vrthree
Posts: 32
Location: Leeds, United Kingdom
Registered: 17 Aug 2005
|
Cube face sizes
Posted: 19 Jun 2008 at 10:40 GMT
|
|
|
What is the best way to work what is the best cube face size when converting a equirectangular image?
|
|
alert moderator
|
|
fiero
Posts: 251
Location: La Rioja, Spain
Registered: 6 Jul 2005
|
Re: Cube face sizes
Posted: 19 Jun 2008 at 11:17 GMT
|
|
cubeface size = equirect width / PI
regards!
|
|
alert moderator
|
|
vrthree
Posts: 32
Location: Leeds, United Kingdom
Registered: 17 Aug 2005
|
Re: Cube face sizes
Posted: 19 Jun 2008 at 11:23 GMT
|
|
|
PI takes me back a few yaers, thanks!
|
|
alert moderator
|
|
Paul Thomas
Posts: 35
Location: East Sussex, United Kingdom
Registered: 7 Nov 2007
|
Re: Cube face sizes
Posted: 19 Jun 2008 at 11:53 GMT
|
|
Hi all,
Like many others, as a newbie I find this forum is invaluable for information, ideas and technical solutions.
I also sure that it has been covered before but the forum search appears to be unavailable presently. 
For cube faces, are there optimum sizes to view as a a small window or as full screen as give the option when viewing the gallery here?
|
|
alert moderator
|
|
iam360Texas
Posts: 62
Location: Fort Worth, Texas, United States
Registered: 12 Jul 2006
|
Re: Cube face sizes - More
Posted: 19 Jun 2008 at 13:51 GMT
updated: 19 Jun 2008 at 13:54 GMT
|
|
for equirectangular panoramas (2 wide :1 high)
5000w x 2500h where 5000/ 3.14 (PI) = 1592 pixel square
4000w x 2000h where 4000/ 3.14 = about 1274 pixels square
I think with Pano2VR its possible to reduce these large images (5000 x 2500) about 80mb down to Flash 1.5mb suitable for the internet viewing at either small or full screen viewing.
Adobe Flash viewer has hard upper limit of 2880 pixels square
Inverse 2880 x 3.14 = about 9043 width
|
|
alert moderator
|
|
Hans Nyberg
Posts: 803
Location: Denmark
Registered: 28 Aug 2005
|
|
Paul Thomas
Posts: 35
Location: East Sussex, United Kingdom
Registered: 7 Nov 2007
|
Re: Cube face sizes - More
Posted: 19 Jun 2008 at 15:32 GMT
|
|
Thank you both for your answers. Invaluable as always 
|
|
alert moderator
|
|
Doug Aurand
Posts: 696
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
|
Re: Cube face sizes - More
Posted: 19 Jun 2008 at 16:10 GMT
|
|
Paul
I'm not sure how PI figures into coverting Equirectangular Projections into Cubes.
What's makes more sense to me is that an Equirec Projection horizontal measurement (width) is 360° around the "globe" at the "equator" and the vertical measurement (height) is 180° from the North Pole to the South Pole, or half the Equator
And the height or width of 2 cube faces would be half-way-around the cube.
So half the height of a EquirecProjection would make a good size for the Cube Faces to get a similar size Cubic Image, relative to the original Equrectangular Projection
Does that make sense?
Doug Aurand
Albuquerque, NM
|
|
alert moderator
|
|
iam360Texas
Posts: 62
Location: Fort Worth, Texas, United States
Registered: 12 Jul 2006
|
Re: Cube face sizes - More
Posted: 19 Jun 2008 at 22:01 GMT
|
|
Thank you Hans,
We have a 6 mbps connection... it still took 3 reloads to get the entire image visible.
Ok.. now I understand.
|
|
alert moderator
|
|
