POINTF vs DPOINT

Using POINTF (e.g. for Pucker) saves 8 bytes in the RING struct, which reduces the disk throughput requirements for snapshot movies. It doesn't seem to measureably worsen CPU usage. The downside is trading 15 digits of precision for 7. For items that remain constant over the life of a ring (e.g. Pucker), it might not matter, but for items that are incremented per frame (e.g. origin), it definitely *does* matter.