PostGIS  2.1.10dev-r@@SVN_REVISION@@
POINTARRAY* ptarray_force_dims ( const POINTARRAY pa,
int  hasz,
int  hasm 
)

Definition at line 999 of file ptarray.c.

References POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, getPoint4d_p(), LW_TRUE, POINT4D::m, POINTARRAY::npoints, ptarray_append_point(), ptarray_construct_empty(), and POINT4D::z.

Referenced by lwline_force_dims(), lwpoint_force_dims(), and lwpoly_force_dims().

1000 {
1001  /* TODO handle zero-length point arrays */
1002  int i;
1003  int in_hasz = FLAGS_GET_Z(pa->flags);
1004  int in_hasm = FLAGS_GET_M(pa->flags);
1005  POINT4D pt;
1006  POINTARRAY *pa_out = ptarray_construct_empty(hasz, hasm, pa->npoints);
1007 
1008  for( i = 0; i < pa->npoints; i++ )
1009  {
1010  getPoint4d_p(pa, i, &pt);
1011  if( hasz && ! in_hasz )
1012  pt.z = 0.0;
1013  if( hasm && ! in_hasm )
1014  pt.m = 0.0;
1015  ptarray_append_point(pa_out, &pt, LW_TRUE);
1016  }
1017 
1018  return pa_out;
1019 }
double m
Definition: liblwgeom.h:308
int npoints
Definition: liblwgeom.h:327
int ptarray_append_point(POINTARRAY *pa, const POINT4D *pt, int repeated_points)
Append a point to the end of an existing POINTARRAY If allow_duplicate is LW_TRUE, then a duplicate point will not be added.
Definition: ptarray.c:141
uint8_t flags
Definition: liblwgeom.h:325
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:51
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:106
double z
Definition: liblwgeom.h:308
POINTARRAY * ptarray_construct_empty(char hasz, char hasm, uint32_t maxpoints)
Create a new POINTARRAY with no points.
Definition: ptarray.c:57
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:107
int getPoint4d_p(const POINTARRAY *pa, int n, POINT4D *point)
Definition: lwgeom_api.c:217

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