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diff --git a/src/tooldef.h b/src/tooldef.h
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+++ b/src/tooldef.h
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+/*
+Minetest-c55
+Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef TOOLDEF_HEADER
+#define TOOLDEF_HEADER
+
+#include <string>
+
+/*
+	TODO: Rename to tooldef.h
+*/
+
+struct ToolDiggingProperties
+{
+	// time = basetime + sum(feature here * feature in MaterialProperties)
+	float basetime;
+	float dt_weight;
+	float dt_crackiness;
+	float dt_crumbliness;
+	float dt_cuttability;
+	float basedurability;
+	float dd_weight;
+	float dd_crackiness;
+	float dd_crumbliness;
+	float dd_cuttability;
+
+	ToolDiggingProperties(float a=0.75, float b=0, float c=0, float d=0, float e=0,
+			float f=50, float g=0, float h=0, float i=0, float j=0):
+		basetime(a),
+		dt_weight(b),
+		dt_crackiness(c),
+		dt_crumbliness(d),
+		dt_cuttability(e),
+		basedurability(f),
+		dd_weight(g),
+		dd_crackiness(h),
+		dd_crumbliness(i),
+		dd_cuttability(j)
+	{}
+};
+
+struct ToolDefinition
+{
+	std::string imagename;
+	ToolDiggingProperties properties;
+
+	ToolDefinition(){}
+	ToolDefinition(const std::string &imagename_,
+			ToolDiggingProperties properties_):
+		imagename(imagename_),
+		properties(properties_)
+	{}
+};
+
+class IToolDefManager
+{
+public:
+	IToolDefManager(){}
+	virtual ~IToolDefManager(){}
+	virtual const ToolDefinition* getToolDefinition(const std::string &toolname) const=0;
+	virtual std::string getImagename(const std::string &toolname) const =0;
+	virtual ToolDiggingProperties getDiggingProperties(
+			const std::string &toolname) const =0;
+};
+
+class IWritableToolDefManager : public IToolDefManager
+{
+public:
+	IWritableToolDefManager(){}
+	virtual ~IWritableToolDefManager(){}
+	virtual const ToolDefinition* getToolDefinition(const std::string &toolname) const=0;
+	virtual std::string getImagename(const std::string &toolname) const =0;
+	virtual ToolDiggingProperties getDiggingProperties(
+			const std::string &toolname) const =0;
+			
+	virtual bool registerTool(std::string toolname, const ToolDefinition &def)=0;
+};
+
+IWritableToolDefManager* createToolDefManager();
+
+#endif
+