156 lines
4.5 KiB
C
156 lines
4.5 KiB
C
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/*
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This file is part of SECONDO.
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Copyright (C) 2011, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef GIS_CONTOUR_H
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#define GIS_CONTOUR_H
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// uncomment the next line if you want to use a
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// fixed size cahce of 64 MB for contour operator
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// instead of using the available memory size requested
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// from query processor
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// #define contourlines_fixed_cache
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/*
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SECONDO includes
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*/
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#include <NList.h>
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/*
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Raster2 and Tile includes
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*/
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#include "../Raster2/stype.h"
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#include "../Tile/t/tint.h"
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#include "../Tile/t/treal.h"
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/*
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declaration of namespace GISAlgebra
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*/
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namespace GISAlgebra
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{
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/*
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declaration of contourFuns array
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*/
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extern ValueMapping contourFuns[];
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/*
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Type Mapping
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*/
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ListExpr contourTypeMap(ListExpr args);
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/*
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Value Mapping
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*/
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int contourSelectFun(ListExpr args);
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/*
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Method Intersects calculates if a line between two points intersects the level
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Parameters: values and coordinates of two points, value of a third point,
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the level value, a pointer for a counter to store the number
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of intersect and two pointer two store the point where the line is
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intersected
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*/
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void Intersect(double, double, double,
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double, double, double,
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double, double, int*, double*, double*);
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/*
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Method GetValuesContour reads the values for 3x3 cells
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parameters: a - reference to top left cell \\
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a1 - reference to top left cell + 1 \\
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b - reference to top middle cell \\
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b1 - reference to top middle cell + 1 \\
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c - reference to top right cell \\
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d - reference to middle left cell \\
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f - reference to middle right cell \\
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g - reference to bottom left cell \\
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h - reference to bottom right cell \\
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row - number of current row \\
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column - number of current column \\
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currentTuple - number of current tuple \\
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s\_in - current tuple \\
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maxX - maximum X in a tuple \\
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maxY - maximum Y in a tuple \\
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factorNext - if vector current and next have different start points \\
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factorlast - if vector current and last have different start points \\
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skipNextRow - if difference between next and current is more
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than one tile \\
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skipLastRow - if difference between last and current is more
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than one tile \\
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current - current vector \\
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next - next vector \\
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last - last vector \\
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currentSize - size of current vector \\
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nextSize - size of next vector \\
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lastSize - size of last vector \\
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return value: -
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exceptions: -
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*/
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template <typename T, typename SourceTypeProperties>
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void GetValuesContour(double* a, double* a1, double* b, double* b1,
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double* c, double* d, double* f, double* g, double* h,
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int row, int column, int currentTuple, T* s_in,
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int maxX, int maxY,
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int factorNext, int factorLast,
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bool skipNextRow, bool skipLastRow,
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std::vector<Tuple*> current, std::vector<Tuple*> next,
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std::vector<Tuple*> last,
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int currentSize, int nextSize, int lastSize);
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/*
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Struct contourInfo describes name, syntax, meaning and signature
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of operator contour.
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*/
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struct contourInfo : OperatorInfo
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{
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contourInfo()
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{
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name = "contourlines";
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signature = "sType x integer -> stream(lines)";
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appendSignature("stream(tType) x integer -> stream(lines)");
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syntax = "_ contourlines[_]";
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meaning = "Creates contour lines for raster or stream of tiles";
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}
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};
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}
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#endif /* #define GIS_CONTOUR_H */
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