double
lwtriangle_perimeter(const LWTRIANGLE *triangle)
{
if( triangle->points )
return ptarray_length(triangle->points);
else
return 0.0;
}
/**
* Compute the sum of polygon rings length.
* Could use a more numerically stable calculator...
*/
double
lwpoly_perimeter(const LWPOLY *poly)
{
double result=0.0;
int i;
LWDEBUGF(2, "in lwgeom_polygon_perimeter (%d rings)", poly->nrings);
for (i=0; i<poly->nrings; i++)
result += ptarray_length(poly->rings[i]);
return result;
}
