Mercurial > fife-parpg

annotate engine/core/model/metamodel/grids/cellgrid.cpp @ 621:356634098bd9

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* Removed the image chunking size variable from engine settings. * Replaced the existing define of PI and added some math related static const variables
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Fri, 01 Oct 2010 14:09:47 +0000
parents 90005975cdbb
children
rev   line source
0
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
46
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
0
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
0
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 // Standard C++ library includes
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23 #include <cassert>
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24
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25 // 3rd party library includes
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26
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27 // FIFE includes
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28 // These includes are split up in two parts, separated by one empty line
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29 // First block: files included from the FIFE root src directory
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30 // Second block: files included from the same folder
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31 #include "util/log/logger.h"
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32
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33 #include "cellgrid.h"
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34
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35 namespace FIFE {
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36 static Logger _log(LM_CELLGRID);
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37
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38 CellGrid::CellGrid(bool allow_diagonals):
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39 FifeClass(),
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40 m_matrix(),
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41 m_inverse_matrix(),
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42 m_xshift(0),
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43 m_yshift(0),
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44 m_xscale(1),
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45 m_yscale(1),
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46 m_rotation(0),
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47 m_allow_diagonals(allow_diagonals) {
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48 updateMatrices();
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49 }
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50
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51 CellGrid::~CellGrid() {
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52 }
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53
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54 void CellGrid::getAccessibleCoordinates(const ModelCoordinate& curpos, std::vector<ModelCoordinate>& coordinates) {
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55 coordinates.clear();
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56 for (int x = curpos.x - 1; x <= curpos.x + 1; x++) {
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57 for (int y = curpos.y - 1; y <= curpos.y + 1; y++) {
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58 ModelCoordinate pt;
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59 pt.x = x;
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60 pt.y = y;
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61 if (isAccessible(curpos, pt)) {
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62 coordinates.push_back(pt);
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63 }
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64 }
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65 }
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66 }
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67
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68 void CellGrid::updateMatrices() {
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69 m_matrix.loadRotate(m_rotation, 0.0, 0.0, 1.0);
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70 m_matrix.applyScale(m_xscale,m_yscale, 1);
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71 m_matrix.applyTranslate(m_xshift, m_yshift, 0);
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72 m_inverse_matrix = m_matrix.inverse();
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73 }
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74
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75 ExactModelCoordinate CellGrid::toMapCoordinates(const ModelCoordinate& layer_coords) {
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76 return toMapCoordinates(intPt2doublePt(layer_coords));
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77 }
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78
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79 int CellGrid::orientation(const ExactModelCoordinate& pt, const ExactModelCoordinate& pt1, const ExactModelCoordinate& pt2) {
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80 double o = (pt2.x - pt1.x) * (pt.y - pt1.y) - (pt.x - pt1.x) * (pt2.y - pt1.y);
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81 if (o > 0.0) {
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82 return 1;
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83 } else if (o < 0.0) {
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84 return -1;
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85 }
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86 return 0;
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87 }
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88
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89 bool CellGrid::ptInTriangle(const ExactModelCoordinate& pt, const ExactModelCoordinate& pt1, const ExactModelCoordinate& pt2, const ExactModelCoordinate& pt3) {
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90 double o1 = orientation(pt1, pt2, pt);
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91 double o2 = orientation(pt2, pt3, pt);
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92 double o3 = orientation(pt3, pt1, pt);
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93 bool result = (o1 == o2) && (o2 == o3);
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94 FL_DBG(_log, LMsg("ptInTriangle, pt=") << pt << " pt1=" << pt1 << " pt2=" << pt2 << " pt3=" << pt3 << " in=" << result);
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95 return result;
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96 }
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97 }