C++ (Cpp) ptarray_is_closed_3d示例

示例#1

文件： ptarray.c 项目： gbroccolo/postgis

int
ptarray_is_closed_z(const POINTARRAY *in)
{
	if ( FLAGS_GET_Z(in->flags) )
		return ptarray_is_closed_3d(in);
	else
		return ptarray_is_closed_2d(in);
}

示例#2

文件： lwtriangle.c 项目： gbroccolo/postgis

/*
 * Construct a triangle from a LWLINE being
 * the shell
 * Pointarray from intput geom are cloned.
 * Input line must have 4 points, and be closed.
 */
LWTRIANGLE *
lwtriangle_from_lwline(const LWLINE *shell)
{
	LWTRIANGLE *ret;
	POINTARRAY *pa;

	if ( shell->points->npoints != 4 )
		lwerror("lwtriangle_from_lwline: shell must have exactly 4 points");

	if (   (!FLAGS_GET_Z(shell->flags) && !ptarray_is_closed_2d(shell->points)) ||
	        (FLAGS_GET_Z(shell->flags) && !ptarray_is_closed_3d(shell->points)) )
		lwerror("lwtriangle_from_lwline: shell must be closed");

	pa = ptarray_clone_deep(shell->points);
	ret = lwtriangle_construct(shell->srid, NULL, pa);

	if (lwtriangle_is_repeated_points(ret))
		lwerror("lwtriangle_from_lwline: some points are repeated in triangle");

	return ret;
}

示例#3

文件： lwpoly.c 项目： sensorseverywhere/se

int
lwpoly_is_closed(const LWPOLY *poly)
{
	int i = 0;
	
	if ( poly->nrings == 0 ) 
		return LW_TRUE;
		
	for ( i = 0; i < poly->nrings; i++ )
	{
		if (FLAGS_GET_Z(poly->flags))
		{
			if ( ! ptarray_is_closed_3d(poly->rings[i]) )
				return LW_FALSE;
		}
		else
		{	
			if ( ! ptarray_is_closed_2d(poly->rings[i]) )
				return LW_FALSE;
		}
	}
	
	return LW_TRUE;
}