SSharedMeshBuffer.h

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __S_SHARED_MESH_BUFFER_H_INCLUDED__
#define __S_SHARED_MESH_BUFFER_H_INCLUDED__

#include "irrArray.h"
#include "IMeshBuffer.h"

namespace irr
{
namespace scene
{
    struct SSharedMeshBuffer : public IMeshBuffer
    {
        SSharedMeshBuffer() : IMeshBuffer(), Vertices(0), ChangedID_Vertex(1), ChangedID_Index(1), MappingHintVertex(EHM_NEVER), MappingHintIndex(EHM_NEVER)
        {
            #ifdef _DEBUG
            setDebugName("SSharedMeshBuffer");
            #endif
        }

        SSharedMeshBuffer(core::array<video::S3DVertex> *vertices) : IMeshBuffer(), Vertices(vertices)
        {
            #ifdef _DEBUG
            setDebugName("SSharedMeshBuffer");
            #endif
        }

        virtual const video::SMaterial& getMaterial() const
        {
            return Material;
        }

        virtual video::SMaterial& getMaterial()
        {
            return Material;
        }

        virtual const void* getVertices() const
        {
            if (Vertices)
                return Vertices->const_pointer();
            else
                return 0;
        }

        virtual void* getVertices()
        {
            if (Vertices)
                return Vertices->pointer();
            else
                return 0;
        }

        virtual u32 getVertexCount() const
        {
            if (Vertices)
                return Vertices->size();
            else
                return 0;
        }

        virtual const u16* getIndices() const
        {
            return Indices.const_pointer();
        }

        virtual u16* getIndices()
        {
            return Indices.pointer();
        }

        virtual u32 getIndexCount() const
        {
            return Indices.size();
        }

        virtual video::E_INDEX_TYPE getIndexType() const
        {
            return video::EIT_16BIT;
        }

        virtual const core::aabbox3d<f32>& getBoundingBox() const
        {
            return BoundingBox;
        }

        virtual void setBoundingBox( const core::aabbox3df& box)
        {
            BoundingBox = box;
        }

        virtual video::E_VERTEX_TYPE getVertexType() const
        {
            return video::EVT_STANDARD;
        }

        virtual void recalculateBoundingBox()
        {
            if (!Vertices || Vertices->empty() || Indices.empty())
                BoundingBox.reset(0,0,0);
            else
            {
                BoundingBox.reset((*Vertices)[Indices[0]].Pos);
                for (u32 i=1; i<Indices.size(); ++i)
                    BoundingBox.addInternalPoint((*Vertices)[Indices[i]].Pos);
            }
        }

        virtual const core::vector3df& getPosition(u32 i) const
        {
            _IRR_DEBUG_BREAK_IF(!Vertices);
            return (*Vertices)[Indices[i]].Pos;
        }

        virtual core::vector3df& getPosition(u32 i)
        {
            _IRR_DEBUG_BREAK_IF(!Vertices);
            return (*Vertices)[Indices[i]].Pos;
        }

        virtual const core::vector3df& getNormal(u32 i) const
        {
            _IRR_DEBUG_BREAK_IF(!Vertices);
            return (*Vertices)[Indices[i]].Normal;
        }

        virtual core::vector3df& getNormal(u32 i)
        {
            _IRR_DEBUG_BREAK_IF(!Vertices);
            return (*Vertices)[Indices[i]].Normal;
        }

        virtual const core::vector2df& getTCoords(u32 i) const
        {
            _IRR_DEBUG_BREAK_IF(!Vertices);
            return (*Vertices)[Indices[i]].TCoords;
        }

        virtual core::vector2df& getTCoords(u32 i)
        {
            _IRR_DEBUG_BREAK_IF(!Vertices);
            return (*Vertices)[Indices[i]].TCoords;
        }

        virtual void append(const void* const vertices, u32 numVertices, const u16* const indices, u32 numIndices) {}

        virtual void append(const IMeshBuffer* const other) {}

        virtual E_HARDWARE_MAPPING getHardwareMappingHint_Vertex() const
        {
            return MappingHintVertex;
        }

        virtual E_HARDWARE_MAPPING getHardwareMappingHint_Index() const
        {
            return MappingHintIndex;
        }

        virtual void setHardwareMappingHint( E_HARDWARE_MAPPING NewMappingHint, E_BUFFER_TYPE buffer=EBT_VERTEX_AND_INDEX )
        {
            if (buffer==EBT_VERTEX_AND_INDEX || buffer==EBT_VERTEX)
                MappingHintVertex=NewMappingHint;
            if (buffer==EBT_VERTEX_AND_INDEX || buffer==EBT_INDEX)
                MappingHintIndex=NewMappingHint;
        }

        virtual void setDirty(E_BUFFER_TYPE buffer=EBT_VERTEX_AND_INDEX)
        {
            if (buffer==EBT_VERTEX_AND_INDEX || buffer==EBT_VERTEX)
                ++ChangedID_Vertex;
            if (buffer==EBT_VERTEX_AND_INDEX || buffer==EBT_INDEX)
                ++ChangedID_Index;
        }


        virtual u32 getChangedID_Vertex() const {return ChangedID_Vertex;}


        virtual u32 getChangedID_Index() const {return ChangedID_Index;}

        video::SMaterial Material;

        core::array<video::S3DVertex> *Vertices;

        core::array<u16> Indices;

        u32 ChangedID_Vertex;

        u32 ChangedID_Index;

        core::aabbox3df BoundingBox;

        E_HARDWARE_MAPPING MappingHintVertex;
        E_HARDWARE_MAPPING MappingHintIndex;
    };


} // end namespace scene
} // end namespace irr

#endif