/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

    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