pyobject_util.cpp

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/** @file
 *  @author Bram de Greve (bramz@users.sourceforge.net)
 *  @author Tom De Muer (tomdemuer@users.sourceforge.net)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2007 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
 *  provisions required by the GPL License. If you do not delete the provisions above,
 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */

#include "prim_common.h"
#include "pyobject_util.h"
#include "triangle_mesh_3d.h"

namespace lass
{
namespace python
{
namespace impl
{

/** @ingroup Python
 *  @internal
 */
PyObject* buildIndexVertex(size_t iVertex, size_t iNormal, size_t iUv)
{
    python::PyObjectPtr<PyObject>::Type tuple;
    
    LASS_ASSERT(iVertex != prim::IndexTriangle::null());
    if (iNormal == prim::IndexTriangle::null())
    {
        if (iUv == prim::IndexTriangle::null())
        {
            tuple = python::makeTuple(iVertex);
        }
        else
        {
            tuple = python::makeTuple(iVertex, python::fromNakedToSharedPtrCast<PyObject>(Py_None), iUv);
        }
    }
    else
    {
        if (iUv == prim::IndexTriangle::null())
        {
            tuple = python::makeTuple(iVertex, iNormal);
        }
        else
        {
            tuple = python::makeTuple(iVertex, iNormal, iUv);
        }
    }
    return python::fromSharedPtrToNakedCast(tuple);
}

/** @ingroup Python
 *  @internal
 */
int getIndexVertex(PyObject* iIndices, size_t& oVertex, size_t& oNormal, size_t& oUv)
{
    size_t vertex = prim::IndexTriangle::null();
    size_t normal = prim::IndexTriangle::null();
    size_t uv = prim::IndexTriangle::null();

    TPyObjPtr tuple(PySequence_Fast(iIndices, "expected a sequence (tuple, list, ...)"));
    if (!tuple)
    {
        return 1;
    }
    const Py_ssize_t size = PySequence_Fast_GET_SIZE(tuple.get());
    if (size == -1)
    {
        return 1;
    }
    if (size == 0 || size > 3)
    {
        PyErr_SetString(PyExc_TypeError, "is not (v [, vn [, vt]])");
        return 1;
    }
    PyObject** objects = PySequence_Fast_ITEMS(tuple.get());
    if (pyGetSimpleObject(objects[0], vertex) != 0)
    {
        impl::addMessageHeader("v");
        return 1;
    }
    if (size > 1 && objects[1] != Py_None)
    {
        if (pyGetSimpleObject(objects[1], normal) != 0)
        {
            impl::addMessageHeader("vn");
            return 1;
        }
    }
    if (size > 2 && objects[2] != Py_None)
    {
        if (pyGetSimpleObject(objects[2], uv) != 0)
        {
            impl::addMessageHeader("vt");
            return 1;
        }
    }
    oVertex = vertex;
    oNormal = normal;
    oUv = uv;
    return 0;
}


}
}
}

// EOF