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Parse homogeneous vertex coordinates in OBJs

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This commit is contained in:
John Senneker
2016-10-04 17:06:31 -04:00
parent 38cbdcd885
commit c3ebdc56de
2 changed files with 25 additions and 0 deletions
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23
code/ObjFileParser.cpp
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@@ -140,6 +140,9 @@ void ObjFileParser::parseFile()
if (numComponents == 3) {
// read in vertex definition
getVector3(m_pModel->m_Vertices);
} else if (numComponents == 4) {
// read in vertex definition (homogeneous coords)
getHomogeneousVector3(m_pModel->m_Vertices);
} else if (numComponents == 6) {
// read vertex and vertex-color
getTwoVectors3(m_pModel->m_Vertices, m_pModel->m_VertexColors);
@@ -320,6 +323,26 @@ void ObjFileParser::getVector3( std::vector<aiVector3D> &point3d_array ) {
m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
}
void ObjFileParser::getHomogeneousVector3( std::vector<aiVector3D> &point3d_array ) {
ai_real x, y, z, w;
copyNextWord(m_buffer, Buffersize);
x = (ai_real) fast_atof(m_buffer);
copyNextWord(m_buffer, Buffersize);
y = (ai_real) fast_atof(m_buffer);
copyNextWord( m_buffer, Buffersize );
z = ( ai_real ) fast_atof( m_buffer );
copyNextWord( m_buffer, Buffersize );
w = ( ai_real ) fast_atof( m_buffer );
ai_assert( w != 0 );
point3d_array.push_back( aiVector3D( x/w, y/w, z/w ) );
m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
}
// -------------------------------------------------------------------
// Get values for two 3D vectors on the same line
void ObjFileParser::getTwoVectors3( std::vector<aiVector3D> &point3d_array_a, std::vector<aiVector3D> &point3d_array_b ) {