TriangleFan.h

#pragma once
#include "Terrain.h"
#include "TerrainBlock.h"
#include "VertexFVF.h"

namespace ParaTerrain
{
    class TriangleFan
    {
    public:
        TriangleFan();
        TriangleFan(const TriangleFan& tf);
        ~TriangleFan();
        void Render(Terrain * pTerrain);
        int BuildTriangles(Terrain * pTerrain, terrain_vertex * pIndices, int nStart);
        int BuildTriangles(Terrain * pTerrain, terrain_vertex_normal * pIndices, int nStart);
        int GetTriangleNum();
    private:
        int m_pVertices[MAX_VERTICES_PER_FAN];  // Indices into the terrain vertices
        // TBD: It is a pretty awful waste of memory to preallocate MAX_VERTICES_PER_FAN vertices for every triangle fan,
        // when in most cases only a few vertices are needed. However, dynamically allocating these vertices
        // during every tessellation is not an option either because it causes huge performance problems and
        // badly fragments memory. Any good ideas for this?
        unsigned char m_NumberOfVertices;
        float fOffsetTexU, fOffsetTexV;
        // in range [0, 8*8)
        int texture_group_id;

        friend class TerrainBlock;
        friend class Terrain;
        friend class TerrainBuffer;
    };
}