Modifications on VirtualEarth plugin

guil · 07-19-2008, 03:44 PM

I'm working on a new version of the VE plugin

I corrected some bugs concerning column and row wrap-around (tiles from south pole appearing in north pole, tiles with negative row or column indexes)

I removed the need for proj 4, by encoding directly the Mercator projection and simplified some code managing the projection. It should improve slightly the performances.

I also added a transparent border/road/name layer. It looks like this on the blue marble:

If anyone would like to test it and give me some feed back, the code is here :

http://cid-8efce06782cf7eb9.skydrive...rtualEarth.zip

bull · 07-20-2008, 11:24 PM

Wow that transparent mode is great, could you adjust the draw distance when tilted to be bigger? Ideally to the horizon, I'm not sure if that would be too much for low end systems to handle though, maybe a 'view distance' slider? While I'm at it any chance of adding a 'view location in birdseye' button, which would open a birdseye image of the current location (if available) in WW's browser?

Really great job gull.

guil · 07-21-2008, 10:27 AM

It would be easy to extend the number of tiles displayed when the tilt is important (one line of code). Of course, it would have an impact on performances but this is not the main problem. It would also increase the number of tiles to be downloaded, and this plugin tends to crash when downloading to much tiles at the same time. I'll try to correct this problem first.

James_In_Utah · 07-21-2008, 03:52 PM

Maybe that explains the behaviour I saw. I zoomed into one area, and I could see the VE tiles. When i zoomed out, panned over to another area, and zoomed in, the VE Icon appeared in the lower right hand corner, but the tiles never displayed on the screen. I attributed it to Microsoft have a bad day.
James

guil · 07-21-2008, 04:32 PM

I fixed the bug (I forgot to dispose of some resources). It seems stable on my system now. I don't manage to crash it anymore. I updated the code referenced in my previous post.

guil · 07-22-2008, 02:55 PM

I still updated the code. The main modifications concern the optimisation of the mesh creation algorithm. I worked in radian instead of degrees to reduce angle conversions. I also changed the way it reprojects. The overhead due to Mercator reprojection is now linear in Meshpointcount instead of quadratic previously. This could significantly improve performances when using large Meshpointcount.

I tested the new code under XP with a WIFI connection and under VISTA with a direct cable connection. It worked well in both cases.

TomServo · 07-23-2008, 02:17 AM

Wow, some nice improvements you have made. I guess now I can stop bitching at people to get it updated

10-01-2008, 01:30 AM

Absolutely awesome. After using it for a short period of time I have to say that I am pretty impressed with the updates

James_In_Utah · 10-01-2008, 07:04 AM

Very nice. I am seeing some strange bleedthrough when vertical exageration is set to 3X.

rubencb32 · 10-01-2008, 05:44 PM

Good new version of the VE plugin

07-19-2008, 03:44 PM	#1
guil Junior Member Join Date: Jul 2008 Location: Brussel Posts: 6	Modifications on VirtualEarth plugin I'm working on a new version of the VE plugin I corrected some bugs concerning column and row wrap-around (tiles from south pole appearing in north pole, tiles with negative row or column indexes) I removed the need for proj 4, by encoding directly the Mercator projection and simplified some code managing the projection. It should improve slightly the performances. I also added a transparent border/road/name layer. It looks like this on the blue marble: If anyone would like to test it and give me some feed back, the code is here : http://cid-8efce06782cf7eb9.skydrive...rtualEarth.zip

07-20-2008, 11:24 PM	#2
bull Cosmic Overlord Join Date: Oct 2004 Location: United Kingdom Posts: 2,362	Wow that transparent mode is great, could you adjust the draw distance when tilted to be bigger? Ideally to the horizon, I'm not sure if that would be too much for low end systems to handle though, maybe a 'view distance' slider? While I'm at it any chance of adding a 'view location in birdseye' button, which would open a birdseye image of the current location (if available) in WW's browser? Really great job gull. __________________ Bull_[UK] ooo00 Bullsworld.net 00ooo

07-23-2008, 02:17 AM	#7
TomServo God. Root. What is difference? Join Date: Sep 2004 Location: Eastern Pennsylvania Posts: 2,856	Wow, some nice improvements you have made. I guess now I can stop bitching at people to get it updated __________________ Earth is Square blog PUBLIC NOTICE AS REQUIRED BY LAW: Any use of this forum post, in any manner whatsoever, will increase the amount of disorder in the universe. Although no liability is implied herein, the consumer is warned that this process will ultimately lead to the heat death of the universe.

10-01-2008, 01:30 AM	#8
Dwayne Guest Posts: n/a	Yes! Absolutely awesome. After using it for a short period of time I have to say that I am pretty impressed with the updates

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07-21-2008, 10:27 AM	#3
guil Junior Member Join Date: Jul 2008 Location: Brussel Posts: 6	It would be easy to extend the number of tiles displayed when the tilt is important (one line of code). Of course, it would have an impact on performances but this is not the main problem. It would also increase the number of tiles to be downloaded, and this plugin tends to crash when downloading to much tiles at the same time. I'll try to correct this problem first.

07-21-2008, 03:52 PM	#4
James_In_Utah Super Member Join Date: Jan 2006 Location: Eden, Utah Posts: 1,446	Maybe that explains the behaviour I saw. I zoomed into one area, and I could see the VE tiles. When i zoomed out, panned over to another area, and zoomed in, the VE Icon appeared in the lower right hand corner, but the tiles never displayed on the screen. I attributed it to Microsoft have a bad day. James

07-21-2008, 04:32 PM	#5
guil Junior Member Join Date: Jul 2008 Location: Brussel Posts: 6	I fixed the bug (I forgot to dispose of some resources). It seems stable on my system now. I don't manage to crash it anymore. I updated the code referenced in my previous post.

07-22-2008, 02:55 PM	#6
guil Junior Member Join Date: Jul 2008 Location: Brussel Posts: 6	I still updated the code. The main modifications concern the optimisation of the mesh creation algorithm. I worked in radian instead of degrees to reduce angle conversions. I also changed the way it reprojects. The overhead due to Mercator reprojection is now linear in Meshpointcount instead of quadratic previously. This could significantly improve performances when using large Meshpointcount. I tested the new code under XP with a WIFI connection and under VISTA with a direct cable connection. It worked well in both cases.

10-01-2008, 07:04 AM	#9
James_In_Utah Super Member Join Date: Jan 2006 Location: Eden, Utah Posts: 1,446	Very nice. I am seeing some strange bleedthrough when vertical exageration is set to 3X.

10-01-2008, 05:44 PM	#10
rubencb32 Junior Member Join Date: Sep 2008 Posts: 1	Good new version of the VE plugin

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