surfplot.cpp File Reference

#include "moab/Core.hpp"
#include "moab/Range.hpp"
#include "MBTagConventions.hpp"
#include <iostream>
#include <fstream>
#include <limits>
#include <cstdlib>
#include <cmath>

Include dependency graph for surfplot.cpp:

Go to the source code of this file.

Classes
struct	CartVect3D

Macros
#define	USAGE_ERROR   1
#define	READ_ERROR   2
#define	WRITE_ERROR   3
#define	SURFACE_NOT_FOUND   4
#define	OTHER_ERROR   5

Enumerations
enum	FileType { POSTSCRIPT , GNUPLOT , SVG }

Functions
static void	usage_error (const char *name)
static CartVect3D	operator- (const CartVect3D &a, const CartVect3D &b)
static double	operator% (const CartVect3D &a, const CartVect3D &b)
static CartVect3D	operator* (const CartVect3D &a, const CartVect3D &b)
static void	find_rotation (CartVect3D plane_normal, double matrix[3][3])
static void	transform_point (CartVect3D &point, double matrix[3][3])
static void	write_gnuplot (std::ostream &stream, const std::vector< CartVect3D > &list)
static void	write_svg (std::ostream &stream, const std::vector< CartVect3D > &list)
static void	write_eps (std::ostream &stream, const std::vector< CartVect3D > &list, int surface_id)
int	main (int argc, char *argv[])
static void	box_max (CartVect3D &cur_max, const CartVect3D &pt)
static void	box_min (CartVect3D &cur_min, const CartVect3D &pt)

Macro Definition Documentation

OTHER_ERROR

#define OTHER_ERROR   5

Definition at line 15 of file surfplot.cpp.

READ_ERROR

#define READ_ERROR   2

Definition at line 12 of file surfplot.cpp.

SURFACE_NOT_FOUND

#define SURFACE_NOT_FOUND   4

Definition at line 14 of file surfplot.cpp.

USAGE_ERROR

#define USAGE_ERROR   1

Definition at line 11 of file surfplot.cpp.

WRITE_ERROR

#define WRITE_ERROR   3

Definition at line 13 of file surfplot.cpp.

Enumeration Type Documentation

FileType

enum FileType

Enumerator
POSTSCRIPT
GNUPLOT
SVG

Definition at line 195 of file surfplot.cpp.

{
 POSTSCRIPT,
 GNUPLOT,
 SVG
};

Function Documentation

box_max()

static void box_max ( CartVect3D &  cur_max, const CartVect3D &  pt  )

static

Definition at line 390 of file surfplot.cpp.

{
 if( pt.x > cur_max.x ) cur_max.x = pt.x;
 if( pt.y > cur_max.y ) cur_max.y = pt.y;
 // if (pt.z > cur_max.z)
 // cur_max.z = pt.z;
}

References CartVect3D::x, and CartVect3D::y.

Referenced by moab::AdaptiveKDTree::best_subdivision_plane(), moab::AdaptiveKDTree::best_subdivision_snap_plane(), moab::AdaptiveKDTree::best_vertex_median_plane(), moab::AdaptiveKDTree::best_vertex_sample_plane(), moab::SmoothFace::bounding_box(), moab::corners_from_box(), moab::Tree::create_root(), moab::BSPTree::create_tree(), moab::AdaptiveKDTree::intersect_children_with_elems(), main(), moab::ElemUtil::point_in_trilinear_hex(), moab::GeomUtil::ray_box_intersect(), moab::GeomUtil::segment_box_intersect(), moab::BSPTree::set_tree_box(), write_eps(), and write_svg().

box_min()

static void box_min ( CartVect3D &  cur_min, const CartVect3D &  pt  )

static

Definition at line 398 of file surfplot.cpp.

{
 if( pt.x < cur_min.x ) cur_min.x = pt.x;
 if( pt.y < cur_min.y ) cur_min.y = pt.y;
 // if (pt.z > cur_min.z)
 // cur_min.z = pt.z;
}

References CartVect3D::x, and CartVect3D::y.

Referenced by moab::AdaptiveKDTree::best_subdivision_plane(), moab::AdaptiveKDTree::best_subdivision_snap_plane(), moab::AdaptiveKDTree::best_vertex_median_plane(), moab::AdaptiveKDTree::best_vertex_sample_plane(), moab::SmoothFace::bounding_box(), moab::corners_from_box(), moab::Tree::create_root(), moab::BSPTree::create_tree(), moab::AdaptiveKDTree::intersect_children_with_elems(), main(), moab::ElemUtil::point_in_trilinear_hex(), moab::GeomUtil::ray_box_intersect(), moab::GeomUtil::segment_box_intersect(), moab::BSPTree::set_tree_box(), write_eps(), and write_svg().

find_rotation()

static void find_rotation ( CartVect3D  plane_normal, double  matrix[3][3]  )

static

Definition at line 128 of file surfplot.cpp.

{
 // normalize
 plane_normal /= plane_normal.len();
 if( fabs( plane_normal.x ) < 0.1 ) plane_normal.x = 0.0;
 if( fabs( plane_normal.y ) < 0.1 ) plane_normal.y = 0.0;
 if( fabs( plane_normal.z ) < 0.1 ) plane_normal.z = 0.0;
 
 // calculate vector to rotate about
 const CartVect3D Z( 0, 0, 1 );
 CartVect3D vector = plane_normal * Z;
 const double len = vector.len();
 
 // If vector is zero, no rotation
 if( len < 1e-2 )
 {
 matrix[0][0] = matrix[1][1] = matrix[2][2] = 1.0;
 matrix[0][1] = matrix[1][0] = 0.0;
 matrix[0][2] = matrix[2][0] = 0.0;
 matrix[1][2] = matrix[2][1] = 0.0;
 return;
 }
 vector /= len;
 
 const double cosine = plane_normal % Z;
 const double sine = sqrt( 1 - cosine * cosine );
 
 std::cerr << "Rotation: " << acos( cosine ) << " [" << vector.x << ' ' << vector.y << ' ' << vector.z << ']'
 << std::endl;
 
 const double x = vector.x;
 const double y = vector.y;
 const double z = vector.z;
 const double c = cosine;
 const double s = sine;
 const double o = 1.0 - cosine;
 
 matrix[0][0] = c + x * x * o;
 matrix[0][1] = -z * s + x * y * o;
 matrix[0][2] = y * s + x * z * o;
 
 matrix[1][0] = z * s + x * z * o;
 matrix[1][1] = c + y * y * o;
 matrix[1][2] = -x * s + y * z * o;
 
 matrix[2][0] = -y * s + x * z * o;
 matrix[2][1] = x * s + y * z * o;
 matrix[2][2] = c + z * z * o;
}

References CartVect3D::len(), CartVect3D::x, CartVect3D::y, and CartVect3D::z.

Referenced by main().

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 204 of file surfplot.cpp.

{
 Interface* moab = new Core();
 ErrorCode result;
 std::vector< CartVect3D >::iterator iter;
 FileType type = GNUPLOT;
 
 int idx = 1;
 if( argc == 4 )
 {
 if( !strcmp( argv[idx], "-p" ) )
 type = POSTSCRIPT;
 else if( !strcmp( argv[idx], "-g" ) )
 type = GNUPLOT;
 else if( !strcmp( argv[idx], "-s" ) )
 type = SVG;
 else
 usage_error( argv[0] );
 ++idx;
 }
 
 // scan CL args
 int surface_id;
 if( argc - idx != 2 ) usage_error( argv[0] );
 char* endptr;
 surface_id = strtol( argv[idx], &endptr, 0 );
 if( !endptr || *endptr ) usage_error( argv[0] );
 ++idx;
 
 // Load mesh
 result = moab->load_mesh( argv[idx] );
 if( MB_SUCCESS != result )
 {
 if( MB_FILE_DOES_NOT_EXIST == result )
 std::cerr << argv[idx] << " : open failed.\n";
 else
 std::cerr << argv[idx] << " : error reading file.\n";
 return READ_ERROR;
 }
 
 // Get tag handles
 EntityHandle surface;
 const int dimension = 2; // surface
 if( surface_id )
 {
 Tag tags[2];
 result = moab->tag_get_handle( GEOM_DIMENSION_TAG_NAME, 1, MB_TYPE_INTEGER, tags[0] );
 if( MB_SUCCESS != result )
 {
 std::cerr << "No geometry tag.\n";
 return OTHER_ERROR;
 }
 tags[1] = moab->globalId_tag();
 
 // Find entityset for surface.
 const void* tag_values[] = { &dimension, &surface_id };
 Range surfaces;
 moab->get_entities_by_type_and_tag( 0, MBENTITYSET, tags, tag_values, 2, surfaces );
 if( surfaces.size() != 1 )
 {
 std::cerr << "Found " << surfaces.size() << " surfaces with ID " << surface_id << std::endl;
 return SURFACE_NOT_FOUND;
 }
 surface = *surfaces.begin();
 }
 else
 {
 surface = 0;
 }
 
 // Get surface mesh
 Range elements;
 result = moab->get_entities_by_dimension( surface, dimension, elements );
 if( MB_SUCCESS != result )
 {
 std::cerr << "Internal error\n";
 return OTHER_ERROR;
 }
 
 // Calculate average corner normal in surface mesh
 CartVect3D normal( 0, 0, 0 );
 std::vector< EntityHandle > vertices;
 std::vector< CartVect3D > coords;
 for( Range::iterator i = elements.begin(); i != elements.end(); ++i )
 {
 vertices.clear();
 result = moab->get_connectivity( &*i, 1, vertices, true );
 if( MB_SUCCESS != result )
 {
 std::cerr << "Internal error\n";
 return OTHER_ERROR;
 }
 coords.clear();
 coords.resize( vertices.size() );
 result = moab->get_coords( &vertices[0], vertices.size(), reinterpret_cast< double* >( &coords[0] ) );
 if( MB_SUCCESS != result )
 {
 std::cerr << "Internal error\n";
 return OTHER_ERROR;
 }
 
 for( size_t j = 0; j < coords.size(); ++j )
 {
 CartVect3D v1 = coords[( j + 1 ) % coords.size()] - coords[j];
 CartVect3D v2 = coords[( j + 1 ) % coords.size()] - coords[( j + 2 ) % coords.size()];
 normal += ( v1 * v2 );
 }
 }
 normal /= normal.len();
 
 // Get edges from elements
 Range edge_range;
 result = moab->get_adjacencies( elements, 1, true, edge_range, Interface::UNION );
 if( MB_SUCCESS != result )
 {
 std::cerr << "Internal error\n";
 return OTHER_ERROR;
 }
 
 // Get vertex coordinates for each edge
 std::vector< EntityHandle > edges( edge_range.size() );
 std::copy( edge_range.begin(), edge_range.end(), edges.begin() );
 vertices.clear();
 result = moab->get_connectivity( &edges[0], edges.size(), vertices, true );
 if( MB_SUCCESS != result )
 {
 std::cerr << "Internal error\n";
 return OTHER_ERROR;
 }
 coords.clear();
 coords.resize( vertices.size() );
 result = moab->get_coords( &vertices[0], vertices.size(), reinterpret_cast< double* >( &coords[0] ) );
 if( MB_SUCCESS != result )
 {
 std::cerr << "Internal error\n";
 return OTHER_ERROR;
 }
 
 // Rotate points such that the projection into the view plane
 // can be accomplished by discarding the 'z' coordinate of each
 // point.
 
 std::cerr << "Plane normal: [" << normal.x << ' ' << normal.y << ' ' << normal.z << ']' << std::endl;
 double transform[3][3];
 find_rotation( normal, transform );
 
 for( iter = coords.begin(); iter != coords.end(); ++iter )
 transform_point( *iter, transform );
 
 // Write the file.
 
 switch( type )
 {
 case POSTSCRIPT:
 write_eps( std::cout, coords, surface_id );
 break;
 case SVG:
 write_svg( std::cout, coords );
 break;
 default:
 write_gnuplot( std::cout, coords );
 break;
 }
 return 0;
}

References moab::Range::begin(), moab::Range::end(), ErrorCode, find_rotation(), GEOM_DIMENSION_TAG_NAME, GNUPLOT, CartVect3D::len(), MB_FILE_DOES_NOT_EXIST, MB_SUCCESS, MB_TYPE_INTEGER, MBENTITYSET, OTHER_ERROR, POSTSCRIPT, READ_ERROR, moab::Range::size(), SURFACE_NOT_FOUND, SVG, transform_point(), moab::Interface::UNION, usage_error(), write_eps(), write_gnuplot(), write_svg(), CartVect3D::x, CartVect3D::y, and CartVect3D::z.

operator%()

static double operator% ( const CartVect3D &  a, const CartVect3D &  b  )

static

Definition at line 108 of file surfplot.cpp.

{
 return a.x * b.x + a.y * b.y + a.z * b.z;
}

References CartVect3D::x, CartVect3D::y, and CartVect3D::z.

operator*()

static CartVect3D operator* ( const CartVect3D &  a, const CartVect3D &  b  )

static

Definition at line 113 of file surfplot.cpp.

{
 CartVect3D result;
 result.x = a.y * b.z - a.z * b.y;
 result.y = a.z * b.x - a.x * b.z;
 result.z = a.x * b.y - a.y * b.x;
 return result;
}

References CartVect3D::x, CartVect3D::y, and CartVect3D::z.

operator-()

static CartVect3D operator- ( const CartVect3D &  a, const CartVect3D &  b  )

static

Definition at line 103 of file surfplot.cpp.

{
 return CartVect3D( a.x - b.x, a.y - b.y, a.z - b.z );
}

References CartVect3D::x, CartVect3D::y, and CartVect3D::z.

transform_point()

static void transform_point ( CartVect3D &  point, double  matrix[3][3]  )

static

Definition at line 178 of file surfplot.cpp.

{
 const double x = point.x;
 const double y = point.y;
 const double z = point.z;
 
 point.x = x * matrix[0][0] + y * matrix[0][1] + z * matrix[0][2];
 point.y = x * matrix[1][0] + y * matrix[1][1] + z * matrix[1][2];
 point.z = x * matrix[2][0] + y * matrix[2][1] + z * matrix[2][2];
}

References CartVect3D::x, CartVect3D::y, and CartVect3D::z.

Referenced by main().

usage_error()

static void usage_error ( const char *  name )

static

Definition at line 17 of file surfplot.cpp.

{
 std::cerr << "Usage: " << name << " [-g|-p] <Surface_ID> <input_file>" << std::endl
 << "\t-g - Write GNU Plot data file (default)." << std::endl
 << "\t-p - Write encapsulated postscript file" << std::endl
 << "\t-s - Write an SVG file" << std::endl
 << "\t<Surface_ID> - ID of surface containing mesh to export (0 for entire file)." << std::endl
 << "\t<input_file> - Mesh file to read." << std::endl
 << std::endl
 << " This utility plots the mesh of a single geometric surface "
 << "projected to a plane. The output file is written to stdout." << std::endl;
 
 exit( USAGE_ERROR );
}

References USAGE_ERROR.

Referenced by main().

write_eps()

void write_eps ( std::ostream &  stream, const std::vector< CartVect3D > &  list, int  surface_id  )

static

Definition at line 406 of file surfplot.cpp.

{
 // Coordinate range to use within EPS file
 const int X_MAX = 540; // 540 pts / 72 pts/inch = 7.5 inches
 const int Y_MAX = 720; // 720 pts / 72 pts/inch = 10 inches
 
 std::vector< CartVect3D >::const_iterator iter;
 
 // Get bounding box
 const double D_MAX = std::numeric_limits< double >::max();
 CartVect3D min( D_MAX, D_MAX, 0 );
 CartVect3D max( -D_MAX, -D_MAX, 0 );
 for( iter = coords.begin(); iter != coords.end(); ++iter )
 {
 box_max( max, *iter );
 box_min( min, *iter );
 }
 
 // Calculate translation to page coordinates
 CartVect3D offset = CartVect3D( 0, 0, 0 ) - min;
 CartVect3D scale = max - min;
 scale.x = X_MAX / scale.x;
 scale.y = Y_MAX / scale.y;
 if( scale.x > scale.y ) // keep proportions
 scale.x = scale.y;
 else
 scale.y = scale.x;
 
 // std::cerr << "Min: " << min.x << ' ' << min.y <<
 // " Max: " << max.x << ' ' << max.y << std::endl
 // << "Offset: " << offset.x << ' ' << offset.y <<
 // " Scale: " << scale.x << ' ' << scale.y << std::endl;
 
 // Write header stuff
 s << "%!PS-Adobe-2.0 EPSF-2.0" << std::endl;
 s << "%%Creator: MOAB surfplot" << std::endl;
 s << "%%Title: Surface " << id << std::endl;
 s << "%%DocumentData: Clean7Bit" << std::endl;
 s << "%%Origin: 0 0" << std::endl;
 int max_x = (int)( ( max.x + offset.x ) * scale.x );
 int max_y = (int)( ( max.y + offset.y ) * scale.y );
 s << "%%BoundingBox: 0 0 " << max_x << ' ' << max_y << std::endl;
 s << "%%Pages: 1" << std::endl;
 
 s << "%%BeginProlog" << std::endl;
 s << "save" << std::endl;
 s << "countdictstack" << std::endl;
 s << "mark" << std::endl;
 s << "newpath" << std::endl;
 s << "/showpage {} def" << std::endl;
 s << "/setpagedevice {pop} def" << std::endl;
 s << "%%EndProlog" << std::endl;
 
 s << "%%Page: 1 1" << std::endl;
 s << "1 setlinewidth" << std::endl;
 s << "0.0 setgray" << std::endl;
 
 for( iter = coords.begin(); iter != coords.end(); ++iter )
 {
 double x1 = ( iter->x + offset.x ) * scale.x;
 double y1 = ( iter->y + offset.y ) * scale.y;
 if( ++iter == coords.end() ) break;
 double x2 = ( iter->x + offset.x ) * scale.x;
 double y2 = ( iter->y + offset.y ) * scale.y;
 
 s << "newpath" << std::endl;
 s << x1 << ' ' << y1 << " moveto" << std::endl;
 s << x2 << ' ' << y2 << " lineto" << std::endl;
 s << "stroke" << std::endl;
 }
 
 s << "%%Trailer" << std::endl;
 s << "cleartomark" << std::endl;
 s << "countdictstack" << std::endl;
 s << "exch sub { end } repeat" << std::endl;
 s << "restore" << std::endl;
 s << "%%EOF" << std::endl;
}

References box_max(), box_min(), CartVect3D::x, and CartVect3D::y.

Referenced by main().

write_gnuplot()

void write_gnuplot ( std::ostream &  stream, const std::vector< CartVect3D > &  list  )

static

Definition at line 370 of file surfplot.cpp.

{
 std::vector< CartVect3D >::const_iterator iter;
 
 stream << std::endl;
 for( iter = coords.begin(); iter != coords.end(); ++iter )
 {
 stream << iter->x << ' ' << iter->y << std::endl;
 ++iter;
 if( iter == coords.end() )
 {
 stream << std::endl;
 break;
 }
 stream << iter->x << ' ' << iter->y << std::endl;
 stream << std::endl;
 }
 std::cerr << "Display with gnuplot command \"plot with lines\"\n";
}

Referenced by main().

write_svg()

void write_svg ( std::ostream &  stream, const std::vector< CartVect3D > &  list  )

static

Definition at line 485 of file surfplot.cpp.

{
 
 std::vector< CartVect3D >::const_iterator iter;
 
 // Get bounding box
 const double D_MAX = std::numeric_limits< double >::max();
 CartVect3D min( D_MAX, D_MAX, 0 );
 CartVect3D max( -D_MAX, -D_MAX, 0 );
 for( iter = coords.begin(); iter != coords.end(); ++iter )
 {
 box_max( max, *iter );
 box_min( min, *iter );
 }
 CartVect3D size = max - min;
 
 // scale to 640 pixels on a side
 double scale = 640.0 / ( size.x > size.y ? size.x : size.y );
 size *= scale;
 
 file << "<?xml version=\"1.0\" standalone=\"no\"?>" << std::endl;
 file << "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" "
 << "\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">" << std::endl;
 file << std::endl;
 file << "<svg width=\"" << (int)size.x << "\" height=\"" << (int)size.y
 << "\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">" << std::endl;
 
 int left = (int)( min.x * scale );
 int top = (int)( min.y * scale );
 iter = coords.begin();
 while( iter != coords.end() )
 {
 file << "<line "
 << "x1=\"" << (int)( scale * iter->x ) - left << "\" "
 << "y1=\"" << (int)( scale * iter->y ) - top << "\" ";
 ++iter;
 file << "x2=\"" << (int)( scale * iter->x ) - left << "\" "
 << "y2=\"" << (int)( scale * iter->y ) - top << "\" "
 << " style=\"stroke:rgb(99,99,99);stroke-width:2\""
 << "/>" << std::endl;
 ++iter;
 }
 
 // Write footer
 file << "</svg>" << std::endl;
}

References box_max(), box_min(), size, CartVect3D::x, and CartVect3D::y.

Referenced by main().