From b1936d09d6f37f941e594493e8a7e18fca88cc55 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 14 Aug 2013 17:08:20 +0300
Subject: [PATCH] Support mirroring only a subset of rods based on a tag filter

---
 source/libr2c2/vehicletype.cpp | 27 +++++++++++++++++++++++----
 source/libr2c2/vehicletype.h   |  2 ++
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/source/libr2c2/vehicletype.cpp b/source/libr2c2/vehicletype.cpp
index 786d18a..7200b99 100644
--- a/source/libr2c2/vehicletype.cpp
+++ b/source/libr2c2/vehicletype.cpp
@@ -1,6 +1,7 @@
 #include <msp/core/maputils.h>
 #include <msp/geometry/box.h>
 #include <msp/geometry/transformedshape.h>
+#include <msp/strings/regex.h>
 #include <msp/strings/format.h>
 #include "vehicletype.h"
 
@@ -179,12 +180,24 @@ void VehicleType::Loader::mirror_rods()
 {
 	MirrorParametersLoader params;
 	load_sub_with(params);
+	Regex r_filter(params.filter);
+
+	vector<unsigned> mirror_indices(obj.rods.size(), 0);
+	for(TagMap::const_iterator i=rod_tags.begin(); i!=rod_tags.end(); ++i)
+		if(i->second<0x10000 && r_filter.match(i->first))
+			mirror_indices[i->second] = 1;
+
+	for(unsigned i=0, j=obj.rods.size(); i<mirror_indices.size(); ++i)
+		if(mirror_indices[i])
+			mirror_indices[i] = j++;
 
 	Transform axle_trans = Transform::rotation(params.phase_offset, Vector(0, 1, 0));
 
-	unsigned index_offset = obj.rods.size();
-	for(unsigned i=0; i<index_offset; ++i)
+	for(unsigned i=0; i<mirror_indices.size(); ++i)
 	{
+		if(!mirror_indices[i])
+			continue;
+
 		Rod mr = obj.rods[i];
 		mr.initial_position.y = -mr.initial_position.y;
 		mr.mirror_object = !mr.mirror_object;
@@ -193,8 +206,8 @@ void VehicleType::Loader::mirror_rods()
 			j->target_position.y = -j->target_position.y;
 			j->local_position.y = -j->local_position.y;
 			j->axis.y = -j->axis.y;
-			if(j->target==RodConstraint::ROD)
-				j->target_index += index_offset;
+			if(j->target==RodConstraint::ROD && mirror_indices[j->target_index])
+				j->target_index = mirror_indices[j->target_index];
 			else if(j->target==RodConstraint::AXLE)
 				j->target_position = axle_trans.transform(j->target_position);
 		}
@@ -360,9 +373,15 @@ void VehicleType::Rod::Loader::initial_position(float x, float y, float z)
 
 VehicleType::MirrorParametersLoader::MirrorParametersLoader()
 {
+	add("filter", &MirrorParametersLoader::filt);
 	add("phase_offset", &MirrorParametersLoader::phase_offs);
 }
 
+void VehicleType::MirrorParametersLoader::filt(const string &f)
+{
+	filter = f;
+}
+
 void VehicleType::MirrorParametersLoader::phase_offs(float o)
 {
 	phase_offset = Angle::from_degrees(o);
diff --git a/source/libr2c2/vehicletype.h b/source/libr2c2/vehicletype.h
index 1305a19..a027915 100644
--- a/source/libr2c2/vehicletype.h
+++ b/source/libr2c2/vehicletype.h
@@ -148,10 +148,12 @@ public:
 	class MirrorParametersLoader: public Msp::DataFile::Loader
 	{
 	public:
+		std::string filter;
 		Angle phase_offset;
 
 		MirrorParametersLoader();
 	private:
+		void filt(const std::string &);
 		void phase_offs(float);
 	};
 
-- 
2.43.0