IMeshBuffer.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 __I_MESH_BUFFER_H_INCLUDED__
#define __I_MESH_BUFFER_H_INCLUDED__

#include "IReferenceCounted.h"
#include "SMaterial.h"
#include "aabbox3d.h"
#include "S3DVertex.h"
#include "SVertexIndex.h"
#include "EHardwareBufferFlags.h"
#include "EPrimitiveTypes.h"

namespace irr
{
namespace scene
{

        class IMeshBuffer : public virtual IReferenceCounted
        {
        public:


                virtual video::SMaterial& getMaterial() = 0;


                virtual const video::SMaterial& getMaterial() const = 0;


                virtual video::E_VERTEX_TYPE getVertexType() const = 0;


                virtual const void* getVertices() const = 0;


                virtual void* getVertices() = 0;


                virtual u32 getVertexCount() const = 0;


                virtual video::E_INDEX_TYPE getIndexType() const =0;


                virtual const u16* getIndices() const = 0;


                virtual u16* getIndices() = 0;


                virtual u32 getIndexCount() const = 0;


                virtual const core::aabbox3df& getBoundingBox() const = 0;


                virtual void setBoundingBox(const core::aabbox3df& box) = 0;

                virtual void recalculateBoundingBox() = 0;

                virtual const core::vector3df& getPosition(u32 i) const = 0;

                virtual core::vector3df& getPosition(u32 i) = 0;

                virtual const core::vector3df& getNormal(u32 i) const = 0;

                virtual core::vector3df& getNormal(u32 i) = 0;

                virtual const core::vector2df& getTCoords(u32 i) const = 0;

                virtual core::vector2df& getTCoords(u32 i) = 0;


                virtual void append(const void* const vertices, u32 numVertices, const u16* const indices, u32 numIndices) = 0;


                virtual void append(const IMeshBuffer* const other) = 0;

                virtual E_HARDWARE_MAPPING getHardwareMappingHint_Vertex() const = 0;

                virtual E_HARDWARE_MAPPING getHardwareMappingHint_Index() const = 0;

                virtual void setHardwareMappingHint( E_HARDWARE_MAPPING newMappingHint, E_BUFFER_TYPE buffer=EBT_VERTEX_AND_INDEX ) = 0;

                virtual void setDirty(E_BUFFER_TYPE buffer=EBT_VERTEX_AND_INDEX) = 0;


                virtual u32 getChangedID_Vertex() const = 0;


                virtual u32 getChangedID_Index() const = 0;


                virtual void setPrimitiveType(E_PRIMITIVE_TYPE type) = 0;

                virtual E_PRIMITIVE_TYPE getPrimitiveType() const = 0;

                virtual u32 getPrimitiveCount() const
                {
                        const u32 indexCount = getIndexCount();
                        switch (getPrimitiveType())
                        {
                case scene::EPT_POINTS:         return indexCount;
                case scene::EPT_LINE_STRIP:     return indexCount-1;
                case scene::EPT_LINE_LOOP:      return indexCount;
                case scene::EPT_LINES:          return indexCount/2;
                case scene::EPT_TRIANGLE_STRIP: return (indexCount-2);
                case scene::EPT_TRIANGLE_FAN:   return (indexCount-2);
                case scene::EPT_TRIANGLES:      return indexCount/3;
                case scene::EPT_QUAD_STRIP:     return (indexCount-2)/2;
                case scene::EPT_QUADS:          return indexCount/4;
                case scene::EPT_POLYGON:        return indexCount; // (not really primitives, that would be 1, works like line_strip)
                case scene::EPT_POINT_SPRITES:  return indexCount;
                        }
                        return 0;
                }

        };

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

#endif