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/*  Project nGenEx
    Destroyer Studios LLC
    Copyright © 1997-2004. All Rights Reserved.

    SUBSYSTEM:    nGenEx.lib
    FILE:         Shadow.h
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Dynamic Stencil Shadow Volumes
*/

#ifndef Shadow_h
#define Shadow_h

#include "Geometry.h"
#include "Color.h"

// +--------------------------------------------------------------------+

#define Shadow_DESTROY(x) if (x) { x->Destroy(); x = 0; }

// +--------------------------------------------------------------------+

class Light;
class Scene;
class Solid;
class Video;

// +--------------------------------------------------------------------+

class Shadow
{
public:
   static const char* TYPENAME() { return "Shadow"; }

   Shadow(Solid* solid);
   virtual ~Shadow();
   
   int operator == (const Shadow& s) const { return this == &s; }

   // operations
   void     Render(Video* video);
   void     Update(Light* light);
   void     AddEdge(WORD v1, WORD v2);
   void     Reset();

   bool     IsEnabled()          const { return enabled; }
   void     SetEnabled(bool e)         { enabled = e;    }

   static void SetVisibleShadowVolumes(bool vis);
   static bool GetVisibleShadowVolumes();

protected:
   Solid*   solid;
   Vec3*    verts;
   int      nverts;
   int      max_verts;
   bool     enabled;

   WORD*    edges;
   DWORD    num_edges;
};

// +--------------------------------------------------------------------+

#endif Shadow_h