I used the parameter vramrequired according to your instructions and
added the parameter: vramrequired=30, aiming to offer hardware
acceleration smoothness to all using graphic cards with 32 mb or less.
This is the strongest DevalVR feature, I think.
All of my panos use less than 30 mb vram, measured with 'Debug->Show
info' method, at any zoom/FOV.
Testing it on a Windows XP Pro SP2 machine and GeForce2MX/MX400 (32
MB) it does not seem to be working correctly. Tested it with 6
different panos in Explorer and Firefox. The DevalVR version installed
is the latest one: 0.5.0.0.
--- In PanoToolsNG@yahoogroups.com, "fierodeval" <fierodeval@...> wrote:
> Hi all,
> I write this message here because I think this is important for better
> user experience with DevalVR pages.
> Latest versions of DevalVR optimize the VRAM (video memory) required
> for hardware acceleration. You can see the VRAM used by the panorama
> in real time if you select 'Debug->Show info' in context menu (right
> button menu).
> VRAM used depends of the resolution of the image, the type of panorama
> (cubic or equirect) and ZOOM value (FOV). Equirect panos are worse
> than cubic for hardware acceleration, because equirect requires a lot
> of memory to show zenit and nadir parts (top and bottom of the pano).
> Cubic panoramas are more continuous in all directions. VRAM amount
> used is bigger too with a bigger FOV and it's smaller with a smaller
> FOV. For this reason, it's difficult to calculate the required amount
> of VRAM automatically, to enable or disable hardware acceleration in a
> I created a new parameter 'vramrequired' for DevalVR to specify the
> exact amount of VRAM required for the displayed panorama.
> For example, this Andrei Bodrov's panorama
> http://panorama.ebeling.ee/show/?id=39 requires 20MB of VRAM with
> default FOV, and not more than 30MB of VRAM if FOV value is smaller
> than 90. With a similar panorama, a photographer could limit the FOV
> value to 90 and add the parameter: vramrequired=30 . Then a user with
> a video card with only 32MB of VRAM could see this pano with hardware
> acceleration, improving his experience.
> This parameter can increase the number of users that can see the
> panorama with hardware acceleration, or it can be used by the author
> to choose the quality of his images and the minimum requirements (for
> hardware accel.)
> best regards