From 5d762c6f6d1a208acfebb4f85a9af8fc877ff2b4 Mon Sep 17 00:00:00 2001
From: Anton <an.bulah@ya.ru>
Date: Sun, 6 Apr 2014 16:59:11 +0300
Subject: [PATCH] Raytrace check and proper collision boxes.

---
 common/buildcraft/energy/BlockEngine.java | 48 ++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

diff --git a/common/buildcraft/energy/BlockEngine.java b/common/buildcraft/energy/BlockEngine.java
index b4d784ae..08926689 100644
--- a/common/buildcraft/energy/BlockEngine.java
+++ b/common/buildcraft/energy/BlockEngine.java
@@ -28,10 +28,23 @@ import buildcraft.core.BlockBuildCraft;
 import buildcraft.core.CreativeTabBuildCraft;
 import buildcraft.core.IItemPipe;
 import cpw.mods.fml.relauncher.Side;
-import cpw.mods.fml.relauncher.SideOnly;
+import cpw.mods.fml.relauncher.SideOnly;import net.minecraft.util.MovingObjectPosition;
+import net.minecraft.util.AxisAlignedBB;
+import net.minecraft.util.Vec3;
+
+import static net.minecraft.util.AxisAlignedBB.getBoundingBox;
 
 public class BlockEngine extends BlockBuildCraft {
 
+	public static final AxisAlignedBB[][] boxes = {
+		{getBoundingBox(0.0, 0.5, 0.0, 1.0, 1.0, 1.0), getBoundingBox(0.25, 0.0, 0.25, 0.75, 0.5, 0.75)},// -Y
+		{getBoundingBox(0.0, 0.0, 0.0, 1.0, 0.5, 1.0), getBoundingBox(0.25, 0.5, 0.25, 0.75, 1.0, 0.75)},// +Y
+		{getBoundingBox(0.0, 0.0, 0.5, 1.0, 1.0, 1.0), getBoundingBox(0.25, 0.25, 0.0, 0.75, 0.75, 0.5)},// -Z
+		{getBoundingBox(0.0, 0.0, 0.0, 1.0, 1.0, 0.5), getBoundingBox(0.25, 0.25, 0.5, 0.75, 0.75, 1.0)},// +Z
+		{getBoundingBox(0.5, 0.0, 0.0, 1.0, 1.0, 1.0), getBoundingBox(0.0, 0.25, 0.25, 0.5, 0.75, 0.75)},// -X
+		{getBoundingBox(0.0, 0.0, 0.0, 0.5, 1.0, 1.0), getBoundingBox(0.5, 0.25, 0.25, 1.0, 0.75, 0.75)} // +X
+	};
+
 	private static IIcon woodTexture;
 	private static IIcon stoneTexture;
 	private static IIcon ironTexture;
@@ -121,6 +134,39 @@ public class BlockEngine extends BlockBuildCraft {
 		return false;
 	}
 
+	@Override
+	public void addCollisionBoxesToList(World wrd, int x, int y, int z, AxisAlignedBB full, List list, Entity ent) {
+		TileEntity tile = wrd.getTileEntity(x, y, z);
+		if (tile instanceof TileEngine){
+			AxisAlignedBB[] aabbs = boxes[((TileEngine)tile).orientation.ordinal()];
+			for (AxisAlignedBB aabb : aabbs) {
+				list.add(aabb);
+			}
+		} else {
+			super.addCollisionBoxesToList(wrd, x, y, z, full, list, ent);
+		}
+	}
+
+	@Override
+	public MovingObjectPosition collisionRayTrace(World wrd, int x, int y, int z, Vec3 origin, Vec3 direction) {
+		TileEntity tile = wrd.getTileEntity(x, y, z);
+		if (tile instanceof TileEngine){
+			AxisAlignedBB[] aabbs = boxes[((TileEngine)tile).orientation.ordinal()];
+			for(AxisAlignedBB aabb : aabbs){
+				MovingObjectPosition mop = aabb.getOffsetBoundingBox(x, y, z).calculateIntercept(origin, direction);
+				if(mop != null){
+					mop.blockX = x;
+					mop.blockY = y;
+					mop.blockZ = z;
+					return mop;
+				}
+			}
+			return null;
+		} else {
+			return super.collisionRayTrace(wrd, x, y, z, origin, direction);
+		}
+	}
+
 	@Override
 	public void onPostBlockPlaced(World world, int x, int y, int z, int par5) {
 		TileEngine tile = (TileEngine) world.getTileEntity(x, y, z);