From a56aedb4eae7d21864ab8dc56a82f644c4639f7a Mon Sep 17 00:00:00 2001
From: paramat <mat.gregory@virginmedia.com>
Date: Mon, 21 Sep 2015 01:21:28 +0100
Subject: [PATCH] Mapnode: Add rotateAlongYAxisFull supporting 24 facedirs

---
 src/mapnode.cpp      | 56 +++++++++++++++++++++++++++++++++++++++++++-
 src/mapnode.h        |  1 +
 src/mg_schematic.cpp |  2 +-
 3 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/src/mapnode.cpp b/src/mapnode.cpp
index 73223783..64c0ea03 100644
--- a/src/mapnode.cpp
+++ b/src/mapnode.cpp
@@ -159,7 +159,8 @@ v3s16 MapNode::getWallMountedDir(INodeDefManager *nodemgr) const
 	}
 }
 
-void MapNode::rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot) {
+void MapNode::rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot)
+{
 	ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
 
 	if (cpt2 == CPT2_FACEDIR) {
@@ -180,6 +181,59 @@ void MapNode::rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot) {
 	}
 }
 
+void MapNode::rotateAlongYAxisFull(INodeDefManager *nodemgr, Rotation rot)
+{
+	ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
+
+	if (cpt2 == CPT2_FACEDIR) {
+		static const u16 rotate_facedir[24 * 4] = {
+			// Table value = rotated facedir
+			// Columns: 0, 90, 180, 270 degrees rotation around vertical axis
+			// Rotation is anticlockwise as seen from above (+Y)
+
+			0, 1, 2, 3,  // Initial facedir 0 to 3
+			1, 2, 3, 0,
+			2, 3, 0, 1,
+			3, 0, 1, 2,
+
+			4, 13, 10, 19,  // 4 to 7
+			5, 14, 11, 16,
+			6, 15, 8, 17,
+			7, 12, 9, 18,
+
+			8, 17, 6, 15,  // 8 to 11
+			9, 18, 7, 12,
+			10, 19, 4, 13,
+			11, 16, 5, 14,
+
+			12, 9, 18, 7,  // 12 to 15
+			13, 10, 19, 4,
+			14, 11, 16, 5,
+			15, 8, 17, 6,
+
+			16, 5, 14, 11,  // 16 to 19
+			17, 6, 15, 8,
+			18, 7, 12, 9,
+			19, 4, 13, 10,
+
+			20, 23, 22, 21,  // 20 to 23
+			21, 20, 23, 22,
+			22, 21, 20, 23,
+			23, 22, 21, 20
+		};
+		u16 index = param2 * 4 + rot;
+		param2 = rotate_facedir[index];
+	} else if (cpt2 == CPT2_WALLMOUNTED) {
+		u8 wmountface = (param2 & 7);
+		if (wmountface <= 1)
+			return;
+
+		Rotation oldrot = wallmounted_to_rot[wmountface - 2];
+		param2 &= ~7;
+		param2 |= rot_to_wallmounted[(oldrot - rot) & 3];
+	}
+}
+
 static std::vector<aabb3f> transformNodeBox(const MapNode &n,
 		const NodeBox &nodebox, INodeDefManager *nodemgr)
 {
diff --git a/src/mapnode.h b/src/mapnode.h
index 7cc25c60..27151739 100644
--- a/src/mapnode.h
+++ b/src/mapnode.h
@@ -236,6 +236,7 @@ struct MapNode
 	v3s16 getWallMountedDir(INodeDefManager *nodemgr) const;
 
 	void rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot);
+	void rotateAlongYAxisFull(INodeDefManager *nodemgr, Rotation rot);
 
 	/*
 		Gets list of node boxes (used for rendering (NDT_NODEBOX))
diff --git a/src/mg_schematic.cpp b/src/mg_schematic.cpp
index a5ffb20b..ca915b7b 100644
--- a/src/mg_schematic.cpp
+++ b/src/mg_schematic.cpp
@@ -167,7 +167,7 @@ void Schematic::blitToVManip(v3s16 p, MMVManip *vm, Rotation rot, bool force_pla
 				vm->m_data[vi].param1 = 0;
 
 				if (rot)
-					vm->m_data[vi].rotateAlongYAxis(m_ndef, rot);
+					vm->m_data[vi].rotateAlongYAxisFull(m_ndef, rot);
 			}
 		}
 		y_map++;