physics/Material

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/* **-*-c++-*-**************************************************************
  Copyright (C)1996 David Jung <opensim@pobox.com>

  This program/file 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. (http://www.gnu.org)
  
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  
  $Id: Material 1031 2004-02-11 20:46:36Z jungd $
  $Revision: 1.6 $
  $Date: 2004-02-11 15:46:36 -0500 (Wed, 11 Feb 2004) $
  $Author: jungd $
 
****************************************************************************/

#ifndef _PHYSICS_MATERIAL_
#define _PHYSICS_MATERIAL_

#include <base/base>
#include <base/Externalizable>
#include <base/Dimension3>
#include <base/PathName>
#include <gfx/Color4>
#include <physics/Shape>

#include <osg/StateSet>

#include <string>


namespace physics {


class Material : public base::ReferencedObject, public base::Externalizable
{
public:
  Material(const String& label="plastic", const gfx::Color4& color = gfx::Color4("green"));
  Material(const Material& m);
  virtual ~Material();
  
  virtual String className() const { return String("Material"); }
  virtual Object& clone() const { return *NewNamedObj(className()) Material(*this); }

  virtual void setBaseColor(const gfx::Color4& color) { mBaseColor = color; stateSetCached=false; }
  virtual void setBaseColor(const String& color) { mBaseColor = gfx::Color4(color); stateSetCached=false; }
  virtual const gfx::Color4& baseColor() const { return mBaseColor; }
  
  virtual void setDensity(Real density) { mDensity=density; }
  virtual Real density() const { return mDensity; }
  
  virtual void setSurfaceAppearance(const base::PathName& image);

  virtual osg::ref_ptr<osg::StateSet> createState() const;

  // Externalizable
  virtual bool formatSupported(const String format, Real version = 1.0, ExternalizationType type = IO) const
    { return ( (format=="xml") && (version==1.0) ); }
  virtual void externalize(base::Externalizer& e, String format = "", Real version = 1.0);

protected:
  String label;

  Real mDensity;

  enum SurfaceAppearanceType { BaseColor, TextureImage };

  SurfaceAppearanceType surfaceAppearanceType;

  gfx::Color4 mBaseColor;
  base::PathName surfaceTextureImage;

  // cache osg::StateSet
  mutable bool stateSetCached;
  mutable osg::ref_ptr<osg::StateSet> stateSet;
  
};


} // physics

#endif

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