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[3298060] OBJ: Add support for p and l elements 

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1070 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
pull/2/head
aramis_acg 2011-08-23 16:23:13 +00:00
parent 1204c8cdaf
commit df63b4b3ed
8 changed files with 200 additions and 52 deletions
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9
code/ObjFileData.h
View File

@ -64,7 +64,7 @@ struct Face
typedef std::vector<unsigned int> IndexArray;
//! Primitive type
int m_PrimitiveType;
aiPrimitiveType m_PrimitiveType;
//! Vertex indices
IndexArray *m_pVertices;
//! Normal indices
@ -80,8 +80,9 @@ struct Face
//! \param pTexCoords Pointer to assigned texture indexbuffer
Face( std::vector<unsigned int> *pVertices,
std::vector<unsigned int> *pNormals,
std::vector<unsigned int> *pTexCoords) :
m_PrimitiveType( 2 ),
std::vector<unsigned int> *pTexCoords,
aiPrimitiveType pt = aiPrimitiveType_POLYGON) :
m_PrimitiveType( pt ),
m_pVertices( pVertices ),
m_pNormals( pNormals ),
m_pTexturCoords( pTexCoords ),
@ -195,7 +196,7 @@ struct Material
//! \brief Data structure to store a mesh
struct Mesh
{
static const unsigned int NoMaterial = 999999999;
static const unsigned int NoMaterial = ~0u;
/// Array with pointer to all stored faces
std::vector<Face*> m_Faces;

115
code/ObjFileImporter.cpp
View File

@ -251,7 +251,23 @@ void ObjFileImporter::createTopology(const ObjFile::Model* pModel,
// Create faces
ObjFile::Mesh *pObjMesh = pModel->m_Meshes[ uiMeshIndex ];
ai_assert( NULL != pObjMesh );
pMesh->mNumFaces = static_cast<unsigned int>( pObjMesh->m_Faces.size() );
pMesh->mNumFaces = 0;
for (size_t index = 0; index < pObjMesh->m_Faces.size(); index++)
{
ObjFile::Face* const inp = pObjMesh->m_Faces[ index ];
if (inp->m_PrimitiveType == aiPrimitiveType_LINE) {
pMesh->mNumFaces += inp->m_pVertices->size() - 1;
}
else if (inp->m_PrimitiveType == aiPrimitiveType_POINT) {
pMesh->mNumFaces += inp->m_pVertices->size();
}
else {
++pMesh->mNumFaces;
}
}
unsigned int uiIdxCount = 0u;
if ( pMesh->mNumFaces > 0 )
{
pMesh->mFaces = new aiFace[ pMesh->mNumFaces ];
@ -260,31 +276,40 @@ void ObjFileImporter::createTopology(const ObjFile::Model* pModel,
pMesh->mMaterialIndex = pObjMesh->m_uiMaterialIndex;
}
unsigned int outIndex = 0;
// Copy all data from all stored meshes
for (size_t index = 0; index < pObjMesh->m_Faces.size(); index++)
{
aiFace *pFace = &pMesh->mFaces[ index ];
ObjFile::Face* const inp = pObjMesh->m_Faces[ index ];
if (inp->m_PrimitiveType == aiPrimitiveType_LINE) {
for(size_t i = 0; i < inp->m_pVertices->size() - 1; ++i) {
aiFace& f = pMesh->mFaces[ outIndex++ ];
uiIdxCount += f.mNumIndices = 2;
f.mIndices = new unsigned int[2];
}
continue;
}
else if (inp->m_PrimitiveType == aiPrimitiveType_POINT) {
for(size_t i = 0; i < inp->m_pVertices->size(); ++i) {
aiFace& f = pMesh->mFaces[ outIndex++ ];
uiIdxCount += f.mNumIndices = 1;
f.mIndices = new unsigned int[1];
}
continue;
}
aiFace *pFace = &pMesh->mFaces[ outIndex++ ];
const unsigned int uiNumIndices = (unsigned int) pObjMesh->m_Faces[ index ]->m_pVertices->size();
pFace->mNumIndices = (unsigned int) uiNumIndices;
if (pFace->mNumIndices > 0)
{
uiIdxCount += pFace->mNumIndices = (unsigned int) uiNumIndices;
if (pFace->mNumIndices > 0) {
pFace->mIndices = new unsigned int[ uiNumIndices ];
ObjFile::Face::IndexArray *pIndexArray = pObjMesh->m_Faces[ index ]->m_pVertices;
ai_assert ( NULL != pIndexArray );
for ( size_t a=0; a<pFace->mNumIndices; a++ )
{
pFace->mIndices[ a ] = pIndexArray->at( a );
}
}
else
{
pFace->mIndices = NULL;
}
}
}
// Create mesh vertices
createVertexArray(pModel, pData, uiMeshIndex, pMesh);
createVertexArray(pModel, pData, uiMeshIndex, pMesh, uiIdxCount);
}
// ------------------------------------------------------------------------------------------------
@ -292,7 +317,8 @@ void ObjFileImporter::createTopology(const ObjFile::Model* pModel,
void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
const ObjFile::Object* pCurrentObject,
unsigned int uiMeshIndex,
aiMesh* pMesh)
aiMesh* pMesh,
unsigned int uiIdxCount)
{
// Checking preconditions
ai_assert( NULL != pCurrentObject );
@ -307,7 +333,7 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
return;
// Copy vertices of this mesh instance
pMesh->mNumVertices = (unsigned int) pObjMesh->m_uiNumIndices;
pMesh->mNumVertices = uiIdxCount;
pMesh->mVertices = new aiVector3D[ pMesh->mNumVertices ];
// Allocate buffer for normal vectors
@ -322,17 +348,14 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
}
// Copy vertices, normals and textures into aiMesh instance
unsigned int newIndex = 0;
unsigned int newIndex = 0, outIndex = 0;
for ( size_t index=0; index < pObjMesh->m_Faces.size(); index++ )
{
// Get destination face
aiFace *pDestFace = &pMesh->mFaces[ index ];
// Get source face
ObjFile::Face *pSourceFace = pObjMesh->m_Faces[ index ];
// Copy all index arrays
for ( size_t vertexIndex = 0; vertexIndex < pSourceFace->m_pVertices->size(); vertexIndex++ )
for ( size_t vertexIndex = 0, outVertexIndex = 0; vertexIndex < pSourceFace->m_pVertices->size(); vertexIndex++ )
{
const unsigned int vertex = pSourceFace->m_pVertices->at( vertexIndex );
if (vertex >= pModel->m_Vertices.size()) {
@ -359,19 +382,55 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
{
const unsigned int tex = pSourceFace->m_pTexturCoords->at( vertexIndex );
ai_assert( tex < pModel->m_TextureCoord.size() );
for ( size_t i=0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; i++ )
{
if ( pMesh->mNumUVComponents[ i ] > 0 )
for ( size_t i=0; i < pMesh->GetNumUVChannels(); i++ )
{
aiVector2D coord2d = pModel->m_TextureCoord[ tex ];
pMesh->mTextureCoords[ i ][ newIndex ] = aiVector3D( coord2d.x, coord2d.y, 0.0 );
}
}
}
}
ai_assert( pMesh->mNumVertices > newIndex );
pDestFace->mIndices[ vertexIndex ] = newIndex;
// Get destination face
aiFace *pDestFace = &pMesh->mFaces[ outIndex ];
const bool last = vertexIndex == pSourceFace->m_pVertices->size() - 1;
if (pSourceFace->m_PrimitiveType != aiPrimitiveType_LINE || !last) {
pDestFace->mIndices[ outVertexIndex++ ] = newIndex;
}
if (pSourceFace->m_PrimitiveType == aiPrimitiveType_POINT) {
outIndex++;
outVertexIndex = 0;
}
else if (pSourceFace->m_PrimitiveType == aiPrimitiveType_LINE) {
outVertexIndex = 0;
if(!last) {
outIndex++;
}
if (vertexIndex) {
if(!last) {
pMesh->mVertices[ newIndex+1 ] = pMesh->mVertices[ newIndex ];
if ( !pSourceFace->m_pNormals->empty() && !pModel->m_Normals.empty()) {
pMesh->mNormals[ newIndex+1 ] = pMesh->mNormals[newIndex ];
}
if ( !pModel->m_TextureCoord.empty() ) {
for ( size_t i=0; i < pMesh->GetNumUVChannels(); i++ ) {
pMesh->mTextureCoords[ i ][ newIndex+1 ] = pMesh->mTextureCoords[ i ][ newIndex ];
}
}
++newIndex;
}
pDestFace[-1].mIndices[1] = newIndex;
}
}
else if (last) {
outIndex++;
}
++newIndex;
}
}

2
code/ObjFileImporter.h
View File

@ -96,7 +96,7 @@ private:
//! \brief Creates vertices from model.
void createVertexArray(const ObjFile::Model* pModel, const ObjFile::Object* pCurrentObject,
unsigned int uiMeshIndex, aiMesh* pMesh);
unsigned int uiMeshIndex, aiMesh* pMesh,unsigned int uiIdxCount);
//! \brief Object counter helper method.
void countObjects(const std::vector<ObjFile::Object*> &rObjects, int &iNumMeshes);

38
code/ObjFileParser.cpp
View File

@ -46,7 +46,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "ObjFileMtlImporter.h"
#include "ObjTools.h"
#include "ObjFileData.h"
#include "fast_atof.h"
#include "ParsingUtils.h"
#include "../include/aiTypes.h"
#include "DefaultIOSystem.h"
@ -55,7 +55,6 @@ namespace Assimp
// -------------------------------------------------------------------
const std::string ObjFileParser::DEFAULT_MATERIAL = AI_DEFAULT_MATERIAL_NAME;
// fix: changed that to our standard default name
// -------------------------------------------------------------------
// Constructor with loaded data and directories.
@ -82,7 +81,7 @@ ObjFileParser::ObjFileParser(std::vector<char> &Data,const std::string &strModel
}
// -------------------------------------------------------------------
// Destrcutor.
// Destructor
ObjFileParser::~ObjFileParser()
{
delete m_pModel->m_pDefaultMaterial;
@ -133,9 +132,12 @@ void ObjFileParser::parseFile()
}
break;
case 'f': // Parse a face
case 'p': // Parse a face, line or point statement
case 'l':
case 'f':
{
getFace();
getFace(*m_DataIt == 'f' ? aiPrimitiveType_POLYGON : (*m_DataIt == 'l'
? aiPrimitiveType_LINE : aiPrimitiveType_POINT));
}
break;
@ -255,7 +257,7 @@ void ObjFileParser::getVector2( std::vector<aiVector2D> &point2d_array )
// -------------------------------------------------------------------
// Get values for a new face instance
void ObjFileParser::getFace()
void ObjFileParser::getFace(aiPrimitiveType type)
{
copyNextLine(m_buffer, BUFFERSIZE);
if (m_DataIt == m_DataItEnd)
@ -272,23 +274,24 @@ void ObjFileParser::getFace()
std::vector<unsigned int> *pNormalID = new std::vector<unsigned int>;
bool hasNormal = false;
bool vt = (!m_pModel->m_TextureCoord.empty());
bool vn = (!m_pModel->m_Normals.empty());
const bool vt = (!m_pModel->m_TextureCoord.empty());
const bool vn = (!m_pModel->m_Normals.empty());
int iStep = 0, iPos = 0;
while (pPtr != pEnd)
{
iStep = 1;
if (*pPtr == '\0')
break;
if (*pPtr=='\r' || *pPtr=='\n')
if (IsLineEnd(*pPtr))
break;
if (*pPtr=='/' )
{
if (type == aiPrimitiveType_POINT) {
DefaultLogger::get()->error("Obj: Separator unexpected in point statement");
}
if (iPos == 0)
{
//if there are no texturecoordinates in the obj file but normals
//if there are no texture coordinates in the file, but normals
if (!vt && vn) {
iPos = 1;
iStep++;
@ -330,11 +333,16 @@ void ObjFileParser::getFace()
}
}
}
for ( int i=0; i<iStep; i++ )
++pPtr;
pPtr += iStep;
}
ObjFile::Face *face = new ObjFile::Face( pIndices, pNormalID, pTexID );
if (pIndices->empty()) {
DefaultLogger::get()->error("Obj: Ignoring empty face");
m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
return;
}
ObjFile::Face *face = new ObjFile::Face( pIndices, pNormalID, pTexID, type );
// Set active material, if one set
if (NULL != m_pModel->m_pCurrentMaterial)

2
code/ObjFileParser.h
View File

@ -90,7 +90,7 @@ private:
/// Stores the following 3d vector.
void getVector2(std::vector<aiVector2D> &point2d_array);
/// Stores the following face.
void getFace();
void getFace(aiPrimitiveType type);
void getMaterialDesc();
/// Gets a comment.
void getComment();

22
test/models/OBJ/testline.obj 100644
View File

@ -0,0 +1,22 @@
# Vertex list
v -0.5 -0.5 0.5
v -0.5 -0.5 -0.5
v -0.5 0.5 -0.5
v -0.5 0.5 0.5
v 0.5 -0.5 0.5
v 0.5 -0.5 -0.5
v 0.5 0.5 -0.5
v 0.5 0.5 0.5
# Point/Line/Face list
usemtl Default
l 4 3 2 1
l 2 6 5 1
l 3 7 6 2
l 8 7 3 4
l 5 8 4 1
l 6 7 8 5
# End of file

36
test/models/OBJ/testmixed.obj 100644
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@ -0,0 +1,36 @@
# Vertex list
v -0.5 -0.5 0.5
v -0.5 -0.5 -0.5
v -0.5 0.5 -0.5
v -0.5 0.5 0.5
v 0.5 -0.5 0.5
v 0.5 -0.5 -0.5
v 0.5 0.5 -0.5
v 0.5 0.5 0.5
# Point/Line/Face list
usemtl Default
l 4 3 2 1
l 2 6 5 1
l 3 7 6 2
l 8 7 3 4
l 5 8 4 1
l 6 7 8 5
usemtl Default
p 4 3 2 1
p 2 6 5 1
f 3 7 6 2
p 3 7 6 2
p 8 7 3 4
p 5 8 4 1
p 6 7 8 5
f 4 3 2 1
f 2 6 5 1
f 8 7 3 4
f 5 8 4 1
f 6 7 8 5
# End of file

22
test/models/OBJ/testpoints.obj 100644
View File

@ -0,0 +1,22 @@
# Vertex list
v -0.5 -0.5 0.5
v -0.5 -0.5 -0.5
v -0.5 0.5 -0.5
v -0.5 0.5 0.5
v 0.5 -0.5 0.5
v 0.5 -0.5 -0.5
v 0.5 0.5 -0.5
v 0.5 0.5 0.5
# Point/Line/Face list
usemtl Default
p 4 3 2 1
p 2 6 5 1
p 3 7 6 2
p 8 7 3 4
p 5 8 4 1
p 6 7 8 5
# End of file