powder/src/elements/ligh.c, branch solidswork

Remove old code

2012-11-17T19:43:59Z

Use atan2 for LIGH angle calculations

2012-06-28T23:04:46Z

atan2 gives the actual angle (in the range -pi to pi). acos and asin just
give the principal value (in the range 0 to pi, or -pi/2 to pi/2)

Lightning direction affected by Newtonian gravity

2012-06-26T23:52:12Z

Revert "Make THDR TYPE_ENERGY again, so it goes in photon map"

2012-06-10T20:29:16Z

This reverts commit 8b20bfd764308fddc1280b8a9d030e77503d0b0c.

TYPE_ENERGY makes THDR move like photons, and means adjacent particles
don't conduct as much heat from it (since the heat conduction code only
looks for particles in pmap, not photons).

Heat transfer could be fixed by increasing THDR's heat conductivity, but
gas or powder movement is probably better than photon movement for THDR.

Make THDR TYPE_ENERGY again, so it goes in photon map

2012-06-09T10:08:11Z

Will simplify checking for excessive stacking

Added GPLv3+ license headers to all files in src/elements/

2012-05-06T11:55:05Z

Fix glow for deut at ligh

2012-03-17T18:15:45Z

Merge latest FIGH additions

2011-10-26T16:10:21Z

Made a special structure for stick mans.

2011-10-26T14:36:00Z

Merge latest with graphicstest

2011-10-25T10:31:21Z