What's the best projected image size using projectors?

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Originally Posted by sbecker777

Eric and everyone,
this is also a topic I've thought about for many years. The answer is just what our friend dcutugno suggests- BGL files set up for simmers to get proper sizing of projected images. I've started such a project.

In this scenery, I've modeled a set of 180 poles each 50ft high set in a 200ft diameter circle- one pole every 2 degrees. I place/slew my plane in the exact center of the circle of poles.

Based on how many poles I count at a given zoom, I can accurately and empirically obtain the actual horizontal Point of View (POV) in FS.

Next step is to model larger objects that I can accurately measure, and with a given distance from the object, measure how "big" it appears a given distance from my eyes. Translate that data to a BGL object to be placed in FS, and put the pilot's eyes the same distance from the known object.

Zoom or move the projector until the object in FS is the same size physically on the wall/screen as the real-world object and that's how I get the real world to be the same size as the virtual world.

Thoughts?
Steve

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Can i have this scenery?

Hi all

I just found a neat little utility for figuring all kinds of measurements that may prove helpful in planning your visual system. I love it and it's going to be put to the test over the next few days.

http://www.projectorcentral.com/Epso...ulator-pro.htm

You might also try this little utility. Use the 'Screen Size Calculator' button that is available when you view any projector's details.

http://www.projectorpoint.co.uk/proj..._EMP-400W.html#

Actually, a "how-to" FAQ for surround projection might not be a half bad idea. There are a few things I really think that are important that might be covered.

1) First curface mirrors.
-How to shorten the projector throw
-Why first surface and not just any old mirror
-Affordable sources for first-surface mirrors
2) 16:9 vs. 5:4
-How screen aspect ratio directly effects immersion and screen design
-2x 16:9 or 2x 5:4?
-3x 5:4 TH2G?
3) Screen design considerations.
-Portible design?
-simpit room dimentions and realistic projector throw dimentions
-Affordable screen material sources
-misc other considerations
4) Software considerations
-Sol7
-SoftTH
-misc other software

I'm not at a point where I can definitevely answer half of those questions, but I know between all of us in the forums most can be outlined in detail and posted as a FAQ.

A quick and dirty way.
In Tomlins case seeing he is using a learjet.
Find a learjet parked on the tarmac somewhere and taxi up to it. This should allow you to set the view height as you will be looking straight into the pilots eyes from where you are sitting. You should also be able to measure the width of the cockpit to set your perspective. This should be easy as the lear is about 1.6 meters across, your projector should be able to project this image size.
One thing to watch with projectors is the flyscreening, a 800X600 will be worse than one using 1024x768. I have a 1024x768 projector and I sit about 2 meters away, and its just on the flyscreening limit.

my 2c :D

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Originally Posted by alaxus

One thing to watch with projectors is the flyscreening, a 800X600 will be worse than one using 1024x768. I have a 1024x768 projector and I sit about 2 meters away, and its just on the flyscreening limit.

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I'm assuming you mean the screen door effect LCD projectors have? Really, you get so used to it if you run LCD projectors that you pretty much forget about it. Isn't this issue gone in DLP projectors?

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Originally Posted by alaxus

A quick and dirty way.
In Tomlins case seeing he is using a learjet.
Find a learjet parked on the tarmac somewhere and taxi up to it. This should allow you to set the view height as you will be looking straight into the pilots eyes from where you are sitting. You should also be able to measure the width of the cockpit to set your perspective. This should be easy as the lear is about 1.6 meters across, your projector should be able to project this image size.
One thing to watch with projectors is the flyscreening, a 800X600 will be worse than one using 1024x768. I have a 1024x768 projector and I sit about 2 meters away, and its just on the flyscreening limit.

my 2c :D

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That's a decent way to do this man! Thanks for that idea, I will try it to test where I am now. Another thing I do is do the exterior view on the rear to insure the a/c is on the center line and then I go back inside for my fwd view and insure that I minimize the 'crab' effect. So far, I really see no issue with it like so many others have. I have set my view/eyepoint cfgs per the Nic D method, and it works pretty good. I will have some update pics soon!

Hello to all,

This is the best software I ever find for visual calculations accoriding to room shape, size and the type of projections frond, back, one mirro, two mirrors etc. The result is that you get all the figures as pdf together with the drawings and the program calculates also the best projector (firm and type). You must create an account first.

http://hcinema.avtool.net/site/index.php?lng=en

Best regards,
Achilles

Unfortunately I get this when I try to register :(

<!-- class="sidebox" id="language" --><!-- id="col3_content" class="clearfix" --><!-- Mittlere Spalte -->Fatal error creating page!

Please contact the webmaster.

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Originally Posted by Matt Olieman

Unfortunately I get this when I try to register :(

<!-- class="sidebox" id="language" --><!-- id="col3_content" class="clearfix" --><!-- Mittlere Spalte -->Fatal error creating page!

Please contact the webmaster.

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Have you created an account? If yes, forget the message and at the left side bar click to create new project. Then use the avTool. I checked right now and works fine. I get also this message.

Achilles