minetest/irr/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
#pragma once
#include <vector>
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#include "IMeshBuffer.h"
namespace irr
{
namespace scene
{
//! Template implementation of the IMeshBuffer interface
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), HWBuffer(NULL), PrimitiveType(EPT_TRIANGLES)
{
#ifdef _DEBUG
setDebugName("CMeshBuffer");
#endif
}
//! Get material of this meshbuffer
/** \return Material of this buffer */
const video::SMaterial &getMaterial() const override
{
return Material;
}
//! Get material of this meshbuffer
/** \return Material of this buffer */
video::SMaterial &getMaterial() override
{
return Material;
}
//! Get pointer to vertices
/** \return Pointer to vertices. */
const void *getVertices() const override
{
return Vertices.data();
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}
//! Get pointer to vertices
/** \return Pointer to vertices. */
void *getVertices() override
{
return Vertices.data();
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}
//! Get number of vertices
/** \return Number of vertices. */
u32 getVertexCount() const override
{
return static_cast<u32>(Vertices.size());
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}
//! Get type of index data which is stored in this meshbuffer.
/** \return Index type of this buffer. */
video::E_INDEX_TYPE getIndexType() const override
{
return video::EIT_16BIT;
}
//! Get pointer to indices
/** \return Pointer to indices. */
const u16 *getIndices() const override
{
return Indices.data();
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}
//! Get pointer to indices
/** \return Pointer to indices. */
u16 *getIndices() override
{
return Indices.data();
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}
//! Get number of indices
/** \return Number of indices. */
u32 getIndexCount() const override
{
return static_cast<u32>(Indices.size());
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}
//! Get the axis aligned bounding box
/** \return Axis aligned bounding box of this buffer. */
const core::aabbox3d<f32> &getBoundingBox() const 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
void setBoundingBox(const core::aabbox3df &box) override
{
BoundingBox = box;
}
//! Recalculate the bounding box.
/** should be called if the mesh changed. */
void recalculateBoundingBox() 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. */
video::E_VERTEX_TYPE getVertexType() const override
{
return T::getType();
}
//! returns position of vertex i
const core::vector3df &getPosition(u32 i) const override
{
return Vertices[i].Pos;
}
//! returns position of vertex i
core::vector3df &getPosition(u32 i) override
{
return Vertices[i].Pos;
}
//! returns normal of vertex i
const core::vector3df &getNormal(u32 i) const override
{
return Vertices[i].Normal;
}
//! returns normal of vertex i
core::vector3df &getNormal(u32 i) override
{
return Vertices[i].Normal;
}
//! returns texture coord of vertex i
const core::vector2df &getTCoords(u32 i) const override
{
return Vertices[i].TCoords;
}
//! returns texture coord of vertex i
core::vector2df &getTCoords(u32 i) override
{
return Vertices[i].TCoords;
}
//! Append the vertices and indices to the current buffer
void append(const void *const vertices, u32 numVertices, const u16 *const indices, u32 numIndices) override
{
if (vertices == getVertices())
return;
const u32 vertexCount = getVertexCount();
const u32 indexCount = getIndexCount();
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auto *vt = static_cast<const T *>(vertices);
Vertices.insert(Vertices.end(), vt, vt + numVertices);
for (u32 i = vertexCount; i < getVertexCount(); i++)
BoundingBox.addInternalPoint(Vertices[i].Pos);
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Indices.insert(Indices.end(), indices, indices + numIndices);
if (vertexCount != 0) {
for (u32 i = indexCount; i < getIndexCount(); i++)
Indices[i] += vertexCount;
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}
}
//! get the current hardware mapping hint
E_HARDWARE_MAPPING getHardwareMappingHint_Vertex() const override
{
return MappingHint_Vertex;
}
//! get the current hardware mapping hint
E_HARDWARE_MAPPING getHardwareMappingHint_Index() const override
{
return MappingHint_Index;
}
//! set the hardware mapping hint, for driver
void setHardwareMappingHint(E_HARDWARE_MAPPING NewMappingHint, E_BUFFER_TYPE Buffer = EBT_VERTEX_AND_INDEX) 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
void setPrimitiveType(E_PRIMITIVE_TYPE type) override
{
PrimitiveType = type;
}
//! Get the kind of primitive geometry which is used by the meshbuffer
E_PRIMITIVE_TYPE getPrimitiveType() const override
{
return PrimitiveType;
}
//! flags the mesh as changed, reloads hardware buffers
void setDirty(E_BUFFER_TYPE Buffer = EBT_VERTEX_AND_INDEX) 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. */
u32 getChangedID_Vertex() const override { return ChangedID_Vertex; }
//! Get the currently used ID for identification of changes.
/** This shouldn't be used for anything outside the VideoDriver. */
u32 getChangedID_Index() const override { return ChangedID_Index; }
void setHWBuffer(void *ptr) const override
{
HWBuffer = ptr;
}
void *getHWBuffer() const override
{
return HWBuffer;
}
u32 ChangedID_Vertex;
u32 ChangedID_Index;
//! hardware mapping hint
E_HARDWARE_MAPPING MappingHint_Vertex;
E_HARDWARE_MAPPING MappingHint_Index;
mutable void *HWBuffer;
//! Material for this meshbuffer.
video::SMaterial Material;
//! Vertices of this buffer
std::vector<T> Vertices;
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//! Indices into the vertices of this buffer.
std::vector<u16> Indices;
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//! 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;
} // end namespace scene
} // end namespace irr