From dc813c92095ff9f427cd199e4fe143ffea95e458 Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Thu, 22 Mar 2018 16:24:01 +1100
Subject: [PATCH] apparently I deleted this file when rebasing?

---
 ClassicalSharp/Blocks/BlockInfo.BoundsBox.cs | 124 +++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 ClassicalSharp/Blocks/BlockInfo.BoundsBox.cs

diff --git a/ClassicalSharp/Blocks/BlockInfo.BoundsBox.cs b/ClassicalSharp/Blocks/BlockInfo.BoundsBox.cs
new file mode 100644
index 000000000..7e1b05bfa
--- /dev/null
+++ b/ClassicalSharp/Blocks/BlockInfo.BoundsBox.cs
@@ -0,0 +1,124 @@
+// Copyright 2014-2017 ClassicalSharp | Licensed under BSD-3
+using System;
+using OpenTK;
+using ClassicalSharp;
+
+#if USE16_BIT
+using BlockID = System.UInt16;
+#else
+using BlockID = System.Byte;
+#endif
+
+namespace ClassicalSharp {
+	
+	/// <summary> Stores various properties about the blocks in Minecraft Classic. </summary>
+	public static partial class BlockInfo {
+		
+		public static Vector3[] MinBB = new Vector3[Block.Count];
+		public static Vector3[] MaxBB = new Vector3[Block.Count];
+		public static Vector3[] RenderMinBB = new Vector3[Block.Count];
+		public static Vector3[] RenderMaxBB = new Vector3[Block.Count];
+		
+		internal static void CalcRenderBounds(BlockID block) {
+			Vector3 min = MinBB[block], max = MaxBB[block];
+			
+			if (IsLiquid[block]) {
+				min.X -= 0.1f/16f; max.X -= 0.1f/16f;
+				min.Z -= 0.1f/16f; max.Z -= 0.1f/16f;
+				min.Y -= 1.5f/16f; max.Y -= 1.5f/16f;
+			} else if (Draw[block] == DrawType.Translucent && Collide[block] != CollideType.Solid) {
+				min.X += 0.1f/16f; max.X += 0.1f/16f;
+				min.Z += 0.1f/16f; max.Z += 0.1f/16f;
+				min.Y -= 0.1f/16f; max.Y -= 0.1f/16f;
+			}
+			
+			RenderMinBB[block] = min; RenderMaxBB[block] = max;
+		}
+		
+		internal static byte CalcLightOffset(BlockID block) {
+			int flags = 0xFF;
+			Vector3 min = MinBB[block], max = MaxBB[block];
+			
+			if (min.X != 0) flags &= ~(1 << Side.Left);
+			if (max.X != 1) flags &= ~(1 << Side.Right);
+			if (min.Z != 0) flags &= ~(1 << Side.Front);
+			if (max.Z != 1) flags &= ~(1 << Side.Back);
+			
+			if ((min.Y != 0 && max.Y == 1) && Draw[block] != DrawType.Gas) {
+				flags &= ~(1 << Side.Top);
+				flags &= ~(1 << Side.Bottom);
+			}
+			return (byte)flags;
+		}
+		
+		internal static void RecalculateSpriteBB() {
+			using (FastBitmap fastBmp = new FastBitmap(TerrainAtlas2D.Atlas, true, true)) {
+				for (int i = 0; i < Block.Count; i++) {
+					if (Draw[i] != DrawType.Sprite) continue;
+					RecalculateBB((BlockID)i, fastBmp);
+				}
+			}
+		}
+		
+		const float angle = 45f * Utils.Deg2Rad;
+		static readonly Vector3 centre = new Vector3(0.5f, 0, 0.5f);
+		internal static void RecalculateBB(BlockID block, FastBitmap fastBmp) {
+			int elemSize = fastBmp.Width / 16;
+			int texId = GetTextureLoc(block, Side.Right);
+			int texX = texId & 0x0F, texY = texId >> 4;
+			
+			float topY = GetSpriteBB_TopY(elemSize, texX, texY, fastBmp);
+			float bottomY = GetSpriteBB_BottomY(elemSize, texX, texY, fastBmp);
+			float leftX = GetSpriteBB_LeftX(elemSize, texX, texY, fastBmp);
+			float rightX = GetSpriteBB_RightX(elemSize, texX, texY, fastBmp);
+			
+			MinBB[block] = Utils.RotateY(leftX - 0.5f, bottomY, 0, angle) + centre;
+			MaxBB[block] = Utils.RotateY(rightX - 0.5f, topY, 0, angle) + centre;
+			CalcRenderBounds(block);
+		}
+		
+		unsafe static float GetSpriteBB_TopY(int size, int tileX, int tileY, FastBitmap fastBmp) {
+			for (int y = 0; y < size; y++) {
+				int* row = fastBmp.GetRowPtr(tileY * size + y) + (tileX * size);
+				for (int x = 0; x < size; x++) {
+					if ((byte)(row[x] >> 24) != 0)
+						return 1 - (float)y / size;
+				}
+			}
+			return 0;
+		}
+		
+		unsafe static float GetSpriteBB_BottomY(int size, int tileX, int tileY, FastBitmap fastBmp) {
+			for (int y = size - 1; y >= 0; y--) {
+				int* row = fastBmp.GetRowPtr(tileY * size + y) + (tileX * size);
+				for (int x = 0; x < size; x++) {
+					if ((byte)(row[x] >> 24) != 0)
+						return 1 - (float)(y + 1) / size;
+				}
+			}
+			return 1;
+		}
+		
+		unsafe static float GetSpriteBB_LeftX(int size, int tileX, int tileY, FastBitmap fastBmp) {
+			for (int x = 0; x < size; x++) {
+				for (int y = 0; y < size; y++) {
+					int* row = fastBmp.GetRowPtr(tileY * size + y) + (tileX * size);
+					if ((byte)(row[x] >> 24) != 0)
+						return (float)x / size;
+				}
+			}
+			return 1;
+		}
+		
+		unsafe static float GetSpriteBB_RightX(int size, int tileX, int tileY, FastBitmap fastBmp) {
+			for (int x = size - 1; x >= 0; x--) {
+				for (int y = 0; y < size; y++) {
+					int* row = fastBmp.GetRowPtr(tileY * size + y) + (tileX * size);
+					if ((byte)(row[x] >> 24) != 0)
+						return (float)(x + 1) / size;
+				}
+			}
+			return 0;
+		}
+	}
+}
\ No newline at end of file