irrlicht/include/CMeshBuffer.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 IRR_T_MESH_BUFFER_H_INCLUDED
#define IRR_T_MESH_BUFFER_H_INCLUDED
#include "irrArray.h"
#include "IMeshBuffer.h"
namespace irr
{
namespace scene
{
//! Template implementation of the IMeshBuffer interface for 16-bit buffers
template <class T>
class CMeshBuffer : public IMeshBuffer
{
public:
//! Default constructor for empty meshbuffer
CMeshBuffer()
: ChangedID_Vertex(1), ChangedID_Index(1)
, MappingHint_Vertex(EHM_NEVER), MappingHint_Index(EHM_NEVER)
, PrimitiveType(EPT_TRIANGLES)
{
#ifdef _DEBUG
setDebugName("CMeshBuffer");
#endif
}
//! Get material of this meshbuffer
/** \return Material of this buffer */
virtual const video::SMaterial& getMaterial() const IRR_OVERRIDE
{
return Material;
}
//! Get material of this meshbuffer
/** \return Material of this buffer */
virtual video::SMaterial& getMaterial() IRR_OVERRIDE
{
return Material;
}
//! Get pointer to vertices
/** \return Pointer to vertices. */
virtual const void* getVertices() const IRR_OVERRIDE
{
return Vertices.const_pointer();
}
//! Get pointer to vertices
/** \return Pointer to vertices. */
virtual void* getVertices() IRR_OVERRIDE
{
return Vertices.pointer();
}
//! Get number of vertices
/** \return Number of vertices. */
virtual u32 getVertexCount() const IRR_OVERRIDE
{
return Vertices.size();
}
//! Get type of index data which is stored in this meshbuffer.
/** \return Index type of this buffer. */
virtual video::E_INDEX_TYPE getIndexType() const IRR_OVERRIDE
{
return video::EIT_16BIT;
}
//! Get pointer to indices
/** \return Pointer to indices. */
virtual const u16* getIndices() const IRR_OVERRIDE
{
return Indices.const_pointer();
}
//! Get pointer to indices
/** \return Pointer to indices. */
virtual u16* getIndices() IRR_OVERRIDE
{
return Indices.pointer();
}
//! Get number of indices
/** \return Number of indices. */
virtual u32 getIndexCount() const IRR_OVERRIDE
{
return Indices.size();
}
//! Get the axis aligned bounding box
/** \return Axis aligned bounding box of this buffer. */
virtual const core::aabbox3d<f32>& getBoundingBox() const IRR_OVERRIDE
{
return BoundingBox;
}
//! Set the axis aligned bounding box
/** \param box New axis aligned bounding box for this buffer. */
//! set user axis aligned bounding box
virtual void setBoundingBox(const core::aabbox3df& box) IRR_OVERRIDE
{
BoundingBox = box;
}
//! Recalculate the bounding box.
/** should be called if the mesh changed. */
virtual void recalculateBoundingBox() IRR_OVERRIDE
{
if (!Vertices.empty())
{
BoundingBox.reset(Vertices[0].Pos);
const irr::u32 vsize = Vertices.size();
for (u32 i=1; i<vsize; ++i)
BoundingBox.addInternalPoint(Vertices[i].Pos);
}
else
BoundingBox.reset(0,0,0);
}
//! Get type of vertex data stored in this buffer.
/** \return Type of vertex data. */
virtual video::E_VERTEX_TYPE getVertexType() const IRR_OVERRIDE
{
return T::getType();
}
//! returns position of vertex i
virtual const core::vector3df& getPosition(u32 i) const IRR_OVERRIDE
{
return Vertices[i].Pos;
}
//! returns position of vertex i
virtual core::vector3df& getPosition(u32 i) IRR_OVERRIDE
{
return Vertices[i].Pos;
}
//! returns normal of vertex i
virtual const core::vector3df& getNormal(u32 i) const IRR_OVERRIDE
{
return Vertices[i].Normal;
}
//! returns normal of vertex i
virtual core::vector3df& getNormal(u32 i) IRR_OVERRIDE
{
return Vertices[i].Normal;
}
//! returns texture coord of vertex i
virtual const core::vector2df& getTCoords(u32 i) const IRR_OVERRIDE
{
return Vertices[i].TCoords;
}
//! returns texture coord of vertex i
virtual core::vector2df& getTCoords(u32 i) IRR_OVERRIDE
{
return Vertices[i].TCoords;
}
//! returns color of vertex i
virtual video::SColor& getColor(u32 i) IRR_OVERRIDE
{
return Vertices[i].Color;
}
//! returns color of vertex i
virtual const video::SColor& getColor(u32 i) const IRR_OVERRIDE
{
return Vertices[i].Color;
}
//! Append the vertices and indices to the current buffer
/** Only works for compatible types, i.e. either the same type
or the main buffer is of standard type. Otherwise, behavior is
undefined. Also can't append it's own vertices/indices to itself.
*/
virtual void append(const void* const vertices, u32 numVertices, const u16* const indices, u32 numIndices) IRR_OVERRIDE
{
if (vertices == getVertices() || indices == getIndices()) // can't do that because we're doing reallocations on those blocks
return;
const u32 vertexCount = getVertexCount();
u32 i;
Vertices.reallocate(vertexCount+numVertices);
for (i=0; i<numVertices; ++i)
{
Vertices.push_back(static_cast<const T*>(vertices)[i]);
BoundingBox.addInternalPoint(static_cast<const T*>(vertices)[i].Pos);
}
Indices.reallocate(getIndexCount()+numIndices);
for (i=0; i<numIndices; ++i)
{
Indices.push_back(indices[i]+vertexCount);
}
setDirty();
}
//! Append the meshbuffer to the current buffer
virtual void append(const IMeshBuffer* const other) IRR_OVERRIDE
{
if ( getVertexType() != other->getVertexType() )
return;
append(other->getVertices(), other->getVertexCount(), other->getIndices(), other->getIndexCount());
}
//! get the current hardware mapping hint
virtual E_HARDWARE_MAPPING getHardwareMappingHint_Vertex() const IRR_OVERRIDE
{
return MappingHint_Vertex;
}
//! get the current hardware mapping hint
virtual E_HARDWARE_MAPPING getHardwareMappingHint_Index() const IRR_OVERRIDE
{
return MappingHint_Index;
}
//! set the hardware mapping hint, for driver
virtual void setHardwareMappingHint( E_HARDWARE_MAPPING NewMappingHint, E_BUFFER_TYPE Buffer=EBT_VERTEX_AND_INDEX ) IRR_OVERRIDE
{
if (Buffer==EBT_VERTEX_AND_INDEX || Buffer==EBT_VERTEX)
MappingHint_Vertex=NewMappingHint;
if (Buffer==EBT_VERTEX_AND_INDEX || Buffer==EBT_INDEX)
MappingHint_Index=NewMappingHint;
}
//! Describe what kind of primitive geometry is used by the meshbuffer
virtual void setPrimitiveType(E_PRIMITIVE_TYPE type) IRR_OVERRIDE
{
PrimitiveType = type;
}
//! Get the kind of primitive geometry which is used by the meshbuffer
virtual E_PRIMITIVE_TYPE getPrimitiveType() const IRR_OVERRIDE
{
return PrimitiveType;
}
//! flags the mesh as changed, reloads hardware buffers
virtual void setDirty(E_BUFFER_TYPE Buffer=EBT_VERTEX_AND_INDEX) IRR_OVERRIDE
{
if (Buffer==EBT_VERTEX_AND_INDEX ||Buffer==EBT_VERTEX)
++ChangedID_Vertex;
if (Buffer==EBT_VERTEX_AND_INDEX || Buffer==EBT_INDEX)
++ChangedID_Index;
}
//! Get the currently used ID for identification of changes.
/** This shouldn't be used for anything outside the VideoDriver. */
virtual u32 getChangedID_Vertex() const IRR_OVERRIDE {return ChangedID_Vertex;}
//! Get the currently used ID for identification of changes.
/** This shouldn't be used for anything outside the VideoDriver. */
virtual u32 getChangedID_Index() const IRR_OVERRIDE {return ChangedID_Index;}
//! Returns type of the class implementing the IMeshBuffer
virtual EMESH_BUFFER_TYPE getType() const IRR_OVERRIDE
{
return getTypeT();
}
//! Create copy of the meshbuffer
virtual IMeshBuffer* createClone(int cloneFlags) const IRR_OVERRIDE
{
CMeshBuffer<T> * clone = new CMeshBuffer<T>();
if (cloneFlags & ECF_VERTICES)
{
clone->Vertices = Vertices;
clone->BoundingBox = BoundingBox;
}
if (cloneFlags & ECF_INDICES)
{
clone->Indices = Indices;
}
clone->PrimitiveType = PrimitiveType;
clone->Material = getMaterial();
clone->MappingHint_Vertex = MappingHint_Vertex;
clone->MappingHint_Index = MappingHint_Index;
return clone;
}
//! Returns type of the class implementing the IMeshBuffer for template specialization
// Minor note: Some compilers (VS) allow directly specializing the virtual function,
// but this will fail on other compilers (GCC). So using a helper function.
EMESH_BUFFER_TYPE getTypeT() const;
u32 ChangedID_Vertex;
u32 ChangedID_Index;
//! hardware mapping hint
E_HARDWARE_MAPPING MappingHint_Vertex;
E_HARDWARE_MAPPING MappingHint_Index;
//! Material for this meshbuffer.
video::SMaterial Material;
//! Vertices of this buffer
core::array<T> Vertices;
//! Indices into the vertices of this buffer.
core::array<u16> Indices;
//! Bounding box of this meshbuffer.
core::aabbox3d<f32> BoundingBox;
//! Primitive type used for rendering (triangles, lines, ...)
E_PRIMITIVE_TYPE PrimitiveType;
};
//! Standard meshbuffer
typedef CMeshBuffer<video::S3DVertex> SMeshBuffer;
//! Meshbuffer with two texture coords per vertex, e.g. for lightmaps
typedef CMeshBuffer<video::S3DVertex2TCoords> SMeshBufferLightMap;
//! Meshbuffer with vertices having tangents stored, e.g. for normal mapping
typedef CMeshBuffer<video::S3DVertexTangents> SMeshBufferTangents;
//! partial specialization to return types
template <>
inline EMESH_BUFFER_TYPE CMeshBuffer<video::S3DVertex>::getTypeT() const
{
return EMBT_STANDARD;
}
template <>
inline EMESH_BUFFER_TYPE CMeshBuffer<video::S3DVertex2TCoords>::getTypeT() const
{
return EMBT_LIGHTMAP;
}
template <>
inline EMESH_BUFFER_TYPE CMeshBuffer<video::S3DVertexTangents>::getTypeT() const
{
return EMBT_TANGENTS;
}
} // end namespace scene
} // end namespace irr
#endif