mirror of
https://git.osgeo.org/gitea/postgis/postgis
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161 lines
4.6 KiB
C
161 lines
4.6 KiB
C
/**********************************************************************
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* $Id: liblwgeom_internal.h 4497 2009-09-14 18:33:54Z pramsey $
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*
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* PostGIS - Spatial Types for PostgreSQL
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* http://postgis.refractions.net
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* Copyright 2001-2006 Refractions Research Inc.
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* Copyright 2007-2008 Mark Cave-Ayland
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* Copyright 2008 Paul Ramsey <pramsey@cleverelephant.ca>
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU General Public Licence. See the COPYING file.
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*
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**********************************************************************/
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#include <assert.h>
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#include "liblwgeom.h"
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#include <string.h>
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#include <math.h>
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#include <inttypes.h>
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#if HAVE_IEEEFP_H
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#include <ieeefp.h>
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#endif
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/**
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* PI
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*/
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#define PI 3.1415926535897932384626433832795
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/**
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* Well-Known Text (WKT) Output Variant Types
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*/
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#define WKT_NO_TYPE 0x08 /* Internal use only */
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#define WKT_NO_PARENS 0x10 /* Internal use only */
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#define WKT_IS_CHILD 0x20 /* Internal use only */
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/**
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* Well-Known Binary (WKB) Output Variant Types
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*/
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#define WKB_DOUBLE_SIZE 8 /* Internal use only */
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#define WKB_INT_SIZE 4 /* Internal use only */
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#define WKB_BYTE_SIZE 1 /* Internal use only */
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/**
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* Well-Known Binary (WKB) Geometry Types
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*/
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#define WKB_POINT_TYPE 1
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#define WKB_LINESTRING_TYPE 2
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#define WKB_POLYGON_TYPE 3
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#define WKB_MULTIPOINT_TYPE 4
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#define WKB_MULTILINESTRING_TYPE 5
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#define WKB_MULTIPOLYGON_TYPE 6
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#define WKB_GEOMETRYCOLLECTION_TYPE 7
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#define WKB_CIRCULARSTRING_TYPE 8
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#define WKB_COMPOUNDCURVE_TYPE 9
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#define WKB_CURVEPOLYGON_TYPE 10
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#define WKB_MULTICURVE_TYPE 11
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#define WKB_MULTISURFACE_TYPE 12
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#define WKB_CURVE_TYPE 13 /* from ISO draft, not sure is real */
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#define WKB_SURFACE_TYPE 14 /* from ISO draft, not sure is real */
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#define WKB_POLYHEDRALSURFACE_TYPE 15
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#define WKB_TIN_TYPE 16
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#define WKB_TRIANGLE_TYPE 17
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/**
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* Macro for reading the size from the GSERIALIZED size attribute.
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* Cribbed from PgSQL, top 30 bits are size. Use VARSIZE() when working
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* internally with PgSQL.
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*/
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#define SIZE_GET(varsize) (((varsize) >> 2) & 0x3FFFFFFF)
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#define SIZE_SET(varsize, size) (((varsize) & 0x00000003)|(((size) & 0x3FFFFFFF) << 2 ))
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/*
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* Internal prototypes
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*/
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/*
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* Force dims
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*/
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LWGEOM* lwgeom_force_dims(const LWGEOM *lwgeom, int hasz, int hasm);
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LWPOINT* lwpoint_force_dims(const LWPOINT *lwpoint, int hasz, int hasm);
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LWLINE* lwline_force_dims(const LWLINE *lwline, int hasz, int hasm);
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LWPOLY* lwpoly_force_dims(const LWPOLY *lwpoly, int hasz, int hasm);
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LWCOLLECTION* lwcollection_force_dims(const LWCOLLECTION *lwcol, int hasz, int hasm);
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POINTARRAY* ptarray_force_dims(const POINTARRAY *pa, int hasz, int hasm);
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/*
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* Is Empty?
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*/
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int lwpoly_is_empty(const LWPOLY *poly);
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int lwcollection_is_empty(const LWCOLLECTION *col);
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int lwcircstring_is_empty(const LWCIRCSTRING *circ);
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int lwtriangle_is_empty(const LWTRIANGLE *triangle);
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int lwline_is_empty(const LWLINE *line);
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int lwpoint_is_empty(const LWPOINT *point);
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/*
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* Number of vertices?
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*/
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int lwline_count_vertices(LWLINE *line);
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int lwpoly_count_vertices(LWPOLY *poly);
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int lwcollection_count_vertices(LWCOLLECTION *col);
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/*
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* DP simplification
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*/
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POINTARRAY* ptarray_simplify(POINTARRAY *inpts, double epsilon);
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LWLINE* lwline_simplify(const LWLINE *iline, double dist);
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LWPOLY* lwpoly_simplify(const LWPOLY *ipoly, double dist);
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LWCOLLECTION* lwcollection_simplify(const LWCOLLECTION *igeom, double dist);
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/*
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* Point comparisons
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*/
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int p4d_same(POINT4D p1, POINT4D p2);
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/*
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* Area calculations
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*/
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double lwpoly_area(const LWPOLY *poly);
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double lwcurvepoly_area(const LWCURVEPOLY *curvepoly);
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double lwtriangle_area(const LWTRIANGLE *triangle);
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/*
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* Length calculations
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*/
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double lwcompound_length(const LWCOMPOUND *comp);
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double lwcompound_length_2d(const LWCOMPOUND *comp);
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double lwline_length(const LWLINE *line);
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double lwline_length_2d(const LWLINE *line);
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double lwcircstring_length(const LWCIRCSTRING *circ);
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double lwcircstring_length_2d(const LWCIRCSTRING *circ);
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double lwpoly_perimeter(const LWPOLY *poly);
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double lwpoly_perimeter_2d(const LWPOLY *poly);
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double lwcurvepoly_perimeter(const LWCURVEPOLY *poly);
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double lwcurvepoly_perimeter_2d(const LWCURVEPOLY *poly);
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double lwtriangle_perimeter(const LWTRIANGLE *triangle);
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double lwtriangle_perimeter_2d(const LWTRIANGLE *triangle);
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/*
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* Segmentization
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*/
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LWLINE *lwcircstring_segmentize(const LWCIRCSTRING *icurve, uint32 perQuad);
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LWLINE *lwcompound_segmentize(const LWCOMPOUND *icompound, uint32 perQuad);
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LWPOLY *lwcurvepoly_segmentize(const LWCURVEPOLY *curvepoly, uint32 perQuad);
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/*
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* Affine
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*/
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void ptarray_affine(POINTARRAY *pa, const AFFINE *affine);
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/*
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* PointArray
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*/
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char ptarray_isccw(const POINTARRAY *pa);
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