C++ PG_GETARG_SPOLY函数代码示例

本文整理汇总了C++中PG_GETARG_SPOLY函数的典型用法代码示例。如果您正苦于以下问题：C++ PG_GETARG_SPOLY函数的具体用法？C++ PG_GETARG_SPOLY怎么用？C++ PG_GETARG_SPOLY使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了PG_GETARG_SPOLY函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: spherepoly_add_points_finalize

  Datum  spherepoly_add_points_finalize(PG_FUNCTION_ARGS)
  {
    SPOLY   * poly  =  ( SPOLY   * ) PG_GETARG_POINTER ( 0 ) ;
    if ( poly == NULL ){
      PG_RETURN_NULL ( );
    }

    poly = PG_GETARG_SPOLY( 0 );

    if ( poly->npts < 3 ){
      elog ( NOTICE , "spoly(spoint): At least 3 points required" );
      FREE ( poly );
      PG_RETURN_NULL ( );
    }
    // Skip if distance is equal 180deg
    if ( FPeq ( spoint_dist ( &poly->p[0], &poly->p[ poly->npts - 1 ]) , PI ) )
    {
      elog ( NOTICE , "spoly(spoint): Cannot close polygon. Distance between first and last point is 180deg" );
      FREE ( poly );
      PG_RETURN_NULL ( );
    }

    if ( !spherepoly_check ( poly ) ){
      elog ( NOTICE , "spoly(spoint): a line segment overlaps or polygon too large" );
      FREE ( poly ) ;
      PG_RETURN_NULL();
    }
    PG_RETURN_POINTER ( poly );
  }

开发者ID:mnullmei，项目名称:pgsphere，代码行数:29，代码来源:polygon.c

示例2: spheretrans_poly

 Datum  spheretrans_poly(PG_FUNCTION_ARGS)
 {
   SPOLY   * sp  =  PG_GETARG_SPOLY ( 0 ) ;
   SEuler  * se  =  ( SEuler  * ) PG_GETARG_POINTER ( 1 ) ;
   SPOLY   * out =  ( SPOLY   * ) MALLOC ( VARSIZE(sp) );
   PG_RETURN_POINTER ( euler_spoly_trans ( out , sp, se ) );
 }

开发者ID:mnullmei，项目名称:pgsphere，代码行数:7，代码来源:polygon.c

示例3: spherepoly_circ

  Datum  spherepoly_circ(PG_FUNCTION_ARGS)
  {
    SPOLY * poly = PG_GETARG_SPOLY( 0 ) ;
    int32 i;
    SLine l;
    float8   sum = 0.0;

    for ( i=0; i<poly->npts; i++ ){
       sum += ( spoly_segment ( &l , poly , i ) )->length ;
    }
    PG_RETURN_FLOAT8 ( sum );
  }

开发者ID:mnullmei，项目名称:pgsphere，代码行数:12，代码来源:polygon.c

示例4: spherepoly_add_point

  Datum  spherepoly_add_point(PG_FUNCTION_ARGS)
  {
    SPOLY   * poly  =  ( SPOLY   * ) PG_GETARG_POINTER ( 0 ) ;
    SPoint  * p     =  ( SPoint  * ) PG_GETARG_POINTER ( 1 ) ;
    int32     size  = 0 ;
    SPOLY * poly_new = NULL;

    if ( p == NULL ){
      PG_RETURN_POINTER ( poly );
    }
    if ( poly == NULL ){
      size = offsetof(SPOLY, p[0]) + sizeof(SPoint) ;
      poly = ( SPOLY * ) MALLOC ( size );
      memcpy( (void*) &poly->p[0] , (void*) p, sizeof(SPoint) );
#if PG_VERSION_NUM < 80300
      poly->size = size;
#else
      SET_VARSIZE(poly, size);
#endif
      poly->npts = 1;
      PG_RETURN_POINTER ( poly );
    }

    poly = PG_GETARG_SPOLY( 0 );

    // skip if equal
    if ( spoint_eq (p, &poly->p[ poly->npts - 1 ]) ){
      PG_RETURN_POINTER ( poly );
    }

    // Skip if distance is equal 180deg
    if ( FPeq ( spoint_dist ( p, &poly->p[ poly->npts - 1 ]) , PI ) )
    {
      elog ( NOTICE , "spoly(spoint): Skip point, distance of previous point is 180deg" );
    }

    size = offsetof(SPOLY, p[0]) + sizeof(SPoint) * ( poly->npts + 1 );
    poly_new = palloc( size );
    memcpy( (void*) poly , (void*) poly_new, VARSIZE(poly) );
    poly_new->npts++;

#if PG_VERSION_NUM < 80300
    poly_new->size = size ;
#else
    SET_VARSIZE( poly_new, size );
#endif

    memcpy( (void*) &poly_new->p[poly->npts] , (void*) p, sizeof(SPoint) );
    PG_RETURN_POINTER ( poly_new );
  }

开发者ID:china-vo，项目名称:pgSphere，代码行数:50，代码来源:polygon.c

示例5: spherepoly_area

  Datum  spherepoly_area(PG_FUNCTION_ARGS)
  {
    SPOLY * poly = PG_GETARG_SPOLY( 0 ) ;
    int32 i;
    SPoint   s[poly->npts + 2];
    SPoint   stmp[2];
    SEuler   se;
    float8   sum = 0.0;
    
    memcpy( (void*)&s[1], (void*)&poly->p[0]      , poly->npts * sizeof( SPoint ) );
    memcpy( (void*)&s[0], (void*)&s[poly->npts]   , sizeof( SPoint ) );
    memcpy( (void*)&s[poly->npts+1], (void*)&s[1] , sizeof( SPoint ) );

    se.psi     = 0;
    se.phi_a   = EULER_AXIS_Z;
    se.theta_a = EULER_AXIS_X;
    se.psi_a   = EULER_AXIS_Z;

    for ( i=1; i<=poly->npts; i++ ){

       se.phi   = -PIH - s[i].lng ;
       se.theta = s[i].lat - PIH  ;
       euler_spoint_trans( &stmp[0] , &s[i-1] , &se );
       euler_spoint_trans( &stmp[1] , &s[i+1] , &se );

       stmp[1].lng -= stmp[0].lng;
       if ( FPlt(stmp[1].lng,0.0) ){
          stmp[1].lng += PID;
       }
       sum += stmp[1].lng ;

    }

    sum -= ( PI * ( poly->npts - 2 ) ) ;
    if ( FPge(sum,PID) ){
      sum = 2*PID - sum; 
    }

    if ( FPzero(sum) ){
      sum = 0.0;
    }

    PG_RETURN_FLOAT8 ( sum );
  }

开发者ID:mnullmei，项目名称:pgsphere，代码行数:44，代码来源:polygon.c

示例6: spherepoly_out

Datum
spherepoly_out(PG_FUNCTION_ARGS)
{
	SPOLY	   *poly = PG_GETARG_SPOLY(0);
	int32		i;
	char	   *out = (char *) palloc(128 * poly->npts);
	char	   *tmp;

	strcpy(out, "{");
	for (i = 0; i < poly->npts; i++)
	{
		if (i > 0)
		{
			strcat(out, ",");
		}
		tmp = DatumGetPointer(DirectFunctionCall1(spherepoint_out,
												  PointerGetDatum(&poly->p[i])));
		strcat(out, tmp);
		pfree(tmp);
	}
	strcat(out, "}");
	PG_RETURN_CSTRING(out);
}

开发者ID:yuejiesong1900，项目名称:pgsphere，代码行数:23，代码来源:output.c