krita

kis_perspective_grid.h

00001 /*
00002  * This file is part of Krita
00003  *
00004  *  Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00019  */
00020 
00021 #ifndef KIS_PERSPECTIVE_GRID_H
00022 #define KIS_PERSPECTIVE_GRID_H
00023 
00024 #include <qvaluelist.h>
00025 
00026 #include <kis_perspective_math.h>
00027 #include <kis_point.h>
00028 #include <ksharedptr.h>
00029 
00030 class KisPerspectiveGridNode : public KisPoint, public KShared {
00031     public:
00032         inline KisPerspectiveGridNode(double x, double y) : KisPoint(x,y)  { }
00033         inline KisPerspectiveGridNode(KisPoint p) : KisPoint(p)  { }
00034 };
00035 typedef KSharedPtr<KisPerspectiveGridNode> KisPerspectiveGridNodeSP;
00036 
00037 class KisSubPerspectiveGrid {
00038     public:
00039         KisSubPerspectiveGrid(KisPerspectiveGridNodeSP topLeft, KisPerspectiveGridNodeSP topRight, KisPerspectiveGridNodeSP bottomRight, KisPerspectiveGridNodeSP bottomLeft);
00040         
00041         inline KisPoint topBottomVanishingPoint() { return computeVanishingPoint( topLeft(), topRight(), bottomLeft(), bottomRight() ); };
00042         inline KisPoint leftRightVanishingPoint() { return computeVanishingPoint( topLeft(), bottomLeft(), topRight(), bottomRight() ); };
00043         
00044         inline KisSubPerspectiveGrid* leftGrid() { return m_leftGrid; }
00045         inline void setLeftGrid(KisSubPerspectiveGrid* g) { Q_ASSERT(m_leftGrid==0); m_leftGrid = g; }
00046         inline KisSubPerspectiveGrid* rightGrid() { return m_rightGrid; }
00047         inline void setRightGrid(KisSubPerspectiveGrid* g) { Q_ASSERT(m_rightGrid==0); m_rightGrid = g; }
00048         inline KisSubPerspectiveGrid* topGrid() { return m_topGrid; }
00049         inline void setTopGrid(KisSubPerspectiveGrid* g) { Q_ASSERT(m_topGrid==0); m_topGrid = g; }
00050         inline KisSubPerspectiveGrid* bottomGrid() { return m_bottomGrid; }
00051         inline void setBottomGrid(KisSubPerspectiveGrid* g) { Q_ASSERT(m_bottomGrid==0); m_bottomGrid = g; }
00052         inline const KisPerspectiveGridNodeSP topLeft() const { return m_topLeft; }
00053         inline KisPerspectiveGridNodeSP topLeft() { return m_topLeft; }
00054         inline const KisPerspectiveGridNodeSP topRight() const { return m_topRight; }
00055         inline KisPerspectiveGridNodeSP topRight() { return m_topRight; }
00056         inline const KisPerspectiveGridNodeSP bottomLeft() const { return m_bottomLeft; }
00057         inline KisPerspectiveGridNodeSP bottomLeft() { return m_bottomLeft; }
00058         inline const KisPerspectiveGridNodeSP bottomRight() const { return m_bottomRight; }
00059         inline KisPerspectiveGridNodeSP bottomRight() { return m_bottomRight; }
00060         inline int subdivisions() const { return m_subdivisions; }
00065         inline int index() const { return m_index; }
00066 
00070         bool contains(const KisPoint p) const;
00071     private:
00072         inline KisPoint computeVanishingPoint(KisPerspectiveGridNodeSP p11, KisPerspectiveGridNodeSP p12, KisPerspectiveGridNodeSP p21, KisPerspectiveGridNodeSP p22)
00073         {
00074             KisPerspectiveMath::LineEquation d1 = KisPerspectiveMath::computeLineEquation( p11, p12 );
00075             KisPerspectiveMath::LineEquation d2 = KisPerspectiveMath::computeLineEquation( p21, p22 );
00076             return KisPerspectiveMath::computeIntersection(d1,d2);
00077         }
00078     private:
00079         KisPerspectiveGridNodeSP m_topLeft, m_topRight, m_bottomLeft, m_bottomRight;
00080         KisSubPerspectiveGrid *m_leftGrid, *m_rightGrid, *m_topGrid, *m_bottomGrid;
00081         int m_subdivisions;
00082         int m_index;
00083         static int s_lastIndex;
00084 };
00085 
00086 class KisPerspectiveGrid {
00087     public:
00088         KisPerspectiveGrid();
00089         ~KisPerspectiveGrid();
00093         bool addNewSubGrid( KisSubPerspectiveGrid* ng );
00094         inline QValueList<KisSubPerspectiveGrid*>::const_iterator begin() const { return m_subGrids.begin(); }
00095         inline QValueList<KisSubPerspectiveGrid*>::const_iterator end() const { return m_subGrids.end(); }
00096         inline bool hasSubGrids() const { return !m_subGrids.isEmpty(); }
00097         void clearSubGrids();
00098         inline int countSubGrids() const { return m_subGrids.size(); }
00102         KisSubPerspectiveGrid* gridAt(KisPoint p);
00103     private:
00104         QValueList<KisSubPerspectiveGrid*> m_subGrids;
00105 };
00106 
00107 #endif
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