shadow_volume.h

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#ifndef SHADOW_VOLUME_H
#define SHADOW_VOLUME_H

#include "include.h"

typedef struct
{
    vec3 v1;
    vec3 v2;
    vec3 vNorm;
} edge_t;

class Graphics;

class ShadowVolume
{
public:
    ShadowVolume();
    int CreateVolume(Graphics &gfx, vertex_t *pVertex, unsigned int *pIndex, unsigned int start_index, unsigned int num_face, vec3 &vLight);
    void AddEdge(int *pEdge, unsigned int &num_edges, int v0, int v1);
    int render(Graphics &gfx);
    void destroy(Graphics &gfx);

    matrix3 morientation;
    vec3 position;
    int vbo;
    int ibo;

private:
    vertex_t    *vert_array; // Vertex data for rendering shadow volume
    unsigned int    *index_array;
    int         *pEdges;    // temporary edge list
    unsigned int            num_vert;

    unsigned int alloc_vert;
    unsigned int alloc_edge;

};


#endif