BRNSystems/irrlicht
1
0
Fork 0
forked from Mirrorlandia_minetest/irrlicht
Code Pull Requests Activity
21cb990e75
irrlicht/source/Irrlicht/CIrrMeshFileLoader.cpp
cutealien 2ae2a551a6 Merging r5975 through r6036 from trunk to ogl-es branch. 
GLES drivers adapted, but only did make compile-tests.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6038 dfc29bdd-3216-0410-991c-e03cc46cb475
2020-01-03 19:05:16 +00:00

557 lines
13 KiB
C++
Raw Blame History

// 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
#include "IrrCompileConfig.h"
#ifdef _IRR_COMPILE_WITH_IRR_MESH_LOADER_
#include "CIrrMeshFileLoader.h"
#include "os.h"
#include "IXMLReader.h"
#include "SAnimatedMesh.h"
#include "fast_atof.h"
#include "IReadFile.h"
#include "IAttributes.h"
#include "IMeshSceneNode.h"
#include "CDynamicMeshBuffer.h"
#include "SMeshBufferLightMap.h"
namespace irr
{
namespace scene
{
//! Constructor
CIrrMeshFileLoader::CIrrMeshFileLoader(scene::ISceneManager* smgr,
io::IFileSystem* fs)
: SceneManager(smgr), FileSystem(fs)
{
#ifdef _DEBUG
setDebugName("CIrrMeshFileLoader");
#endif
}
//! Returns true if the file maybe is able to be loaded by this class.
/** This decision should be based only on the file extension (e.g. ".cob") */
bool CIrrMeshFileLoader::isALoadableFileExtension(const io::path& filename) const
{
return core::hasFileExtension ( filename, "xml", "irrmesh" );
}
//! creates/loads an animated mesh from the file.
//! \return Pointer to the created mesh. Returns 0 if loading failed.
//! If you no longer need the mesh, you should call IAnimatedMesh::drop().
//! See IReferenceCounted::drop() for more information.
IAnimatedMesh* CIrrMeshFileLoader::createMesh(io::IReadFile* file)
{
io::IXMLReader* reader = FileSystem->createXMLReader(file);
if (!reader)
return 0;
// read until mesh section, skip other parts
const core::stringc meshTagName = "mesh";
IAnimatedMesh* mesh = 0;
while(reader->read())
{
if (reader->getNodeType() == io::EXN_ELEMENT)
{
if (meshTagName == reader->getNodeName())
{
mesh = readMesh(reader);
break;
}
else
skipSection(reader, true); // unknown section
}
}
reader->drop();
return mesh;
}
//! reads a mesh sections and creates a mesh from it
IAnimatedMesh* CIrrMeshFileLoader::readMesh(io::IXMLReader* reader)
{
SAnimatedMesh* animatedmesh = new SAnimatedMesh();
SMesh* mesh = new SMesh();
animatedmesh->addMesh(mesh);
mesh->drop();
core::stringc bbSectionName = "boundingBox";
core::stringc bufferSectionName = "buffer";
core::stringc meshSectionName = "mesh";
if (!reader->isEmptyElement())
while(reader->read())
{
if (reader->getNodeType() == io::EXN_ELEMENT)
{
const wchar_t* nodeName = reader->getNodeName();
if (bbSectionName == nodeName)
{
// inside a bounding box, ignore it for now because
// we are calculating this anyway ourselves later.
}
else
if (bufferSectionName == nodeName)
{
// we've got a mesh buffer
IMeshBuffer* buffer = readMeshBuffer(reader);
if (buffer)
{
mesh->addMeshBuffer(buffer);
buffer->drop();
}
}
else
skipSection(reader, true); // unknown section
} // end if node type is element
else
if (reader->getNodeType() == io::EXN_ELEMENT_END)
{
if (meshSectionName == reader->getNodeName())
{
// end of mesh section reached, cancel out
break;
}
}
} // end while reader->read();
mesh->recalculateBoundingBox();
animatedmesh->recalculateBoundingBox();
return animatedmesh;
}
//! reads a mesh sections and creates a mesh buffer from it
IMeshBuffer* CIrrMeshFileLoader::readMeshBuffer(io::IXMLReader* reader)
{
CDynamicMeshBuffer* buffer = 0;
core::stringc verticesSectionName = "vertices";
core::stringc bbSectionName = "boundingBox";
core::stringc materialSectionName = "material";
core::stringc indicesSectionName = "indices";
core::stringc bufferSectionName = "buffer";
bool insideVertexSection = false;
bool insideIndexSection = false;
int vertexCount = 0;
int indexCount = 0;
video::SMaterial material;
if (!reader->isEmptyElement())
while(reader->read())
{
if (reader->getNodeType() == io::EXN_ELEMENT)
{
const wchar_t* nodeName = reader->getNodeName();
if (bbSectionName == nodeName)
{
// inside a bounding box, ignore it for now because
// we are calculating this anyway ourselves later.
}
else
if (materialSectionName == nodeName)
{
//we've got a material
material = video::SMaterial(); // reset
io::IAttributes* attributes = FileSystem->createEmptyAttributes(SceneManager->getVideoDriver());
attributes->read(reader, true, L"material");
SceneManager->getVideoDriver()->fillMaterialStructureFromAttributes(material, attributes);
attributes->drop();
}
else
if (verticesSectionName == nodeName)
{
// vertices section
const core::stringc vertexTypeName1 = "standard";
const core::stringc vertexTypeName2 = "2tcoords";
const core::stringc vertexTypeName3 = "tangents";
const wchar_t* vertexType = reader->getAttributeValue(L"type");
vertexCount = reader->getAttributeValueAsInt(L"vertexCount");
insideVertexSection = true;
video::E_INDEX_TYPE itype = (vertexCount > 65536)?irr::video::EIT_32BIT:irr::video::EIT_16BIT;
if (vertexTypeName1 == vertexType)
{
buffer = new CDynamicMeshBuffer(irr::video::EVT_STANDARD, itype);
}
else
if (vertexTypeName2 == vertexType)
{
buffer = new CDynamicMeshBuffer(irr::video::EVT_2TCOORDS, itype);
}
else
if (vertexTypeName3 == vertexType)
{
buffer = new CDynamicMeshBuffer(irr::video::EVT_TANGENTS, itype);
}
buffer->getVertexBuffer().reallocate(vertexCount);
buffer->Material = material;
}
else
if (indicesSectionName == nodeName)
{
// indices section
indexCount = reader->getAttributeValueAsInt(L"indexCount");
insideIndexSection = true;
}
} // end if node type is element
else
if (reader->getNodeType() == io::EXN_TEXT)
{
// read vertex data
if (insideVertexSection)
{
readMeshBuffer(reader, vertexCount, buffer);
insideVertexSection = false;
} // end reading vertex array
else
if (insideIndexSection)
{
readIndices(reader, indexCount, buffer->getIndexBuffer());
insideIndexSection = false;
}
} // end if node type is text
else
if (reader->getNodeType() == io::EXN_ELEMENT_END)
{
if (bufferSectionName == reader->getNodeName())
{
// end of buffer section reached, cancel out
break;
}
}
} // end while reader->read();
if (buffer)
buffer->recalculateBoundingBox();
return buffer;
}
//! read indices
void CIrrMeshFileLoader::readIndices(io::IXMLReader* reader, int indexCount, IIndexBuffer& indices)
{
indices.reallocate(indexCount);
core::stringc data = reader->getNodeData();
const c8* p = &data[0];
for (int i=0; i<indexCount && *p; ++i)
{
findNextNoneWhiteSpace(&p);
indices.push_back(readInt(&p));
}
}
void CIrrMeshFileLoader::readMeshBuffer(io::IXMLReader* reader, int vertexCount, CDynamicMeshBuffer* sbuffer)
{
core::stringc data = reader->getNodeData();
const c8* p = &data[0];
scene::IVertexBuffer& Vertices = sbuffer->getVertexBuffer();
video::E_VERTEX_TYPE vType = Vertices.getType();
if (sbuffer)
{
for (int i=0; i<vertexCount && *p; ++i)
{
switch(vType)
{
case video::EVT_STANDARD:
{
video::S3DVertex vtx;
// position
findNextNoneWhiteSpace(&p);
vtx.Pos.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Pos.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Pos.Z = readFloat(&p);
// normal
findNextNoneWhiteSpace(&p);
vtx.Normal.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Normal.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Normal.Z = readFloat(&p);
// color
u32 col;
findNextNoneWhiteSpace(&p);
sscanf(p, "%08x", &col);
vtx.Color.set(col);
skipCurrentNoneWhiteSpace(&p);
// tcoord1
findNextNoneWhiteSpace(&p);
vtx.TCoords.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.TCoords.Y = readFloat(&p);
Vertices.push_back(vtx);
}
break;
case video::EVT_2TCOORDS:
{
video::S3DVertex2TCoords vtx;
// position
findNextNoneWhiteSpace(&p);
vtx.Pos.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Pos.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Pos.Z = readFloat(&p);
// normal
findNextNoneWhiteSpace(&p);
vtx.Normal.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Normal.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Normal.Z = readFloat(&p);
// color
u32 col;
findNextNoneWhiteSpace(&p);
sscanf(p, "%08x", &col);
vtx.Color.set(col);
skipCurrentNoneWhiteSpace(&p);
// tcoord1
findNextNoneWhiteSpace(&p);
vtx.TCoords.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.TCoords.Y = readFloat(&p);
// tcoord2
findNextNoneWhiteSpace(&p);
vtx.TCoords2.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.TCoords2.Y = readFloat(&p);
Vertices.push_back(vtx);
}
break;
case video::EVT_TANGENTS:
{
video::S3DVertexTangents vtx;
// position
findNextNoneWhiteSpace(&p);
vtx.Pos.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Pos.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Pos.Z = readFloat(&p);
// normal
findNextNoneWhiteSpace(&p);
vtx.Normal.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Normal.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Normal.Z = readFloat(&p);
// color
u32 col;
findNextNoneWhiteSpace(&p);
sscanf(p, "%08x", &col);
vtx.Color.set(col);
skipCurrentNoneWhiteSpace(&p);
// tcoord1
findNextNoneWhiteSpace(&p);
vtx.TCoords.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.TCoords.Y = readFloat(&p);
// tangent
findNextNoneWhiteSpace(&p);
vtx.Tangent.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Tangent.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Tangent.Z = readFloat(&p);
// binormal
findNextNoneWhiteSpace(&p);
vtx.Binormal.X = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Binormal.Y = readFloat(&p);
findNextNoneWhiteSpace(&p);
vtx.Binormal.Z = readFloat(&p);
Vertices.push_back(vtx);
}
break;
};
}
}
}
//! skips an (unknown) section in the irrmesh document
void CIrrMeshFileLoader::skipSection(io::IXMLReader* reader, bool reportSkipping)
{
#ifdef _DEBUG
os::Printer::log("irrMesh skipping section", core::stringc(reader->getNodeName()).c_str());
#endif
// skip if this element is empty anyway.
if (reader->isEmptyElement())
return;
// read until we've reached the last element in this section
u32 tagCounter = 1;
while(tagCounter && reader->read())
{
if (reader->getNodeType() == io::EXN_ELEMENT &&
!reader->isEmptyElement())
{
#ifdef _DEBUG
if (reportSkipping)
os::Printer::log("irrMesh unknown element:", core::stringc(reader->getNodeName()).c_str());
#endif
++tagCounter;
}
else
if (reader->getNodeType() == io::EXN_ELEMENT_END)
--tagCounter;
}
}
//! parses a float from a char pointer and moves the pointer
//! to the end of the parsed float
inline f32 CIrrMeshFileLoader::readFloat(const c8** p)
{
f32 ftmp;
*p = core::fast_atof_move(*p, ftmp);
return ftmp;
}
//! parses an int from a char pointer and moves the pointer to
//! the end of the parsed float
inline s32 CIrrMeshFileLoader::readInt(const c8** p)
{
return (s32)readFloat(p);
}
//! places pointer to next begin of a token
void CIrrMeshFileLoader::skipCurrentNoneWhiteSpace(const c8** start)
{
const c8* p = *start;
while(*p && !(*p==' ' || *p=='\n' || *p=='\r' || *p=='\t'))
++p;
// TODO: skip comments <!-- -->
*start = p;
}
//! places pointer to next begin of a token
void CIrrMeshFileLoader::findNextNoneWhiteSpace(const c8** start)
{
const c8* p = *start;
while(*p && (*p==' ' || *p=='\n' || *p=='\r' || *p=='\t'))
++p;
// TODO: skip comments <!-- -->
*start = p;
}
//! reads floats from inside of xml element until end of xml element
void CIrrMeshFileLoader::readFloatsInsideElement(io::IXMLReader* reader, f32* floats, u32 count)
{
if (reader->isEmptyElement())
return;
while(reader->read())
{
// TODO: check for comments inside the element
// and ignore them.
if (reader->getNodeType() == io::EXN_TEXT)
{
// parse float data
core::stringc data = reader->getNodeData();
const c8* p = &data[0];
for (u32 i=0; i<count; ++i)
{
findNextNoneWhiteSpace(&p);
if (*p)
floats[i] = readFloat(&p);
else
floats[i] = 0.0f;
}
}
else
if (reader->getNodeType() == io::EXN_ELEMENT_END)
break; // end parsing text
}
}
} // end namespace scene
} // end namespace irr
#endif // _IRR_COMPILE_WITH_IRR_MESH_LOADER_
View Git Blame Copy Permalink