[postgis-devel] NEW setPoint4d() in lwgeom api

[strk at refractions.net]

I've exported a setPoint4d() function produced
for LRS functions.

The setPoint4d() function abstract pointarray
dimensions so that callers don't have to bother
about this.

For example, whatever dimensions a POINTARRAY
have you can always do something like:

	POINT4D buf;
	POINTARRAY *pa=<get_from_lwgeom>;
	unsigned int N=<an offset>;

	getPoint4d_p(pa, N, &buf);
	doSomethingToPoint4d(&buf);
	setPoint4d(pa, N, &buf);

setPoint4d will discard dimensions not supported
by the pointarray and appropriately align the supported
ones.

--strk; 

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