| --- Log opened Wed Oct 16 00:00:55 2019 |
| --- Log closed Wed Oct 16 00:15:08 2019 |
| --- Log opened Wed Oct 16 00:20:14 2019 |
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| 14:15 | <@ErikMesoy> | Command line returns a divide by zero error as I start messing with graphics. I realize exactly where this must be before I even look at the trace: in my atan calls. |
| 14:16 | <@ErikMesoy> | I feel annoyed on mathematical principles because atan(1/0) has a perfectly sensible, valid interpretation as the angle of a vertical line. I look at the atan docs and feel vindicated because there's an overloaded atan(1,0) which does what I feel it should. :D |
| 14:19 | <~Vornicus> | that's more commonly called atan2 |
| 14:19 | <~Vornicus> | Which (if this overloaded thing is that) will also do the right thing for directions that have negative x values |
| 14:26 | <@ErikMesoy> | In this case I want only positive results, though, because I'm checking whether two lines through a point are too close and start overlapping as they're drawn |
| 14:30 | <~Vornicus> | Note that a lot of geometric stuff -- including basic angle facts -- can be cone without resorting to trig. |
| 14:31 | <~Vornicus> | like, my voronoi diagram thing? no trig at all. |
| 14:35 | <@ErikMesoy> | But I like trig. |
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| --- Log closed Thu Oct 17 00:00:57 2019 |