2010/8/21 Fabio Varesano <fabio.vares...@gmail.com>: > Hi David, > > thanks for your input. Unfortunately I don't think that readline() is > the problem here. > > Of course, readline() is blocking until it gets a '\n' but I'm sending > something like 200/300 lines/seconds with Arduino (each line contains > an ending '\n' see Arduino code at http://arduino.pastebin.com/KNAmnScS). > > This is actually confirmed if I uncomment the print x_rot statement: > this would result in lot of prints in the Python stdout meaning that > the read has been successful and fast. > > FV >
you are rotating inside begin_round, which is wrong. You should do the following: in one side (probably a thread), you should read the data from the serial port and accumulate it. In the other side (soya's main thread), inside the begin_round function you should read the accumulated data and put it inside some object variables (like rot_inertia_x and so). Then, advance_time(proportion) function will get called several times, each one with a proportion value. Always, between begin_round and end_round are N advance_time calls and the sum of proportion argument for those calls will be 1. So you should rotate there, in advance_time, but multiplied per proportion. If really the code used to read the data from serial takes less than 1ms, you can put it in begin_round directly (so no threading is required), but i prefer to do threading. Take in account that in a 3D app, each funciton gets called over 50 times per second (or more), a small amount of time spent inside of them counts a lot. _______________________________________________ Soya-user mailing list Soya-user@gna.org https://mail.gna.org/listinfo/soya-user
