From ce955f37ba9f431122ca3c46e5a7dac63ffd65ea Mon Sep 17 00:00:00 2001
From: kwolekr <kwolekr@minetest.net>
Date: Mon, 8 Jul 2013 15:19:22 -0400
Subject: [PATCH] Decoration: Handle facedir and wallmounted param2types with
 schematic rotation

---
 src/mapgen.cpp  |  9 +++++++--
 src/mapgen.h    | 14 ++++----------
 src/mapnode.cpp | 26 ++++++++++++++++++++++++++
 src/mapnode.h   | 13 +++++++++++++
 4 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index fe1cfb3a4..6bc487331 100644
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -237,6 +237,8 @@ Decoration::~Decoration() {
 
 
 void Decoration::resolveNodeNames(INodeDefManager *ndef) {
+	this->ndef = ndef;
+	
 	if (c_place_on == CONTENT_IGNORE)
 		c_place_on = ndef->getId(place_on_name);
 }
@@ -553,7 +555,7 @@ std::string DecoSchematic::getName() {
 
 
 void DecoSchematic::blitToVManip(v3s16 p, ManualMapVoxelManipulator *vm,
-								int rot, bool force_placement) {
+								Rotation rot, bool force_placement) {
 	int xstride = 1;
 	int ystride = size.X;
 	int zstride = size.X * size.Y;
@@ -594,7 +596,7 @@ void DecoSchematic::blitToVManip(v3s16 p, ManualMapVoxelManipulator *vm,
 			u32 vi = vm->m_area.index(p.X + x, p.Y + y, p.Z + z);
 			if (!vm->m_area.contains(vi))
 				continue;
-				
+			
 			if (schematic[i].getContent() == CONTENT_IGNORE)
 				continue;
 
@@ -609,6 +611,9 @@ void DecoSchematic::blitToVManip(v3s16 p, ManualMapVoxelManipulator *vm,
 			
 			vm->m_data[vi] = schematic[i];
 			vm->m_data[vi].param1 = 0;
+			
+			if (rot)
+				vm->m_data[vi].rotateAlongYAxis(ndef, rot);
 		}
 	}
 }
diff --git a/src/mapgen.h b/src/mapgen.h
index 2287445ee..b167978d7 100644
--- a/src/mapgen.h
+++ b/src/mapgen.h
@@ -23,6 +23,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "irrlichttypes_extrabloated.h"
 #include "util/container.h" // UniqueQueue
 #include "gamedef.h"
+#include "nodedef.h"
 #include "mapnode.h"
 #include "noise.h"
 #include "settings.h"
@@ -63,7 +64,6 @@ class EmergeManager;
 class MapBlock;
 class ManualMapVoxelManipulator;
 class VoxelManipulator;
-class INodeDefManager;
 struct BlockMakeData;
 class VoxelArea;
 class Map;
@@ -216,6 +216,8 @@ struct CutoffData {
 
 class Decoration {
 public:
+	INodeDefManager *ndef;
+	
 	int mapseed;
 	std::string place_on_name;
 	content_t c_place_on;
@@ -262,14 +264,6 @@ public:
 
 #define MTSCHEM_FILE_SIGNATURE 0x4d54534d // 'MTSM'
 
-enum Rotation {
-	ROTATE_0,
-	ROTATE_90,
-	ROTATE_180,
-	ROTATE_270,
-	ROTATE_RAND,
-};
-
 class DecoSchematic : public Decoration {
 public:
 	std::string filename;
@@ -291,7 +285,7 @@ public:
 	virtual std::string getName();
 	
 	void blitToVManip(v3s16 p, ManualMapVoxelManipulator *vm,
-					int rot, bool force_placement);
+					Rotation rot, bool force_placement);
 	
 	bool loadSchematicFile();
 	void saveSchematicFile(INodeDefManager *ndef);
diff --git a/src/mapnode.cpp b/src/mapnode.cpp
index bba845fcc..388818c42 100644
--- a/src/mapnode.cpp
+++ b/src/mapnode.cpp
@@ -28,6 +28,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <string>
 #include <sstream>
 
+static const Rotation wallmounted_to_rot[] = {
+	ROTATE_0, ROTATE_180, ROTATE_90, ROTATE_270
+};
+static const u8 rot_to_wallmounted[] = {
+	2, 4, 3, 5
+};
+
+
 /*
 	MapNode
 */
@@ -132,6 +140,24 @@ v3s16 MapNode::getWallMountedDir(INodeDefManager *nodemgr) const
 	}
 }
 
+void MapNode::rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot) {
+	ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
+
+	if (cpt2 == CPT2_FACEDIR) {
+		u8 newrot = param2 & 3;
+		param2 &= ~3;
+		param2 |= (newrot + rot) & 3;
+	} 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 1c8c5c49c..60211b87c 100644
--- a/src/mapnode.h
+++ b/src/mapnode.h
@@ -61,6 +61,17 @@ enum LightBank
 	LIGHTBANK_NIGHT
 };
 
+/*
+	Simple rotation enum.
+*/
+enum Rotation {
+	ROTATE_0,
+	ROTATE_90,
+	ROTATE_180,
+	ROTATE_270,
+	ROTATE_RAND,
+};
+
 /*
 	Masks for MapNode.param2 of flowing liquids
  */
@@ -181,6 +192,8 @@ struct MapNode
 	u8 getFaceDir(INodeDefManager *nodemgr) const;
 	u8 getWallMounted(INodeDefManager *nodemgr) const;
 	v3s16 getWallMountedDir(INodeDefManager *nodemgr) const;
+	
+	void rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot);
 
 	/*
 		Gets list of node boxes (used for rendering (NDT_NODEBOX)