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/**
*
* This file is part of Tulip (https://tulip.labri.fr)
*
* Authors: David Auber and the Tulip development Team
* from LaBRI, University of Bordeaux
*
* Tulip 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 3
* of the License, or (at your option) any later version.
*
* Tulip 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.
*
*/
#include <ogdf/energybased/PivotMDS.h>
#include <ogdf/packing/ComponentSplitterLayout.h>
#include <tulip2ogdf/OGDFLayoutPluginBase.h>
using namespace tlp;
using namespace ogdf;
static const char *paramHelp[] = {
// number of pivots
"Sets the number of pivots. If the new value is less than or equal to 0 the default value (250) is used.",
// use edge costs
"Sets if the edge costs attribute has to be used.",
// edge costs
"Sets the desired distance between adjacent nodes. If the new value is less than or equal to 0 the default value (100) is used.",
// 3D layout
"If true, the layout is computed in 3D, else it is computed in 2D."};
class OGDFPivotMDS : public OGDFLayoutPluginBase {
public:
PLUGININFORMATION("Pivot MDS (OGDF)", "Mark Ortmann", "29/05/2015",
"The Pivot MDS (multi-dimensional scaling) layout algorithm. By setting the "
"number of pivots to infinity this algorithm behaves just like "
"classical MDS. See:<br/><b>Eigensolver methods for progressive "
"multidimensional scaling of large data.</b> Brandes and Pich",
"1.0", "Force Directed")
OGDFPivotMDS(const tlp::PluginContext *context)
: OGDFLayoutPluginBase(context, context ? new ogdf::ComponentSplitterLayout() : nullptr) {
addInParameter<int>("number of pivots", paramHelp[0], "250", false);
addInParameter<bool>("use edge costs", paramHelp[1], "false", false);
addInParameter<double>("edge costs", paramHelp[2], "100", false);
addInParameter<bool>("3D layout", paramHelp[3], "false");
}
~OGDFPivotMDS() override {}
void beforeCall() override {
ComponentSplitterLayout *csl = static_cast<ogdf::ComponentSplitterLayout *>(ogdfLayoutAlgo);
PivotMDS *pivotMds(new ogdf::PivotMDS());
csl->setLayoutModule(pivotMds);
if (dataSet != nullptr) {
bool bval = false;
int ival = 0;
double val = 0;
if (dataSet->get("number of pivots", ival))
pivotMds->setNumberOfPivots(ival);
if (dataSet->get("edge costs", val))
pivotMds->setEdgeCosts(ival);
if (dataSet->get("use edge costs", bval))
pivotMds->useEdgeCostsAttribute(bval);
}
}
void afterCall() {
bool bval = false;
dataSet->get("3D layout", bval);
if (!bval) {
const std::vector<tlp::node> &nodes = graph->nodes();
size_t nbElts = nodes.size();
for (unsigned int i = 0; i < nbElts; ++i) {
tlp::Coord nodeCoord = result->getNodeValue(nodes[i]);
nodeCoord[2] = 0.0;
result->setNodeValue(nodes[i], nodeCoord);
}
}
}
};
PLUGIN(OGDFPivotMDS)
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