kicad/3d-viewer/3d_cache/sg/sg_helpers.h

241 lines
8.7 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015 Cirilo Bernardo <cirilo.bernardo@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file sg_helpers.h
* defines a number of macro functions to aid in repetitious code which
* is probably best expressed as a preprocessor macro rather than as
* a template. This header also declares a number of functions which are
* only of use within the sg_* classes.
*/
#ifndef SG_HELPERS_H
#define SG_HELPERS_H
#include <fstream>
#include <string>
#include <algorithm>
#include <vector>
#include "plugins/3dapi/sg_base.h"
#include "plugins/3dapi/sg_types.h"
#include <glm/glm.hpp>
class SGNORMALS;
class SGCOORDS;
class SGCOORDINDEX;
// Function to drop references within an SGNODE
// The node being destroyed must remove itself from the object reference's
// backpointer list in order to avoid a segfault.
#define DROP_REFS( aType, aList ) do { \
std::vector< aType* >::iterator sL = aList.begin(); \
std::vector< aType* >::iterator eL = aList.end(); \
while( sL != eL ) { \
((SGNODE*)*sL)->delNodeRef( this ); \
++sL; \
} \
aList.clear(); \
} while( 0 )
// Function to delete owned objects within an SGNODE
// The owned object's parent is set to NULL before
// deletion to avoid a redundant 'unlinkChildNode' call.
#define DEL_OBJS( aType, aList ) do { \
std::vector< aType* >::iterator sL = aList.begin(); \
std::vector< aType* >::iterator eL = aList.end(); \
while( sL != eL ) { \
((SGNODE*)*sL)->SetParent( NULL, false ); \
delete *sL; \
++sL; \
} \
aList.clear(); \
} while( 0 )
// Function to unlink a child or reference node when that child or
// reference node is being destroyed.
#define UNLINK_NODE( aNodeID, aType, aNode, aOwnedList, aRefList, isChild ) do { \
if( aNodeID == aNode->GetNodeType() ) { \
std::vector< aType* >* oSL; \
std::vector< aType* >::iterator sL; \
std::vector< aType* >::iterator eL; \
if( isChild ) { \
oSL = &aOwnedList; \
sL = aOwnedList.begin(); \
eL = aOwnedList.end(); \
} else { \
oSL = &aRefList; \
sL = aRefList.begin(); \
eL = aRefList.end(); \
} \
while( sL != eL ) { \
if( (SGNODE*)*sL == aNode ) { \
oSL->erase( sL ); \
return; \
} \
++sL; \
} \
return; \
} } while( 0 )
// Function to check a node type, check for an existing reference,
// and add the node type to the reference list if applicable
#define ADD_NODE( aNodeID, aType, aNode, aOwnedList, aRefList, isChild ) do { \
if( aNodeID == aNode->GetNodeType() ) { \
std::vector< aType* >::iterator sL; \
SGNODE* psg = NULL; \
sL = std::find( aOwnedList.begin(), aOwnedList.end(), aNode ); \
if( sL != aOwnedList.end() ) return true; \
sL = std::find( aRefList.begin(), aRefList.end(), aNode ); \
if( sL != aRefList.end() ) return true; \
if( isChild ) { \
SGNODE* ppn = (SGNODE*)aNode->GetParent(); \
if( NULL != ppn ) { \
if( this != ppn ) { \
std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n"; \
std::cerr << " * [BUG] object '" << aNode->GetName(); \
std::cerr << "' has multiple parents '" << ppn->GetName() << "', '"; \
std::cerr << m_Name << "'\n"; \
return false; \
} \
} \
aOwnedList.push_back( (aType*)aNode ); \
aNode->SetParent( this, false ); \
} else { \
if( NULL == aNode->GetParent() ) { \
std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n"; \
std::cerr << " * [BUG] object '" << aNode->GetName(); \
std::cerr << "' has no parent\n"; \
std::cerr << " * [INFO] possible copy assignment or copy constructor bug\n"; \
return false; \
} \
aRefList.push_back( (aType*)aNode ); \
aNode->addNodeRef( this ); \
} \
return true; \
} } while( 0 )
// Function to find a node object given a (non-unique) node name
#define FIND_NODE( aType, aName, aNodeList, aCallingNode ) do { \
std::vector< aType* >::iterator sLA = aNodeList.begin(); \
std::vector< aType* >::iterator eLA = aNodeList.end(); \
SGNODE* psg = NULL; \
while( sLA != eLA ) { \
if( (SGNODE*)*sLA != aCallingNode ) { \
psg = (SGNODE*) (*sLA)->FindNode( aName, this ); \
if( NULL != psg) \
return psg; \
} \
++sLA; \
} } while ( 0 )
namespace S3D
{
bool degenerate( glm::dvec3* pts );
//
// Normals calculations from triangles
//
/*
* Function CalcTriangleNormals
* takes an array of 3D coordinates and its corresponding index set and calculates
* the normals assuming that indices are given in CCW order. Care must be taken in
* using this function to ensure that:
* (a) all coordinates are indexed; unindexed coordinates are assigned normal(0,0,1);
* when dealing with VRML models which may list and reuse one large coordinate set it
* is necessary to gather all index sets and perform this operation only once.
* (b) index sets must represent triangles (multiple of 3 indices) and must not be
* degenerate - that is all indices and coordinates in a triad must be unique.
*
* @param coords is the array of 3D vertices
* @param index is the array of 3x vertex indices (triads)
* @param norms is an empty array which holds the normals corresponding to each vector
* @return true on success; otherwise false.
*/
bool CalcTriangleNormals( std::vector< SGPOINT > coords, std::vector< int >& index,
std::vector< SGVECTOR >& norms );
//
// VRML related functions
//
// formats a floating point number for text output to a VRML file
void FormatFloat( std::string& result, double value );
// format orientation data for VRML output
void FormatOrientation( std::string& result, const SGVECTOR& axis, double rotation );
// format point data for VRML output
void FormatPoint( std::string& result, const SGPOINT& point );
// format vector data for VRML output
void FormatVector( std::string& result, const SGVECTOR& aVector );
// format Color data for VRML output
void FormatColor( std::string& result, const SGCOLOR& aColor );
//
// Cache related WRITE functions
//
// write out an XYZ vertex
bool WritePoint( std::ofstream& aFile, const SGPOINT& aPoint );
// write out a unit vector
bool WriteVector( std::ofstream& aFile, const SGVECTOR& aVector );
// write out an RGB color
bool WriteColor( std::ofstream& aFile, const SGCOLOR& aColor );
//
// Cache related READ functions
//
/**
* Function ReadTag
* reads the text tag of a binary cache file which is the
* NodeTag and unique ID number combined
*
* @param aFile is a binary file open for reading
* @param aName will hold the tag name on successful return
* @return will be the NodeType which the tag represents or
* S3D::SGTYPES::SGTYPE_END on failure
*/
S3D::SGTYPES ReadTag( std::ifstream& aFile, std::string& aName );
// read an XYZ vertex
bool ReadPoint( std::ifstream& aFile, SGPOINT& aPoint );
// read a unit vector
bool ReadVector( std::ifstream& aFile, SGVECTOR& aVector );
// read an RGB color
bool ReadColor( std::ifstream& aFile, SGCOLOR& aColor );
};
#endif // SG_HELPERS_H