Map moving in jerks and not moving smoothly?

newmikey

I experienced the following:

TT5 freshly installed has this incredibly smooth scroll around corners and roundabouts with the whole map slowly rotating into the new direction. As soon as I included my TT3 speedcam files on the memory card the screenspeed went back to the jerky pre-5 days.

I inspected both the poi and bmp files associated with the speedcam(and other) POI's. The poi-file itself is identical, but the associated bmp file differs from the TT3 files in size and number of colors. TT3 had 24bpp 22x22 pixel bitmaps, TT5 seems to have 256 color 16x16 pixel icons. Also, the screen slows down when calculating too many POI's.

Now, I checked whether this was a function of cardsize (used the Benelux map on 128, 256 and 512Mb cards): it is not, or not noticably so.

I also checked whether there is a connection with cardspeed. I have only a superslow 512 Kingston CF and a 45x reasonably fast noname 256 out of my camera. No effect noticed.

To the POI files themselves:
Old bitmaps (22x22 24bpp) shown on screen - screen moves in jerks
Old bitmaps (22x22 24bpp) not shown on screen but picked up by the warning system - screen also moves in jerks
New bitmaps (16x16 8bpp) shown on screen - screen moves in jerks
New bitmaps (16x16 8bpp) not shown on screen but picked up by the TT5 proximity warning - PRESTO! The screen scrolls silky smooth.

I did notice a correlation with the poi file size (not the bitmap). Anything over 100Kb sends the screen back to jerky motion.

So here's the solution I worked out:
1) Make sure you copy the mapdata over on a freshly formatted card, do not add any POI files.
2) Run TT5 and choose to make a new POI category.
3) Name the category anything you like. If you use a space in the name on the TT5 keyboard, the resulting filename will contain an underscore character in that place.
4) Choose one of TT5's built-in bitmap icons to represent the category.
5) Repeat 2,3 and 4 for as many categories as you have POI files.
6) You now have an x-number of bitmap icons with their associated POI files in the map-directory. The POI-files show 0 size. (they are still empty)
7) Now rename the POI-files on your computer to the exact same names as the ones on the memory card. Remember to replace spaces with underscores! (The difference may be hard to see when the file is selected.
8) Copy over the POI files only! Discard the associated bmp icons on your computer.
9) Run TT5 and choose to show as many POI's as you want shown on the map BUT NOT the imported ones!
10) Set the proximity detector warning sounds for the imported categories.

That's it! The map will scroll as smooth as before, the radar warnings will show up only when they come in range. Your roundabouts will never be the same again.

I hope this may be of help, if it's already posted somewhere else on this forum please excuse me.

Skids · Regular Visitor Joined: Oct 08, 2004 Posts: 71

Thanks for that info.

I have actually uninstalled TTN5 and have put back TTN3 but I may give it another try now.

I still think it is pretty rubbish though that a newer version cannot cope with something that the old one did with no problems whatsoever.

spile · Regular Visitor Joined: May 08, 2004 Posts: 163

Can the jerky / smooth effect be tested using Demo mode?

newmikey · Posted: Tue Jun 14, 2005 11:28 am Post subject:

spile · Regular Visitor Joined: May 08, 2004 Posts: 163

It may be me but using the speed camera database POI (presumably old format BMP?), I can't tell any difference in smoothness between POI on and POI off?

linknet · Frequent Visitor Joined: May 05, 2005 Posts: 872

Thats an interesting post, I shall have to read it again to fully understand it.

TTN5 is obviously refreshing the screen more frequently to achieve the smooth scrolling and must be accessing the POI files on every refresh, hence much slower.

A very simple solution which works for me is to "Hide POI" for the navigator view, you get full speed scrolling and the "Warn when near POI" still works. The POI also still shows on screen when in range even with "Hide POI" enabled.

Roger

newmikey · Posted: Tue Jun 14, 2005 12:10 pm Post subject:

gmoorc · Occasional Visitor Joined: May 16, 2005 Posts: 50

Thanks for this post.
I was experimenting last night trying to work out why the scroll had dropped to about 1fps and eventually came to the same conclusion.
Nice to have it confirmed. It happened after I added the speedcam POI's.

To get the POI's to appear with the proximity warning I assume you tick each one in "Enable/Disable POI" and then select "Hide POI".
They will then appear at whatever distance you set in "Warn when near POI"?

newmikey · Posted: Tue Jun 14, 2005 1:15 pm Post subject:

linknet · Frequent Visitor Joined: May 05, 2005 Posts: 872

linknet · Frequent Visitor Joined: May 05, 2005 Posts: 872

julianbarker · Lifetime Member Joined: Apr 12, 2005 Posts: 431

I think this is a TT5 problem and not anythign to do with POIs. I used to run TT4 and that ran smoothly on a slow PPC with all UK speed cameras showing, plus other databases, including one POI database with over 6000 POIs in it! On upgrading to TT5 I ofen find TT is displaying my location several seconds behind where I am unless I turn off display of *all* POIs. Clearly, TT have ballsed somethign up here.

gmoorc · Occasional Visitor Joined: May 16, 2005 Posts: 50

newmikey · Posted: Tue Jun 14, 2005 4:28 pm Post subject:

newmikey · Posted: Tue Jun 14, 2005 4:31 pm Post subject:

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