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authorMarc Jeanmougin <marc.jeanmougin@telecom-paristech.fr>2018-04-29 14:25:32 +0000
committerMarc Jeanmougin <marc.jeanmougin@telecom-paristech.fr>2018-04-29 14:25:32 +0000
commitab5f8ff5869021958f4ae8b838c3d707a2e85eaa (patch)
tree4907675828a5401d013b7587538cc8541edd2764 /src/libcola/tests/topology.cpp
parentmoved libcroco, libuemf, libdepixelize to 3rdparty folder (diff)
downloadinkscape-ab5f8ff5869021958f4ae8b838c3d707a2e85eaa.tar.gz
inkscape-ab5f8ff5869021958f4ae8b838c3d707a2e85eaa.zip
Put adaptagrams into its own folder
Diffstat (limited to 'src/libcola/tests/topology.cpp')
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diff --git a/src/libcola/tests/topology.cpp b/src/libcola/tests/topology.cpp
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--- a/src/libcola/tests/topology.cpp
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-/*
- * vim: ts=4 sw=4 et tw=0 wm=0
- *
- * libcola - A library providing force-directed network layout using the
- * stress-majorization method subject to separation constraints.
- *
- * Copyright (C) 2006-2008 Monash University
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file LICENSE; if not,
- * write to the Free Software Foundation, Inc., 59 Temple Place,
- * Suite 330, Boston, MA 02111-1307 USA
- *
-*/
-
-/** \file topology.cpp
- *
- * tests topology preserving layout. graph is a triangle.
- * We have a fourth disconnected node starting inside the triangle.
- * We give the disconnected node a desired position outside the triangle
- * and begin layout. Layout should converge to near zero stress as all
- * edges should be able to reach their desired lengths, and disconnected
- * node should still be inside the triangle at the end.
- *
- *
- * Authors:
- * Tim Dwyer <tgdwyer@gmail.com>
- */
-#include <iostream>
-#include <iomanip>
-#include <fstream>
-
-#include <vector>
-#include <valarray>
-#include <algorithm>
-#include <float.h>
-#include <libcola/cola.h>
-#include <libtopology/topology_graph.h>
-#include "graphlayouttest.h"
-using namespace std;
-using namespace cola;
-
-topology::Node* addNode(
- topology::Nodes& vs, vpsc::Rectangle* r) {
- topology::Node *v = new topology::Node(vs.size(), r);
- vs.push_back(v);
- return v;
-}
-void addToPath(topology::EdgePoints& ps, topology::Node *v, topology::EdgePoint::RectIntersect i) {
- ps.push_back(new topology::EdgePoint(v,i));
-}
-struct SetDesiredPos : public PreIteration {
- SetDesiredPos(Locks& locks) : PreIteration(locks) {}
- bool operator()() {
- return true;
- }
-};
-void writeFile(const topology::Nodes& vs, const topology::Edges& es, const char *outputFileName) {
- const unsigned n=vs.size();
- vector<cola::Edge> cedges;
-
- for(unsigned i=0;i<es.size();i++) {
- cedges.push_back(make_pair(1,2));
- }
-
- vector<straightener::Route*> routes;
- for(topology::Edges::const_iterator e=es.begin();e!=es.end();++e) {
- routes.push_back((*e)->getRoute());
- }
-
- vector<string> labels(n);
- for(unsigned i=0;i<n;++i) {
- stringstream ss;
- ss << i;
- labels[i]=ss.str();
- }
-
- vector<vpsc::Rectangle*> rs;
- for(topology::Nodes::const_iterator i=vs.begin();i!=vs.end();++i) {
- rs.push_back((*i)->rect);
- }
- OutputFile of(rs,cedges,NULL,outputFileName,true,false);
- of.setLabels(labels);
- of.routes=&routes;
- of.generate();
-
- for_each(routes.begin(),routes.end(),delete_object());
-}
-struct Test : TestConvergence {
- Test(const double d,const unsigned i,topology::Nodes& vs, topology::Edges& es) : TestConvergence(d,i), vs(vs), es(es) {}
- bool operator()(const double new_stress, valarray<double> & X, valarray<double> & Y) {
- cout << "stress="<<new_stress<<" iteration="<<iterations<<endl;
- stringstream ss;
- ss << "topology-" << setfill('0') << setw(3) << ++iterations << ".svg";
- writeFile(vs,es,ss.str().c_str());
- if(iterations<100) {
- return false;
- }
- return true;
- return TestConvergence::operator()(new_stress,X,Y);
- }
- double lastStress;
- topology::Nodes& vs;
- topology::Edges& es;
-};
-void randomMove(int i) {
- printf("We have a triangle of three connected nodes and a fourth disconnected node. We set the fourth node's desired position at a point some random direction outside the triangle.\n");
- printf("Using srand=%d\n",i);
- srand(i);
- const unsigned V = 4;
- Edge edge_array[] = { Edge(0, 1), Edge(1, 2), Edge(2, 0) };
- const std::size_t E = sizeof(edge_array) / sizeof(Edge);
- vector<Edge> es(edge_array,edge_array+E);
- vector<vpsc::Rectangle*> rs;
- double x[]={200,250,300,250},y[]={200,250,200,225},size=10;
- for(unsigned i=0;i<V;++i) {
- rs.push_back(new vpsc::Rectangle(x[i],x[i]+size,y[i],y[i]+size));
- }
- double idealLength=60;
- // set up topology graph
- topology::Nodes vs;
- for(vector<Rectangle*>::iterator i = rs.begin(); i!=rs.end();++i) {
- addNode(vs,*i);
- }
- topology::Edges tes;
- unsigned eID=0;
- for(vector<Edge>::iterator e=es.begin();e!=es.end();++e, ++eID) {
- topology::EdgePoints ps;
- addToPath(ps,vs[e->first],topology::EdgePoint::CENTRE);
- addToPath(ps,vs[e->second],topology::EdgePoint::CENTRE);
- tes.push_back(new topology::Edge(eID, idealLength, ps));
- }
- writeFile(vs,tes,"topology-000.svg");
- Locks locks;
- // we move the 4th node somewhere outside the triangle. The triangle should be
- // dragged along!
- const double PI = 2.0*acos(0.0);
- double angle = getRand(2.0*PI);
- double dx=150*cos(angle), dy=150*sin(angle);
-
- double lx=rs[3]->getCentreX()+dx,
- ly=rs[3]->getCentreY()+dy;
- //double lx=353.886210, ly=342.789705;
- locks.push_back(Lock(3,lx,ly));
- printf(" Lock: %f,%f\n",lx,ly);
- SetDesiredPos preIteration(locks);
- Test test(0.00001,100,vs,tes);
- ConstrainedFDLayout alg(rs,es,idealLength,NULL,test,&preIteration);
-
- alg.setTopology(&vs,&tes);
- alg.run(true,true);
- double finalStress=alg.computeStress();
- printf("finalStress=%f\n",finalStress);
-
- //assert(finalStress<1e-5);
- for_each(rs.begin(),rs.end(),delete_object());
- for_each(tes.begin(),tes.end(),delete_object());
- for_each(vs.begin(),vs.end(),delete_object());
-}
-int main() {
- unsigned i=0;
- for(;i<1;i++) {
- randomMove(i);
- }
- return 0;
-}
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4:textwidth=80 :