3( 1 - adjust, blockHeight - adjust, 1 - adjust ); }
+			get { return (maxBB - minBB) - new Vector3( adjust ); }
 		}
 		
 		public override BoundingBox PickingBounds {
 			get { return new BoundingBox( -extent, 0f, -extent, extent, blockHeight, extent ); }
 		}
 		
+		public void CalcState( byte block ) {
+			if( block == 0 ) {
+				blockHeight = 1;
+				bright = false;
+				minBB = Vector3.Zero;
+				maxBB = Vector3.One;			
+			} else {
+				blockHeight = game.BlockInfo.Height[block];
+				bright = game.BlockInfo.FullBright[block];
+				minBB = game.BlockInfo.MinBB[block];
+				maxBB = game.BlockInfo.MaxBB[block];
+			}
+		}
+		
 		int lastTexId = -1;
 		protected override void DrawPlayerModel( Player p ) {
 			// TODO: using 'is' is ugly, but means we can avoid creating
@@ -49,14 +64,12 @@ namespace ClassicalSharp.Model {
 			} else {
 				block = Byte.Parse( p.ModelName );
 			}
-			if( block == 0 ) {
+			
-				blockHeight = 1;
+			CalcState( block );
+			if( block == 0 ) 
 				return;
-			}
 			lastTexId = -1;
-			blockHeight = game.BlockInfo.Height[block];
 			atlas = game.TerrainAtlas1D;
-			bright = game.BlockInfo.FullBright[block];
 			
 			if( game.BlockInfo.IsSprite[block] ) {
 				SpriteXQuad( TileSide.Right, true );
@@ -135,7 +148,7 @@ namespace ClassicalSharp.Model {
 
 			float p1, p2;
 			if( firstPart ) { // Need to break into two quads for when drawing a sprite model in hand.
-				rec.U1 = 0.5f; p1 = -5.5f/16; p2 = 0.0f/16;	
+				rec.U1 = 0.5f; p1 = -5.5f/16; p2 = 0.0f/16;
 			} else {
 				rec.U2 = 0.5f; p1 = 0.0f/16; p2 = 5.5f/16;
 			}
@@ -155,7 +168,7 @@ namespace ClassicalSharp.Model {
 			
 			float x1, x2, z1, z2;
 			if( firstPart ) {
-				rec.U1 = 0; rec.U2 = 0.5f; x1 = -5.5f/16; 
+				rec.U1 = 0; rec.U2 = 0.5f; x1 = -5.5f/16;
 				x2 = 0.0f/16; z1 = 5.5f/16; z2 = 0.0f/16;
 			} else {
 				rec.U1 = 0.5f; rec.U2 = 1f; x1 = 0.0f/16;

ClassicalSharp/Model/SpiderModel.cs

@@ -50,7 +50,6 @@ namespace ClassicalSharp.Model {
 			DrawPart( Link );
 			DrawPart( End );
 			
-			// TODO: leg animations
 			float rotX = (float)(Math.Sin( p.walkTime ) * p.swing * Math.PI);
 			float rotZ = (float)(Math.Cos( p.walkTime * 2 ) * p.swing * Math.PI / 16f);
 			float rotY = (float)(Math.Sin( p.walkTime * 2 ) * p.swing * Math.PI / 32f);