[aprssig] New icon images

Gregory A. Carter gcarter at openaprs.net
Mon Aug 25 12:09:37 CDT 2014


I do just about the same thing, keep track of their initial position prior
to rotating, only they are updatable json files.

Greg


On Fri, Aug 22, 2014 at 12:05 AM, Heikki Hannikainen <hessu at hes.iki.fi>
wrote:

> On Fri, 22 Aug 2014, SARTrack Admin wrote:
>
>  I see that you actually rotate your icons... Its a nice idea, and when it
>> comes to an airplane icon, which is an arrow anyway, that looks logical.
>> But when it is a car, you only only have to rotate it, but also flip it
>> when it goes in the oposite direction of the original drawing.
>>
>
> Right. My code flips the airplane too, just to reduce code complexity. :)
>
> For the web site version, all rotations have been pregenerated during the
> software build process. It's a lot of little images, 19169 of them (number
> of symbols * overlays * rotations).
>
>
>  And how do you deal with icons which realy should never rotate (house),
>> but the direction data may not be exactly zero (and this may happen). Do
>> you have additional data attached to an icon saying, 'never rotate'?
>>
>
> I have a map/dictionary/hash of symbols which can be rotated, and the
> original direction they're pointing at in the source image. I can publish
> that together with the symbols if it's useful.
>
>     NSDictionary *initDirectionalSymbols = @{
>                             @"/'": @0,
>                             @"/(": @90,
>                             @"/*": @90,
>                             @"/<": @90,
>                             @"/=": @90,
>                             @"/>": @90,
>                             @"/C": @90,
>                             @"/F": @90,
>                             @"/P": @90,
>                             @"/S": @0,
>       ....
>
> Actually, here's the machine-readable CSV/JSON/XML/YAML -formatted symbol
> descriptions index which I published a couple months ago. I should put the
> degree values there, maybe. Bob's original list is a bit difficult to use
> in an application - whenever there are changes, they need to be manually
> merged in each application config. A machine-readable index might be
> helpful and easier to synchronize to apps.
>
> https://github.com/hessu/aprs-symbol-index
> https://github.com/hessu/aprs-symbol-index/tree/master/generated
>
>
>   - Hessu
>
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