/* This file is part of Eternity II Editor.
*
* Eternity II Editor 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 3 of the License, or
* (at your option) any later version.
*
* Eternity II Editor 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 Eternity II Editor. If not, see <http://www.gnu.org/licenses/>.
*
* Eternity II Editor project is hosted on SourceForge:
* http://sourceforge.net/projects/eternityii/
* and maintained by Yannick Kirschhoffer <alcibiade@alcibiade.org>
*/
package org.alcibiade.eternity.editor.solver.path;
import org.alcibiade.eternity.editor.model.GridModel;
import org.alcibiade.eternity.editor.model.QuadModel;
import org.alcibiade.eternity.editor.solver.collection.LightestSelector;
import org.alcibiade.eternity.editor.solver.collection.Selector;
public class HumanPathMkI implements PathProvider {
@Override
public int getNextPathIndex(GridModel pieces, GridModel grid) {
int gsize = grid.getSize();
int positions = gsize * gsize;
Selector<Integer> possibleIndices = new LightestSelector<Integer>();
for (int i = 0; i < positions; i++) {
QuadModel quad = grid.getQuad(i);
if (quad.isClear()) {
QuadModel missingQuad = grid.getMissingQuad(i);
if (missingQuad.countPattern(null) < 4) {
int weight = getMatchingQuads(pieces, missingQuad);
possibleIndices.put(i, weight);
}
}
}
int result = possibleIndices.getSelected();
return result;
}
protected static int getMatchingQuads(GridModel pieces, QuadModel missingQuad) {
int result = 0;
if (missingQuad.isNull()) {
for (QuadModel quad : pieces) {
if (quad.countDefaultPattern() == 0) {
result += 1;
}
}
} else {
for (QuadModel quad : pieces) {
if (quad.countDefaultPattern() == missingQuad.countDefaultPattern()
&& quad.equalsIgnoreRotation(missingQuad)) {
result += 1;
}
}
}
return result;
}
}