[Flightgear-devel] Rounding in nav/comm frequencies?
Any clues as to why, when I try to display the output of /instrumentation/comm/frequencies/selected-mhz etc on my Comm radio, The output gets rounded down or reduced by 0.01 in some cases but not others. ie: set 120.5 displayed 120.49 set 120.8 displayed 120.8 The animation method I've used: http://www.cyfinity.com/fgfs/kx155-3d.xml The displayed result: http://www.cyfinity.com/fgfs/navcomerror.jpg :-/ To be fair, I'm really chuffed to have got it working at all but it's annoying to get so close ;-) Cheers Dave Martin ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Rounding in nav/comm frequencies?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Dave Martin schrieb: | Any clues as to why, when I try to display the output | of /instrumentation/comm/frequencies/selected-mhz etc on my Comm radio, The | output gets rounded down or reduced by 0.01 in some cases but not others. | | ie: set 120.5 displayed 120.49 | | set 120.8 displayed 120.8 | Floating point rounding error? (There are many simple numbers that we use, that floating point numbers can't represent. E.g. 0.01) If the floating point number gets cut off and not rounded you'll also might get that effect. Could you try to add 0.005 before rounding/cut off and see if that helps? CU, Christian -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFB1XfnlhWtxOxWNFcRAiNpAKCy8S8LY4ExvB5Ah3yXGkjwmYzf4ACeMuw7 HwBQsU+LdstXGCkSxqPi3co= =ZnKj -END PGP SIGNATURE- ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Rounding in nav/comm frequencies?
Christian Mayer wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Dave Martin schrieb: | Any clues as to why, when I try to display the output | of /instrumentation/comm/frequencies/selected-mhz etc on my Comm radio, The | output gets rounded down or reduced by 0.01 in some cases but not others. | | ie: set 120.5 displayed 120.49 | | set 120.8 displayed 120.8 | Floating point rounding error? (There are many simple numbers that we use, that floating point numbers can't represent. E.g. 0.01) If the floating point number gets cut off and not rounded you'll also might get that effect. Could you try to add 0.005 before rounding/cut off and see if that helps? CU, Christian Perhaps we could export each side of the decimal point as seperate integers in the property tree to make life easier for panel designers? Curt. -- Curtis Olsonhttp://www.flightgear.org/~curt HumanFIRST Program http://www.humanfirst.umn.edu/ FlightGear Project http://www.flightgear.org Unique text:2f585eeea02e2c79d7b1d8c4963bae2d ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Rounding in nav/comm frequencies?
On Friday 31 Dec 2004 16:01, Christian Mayer wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Dave Martin schrieb: | Any clues as to why, when I try to display the output | of /instrumentation/comm/frequencies/selected-mhz etc on my Comm radio, The | output gets rounded down or reduced by 0.01 in some cases but not others. | | ie: set 120.5 displayed 120.49 | | set 120.8 displayed 120.8 Floating point rounding error? (There are many simple numbers that we use, that floating point numbers can't represent. E.g. 0.01) If the floating point number gets cut off and not rounded you'll also might get that effect. Could you try to add 0.005 before rounding/cut off and see if that helps? Not sure if I follow (I am no coder - just a modeller ;-) ) I'm not trying to round the output - it appears that FG is doing that and I need to prevent it to get a correct output on the display. ie: if /instumentation/comm/frequencies/selected-mhz reports 120.5 in the properties browser, it is actually displaying 120.49 Sorry if I'm not making much sense :-/ Dave Martin ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Rounding in nav/comm frequencies?
On Friday 31 Dec 2004 16:03, Curtis L. Olson wrote: Perhaps we could export each side of the decimal point as seperate integers in the property tree to make life easier for panel designers? Curt. I did look at it and wonder that two seperate values would come in handy. Of course, as far as I can see, this would instantly break all the aircraft using the 2d panel :-/ Dave Martin ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d