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Analysing a static camera

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Moog Gravett
Analysing a static camera
on May 24, 2016 at 12:07:32 pm

Hi folks,

I can't believe I've not come across this before, and I can't find any tuts, but can anyone give me some advice on how to solve a camera for a static image.

I have need to add some items in element 3d to a scene with an isometric view (similar to this one)


For the life of me, I can't figure it out. I thought I had it at one point, but the FOV was wrong, and the camera adjustment didn't seem to make any difference.

I tried solving a vanishing point in photoshop, but I couldn't see the option to export it.

Any ideas anyone?

Cheers,

Moog


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Dave LaRonde
Re: Analysing a static camera
on May 24, 2016 at 2:34:25 pm

What's there to solve? It isn't moving.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Moog Gravett
Re: Analysing a static camera
on May 24, 2016 at 3:03:26 pm

Sorry, thought I was clear.

I need to align a camera to this view. Matching FOV etc so I can add in new 3d elements.

I can't quite work out how to set up my 3d space in AE to match this view.


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Soham Jani
Re: Analysing a static camera
on May 24, 2016 at 5:54:29 pm

Well, it's static, so just create the solid with E3D and add the desired object, and then just position it with the particle replicator and the particle look. I'm.....I'm not sure what you're trying to do? You can motion track something moving I guess, but other than that, I'm a little unclear.

"It's all around us Neo, temporary constructs of time....."


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John Cuevas
Re: Analysing a static camera
on May 24, 2016 at 6:11:55 pm

For something like this, I would create a large solid and add a grid to it, enable 3D. Parent a camera to the solid layer then adjust the solid until the grid lined up in a way I felt was correct.

Johnny Cuevas, Editor
ThinkCK

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.


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Moog Gravett
Re: Analysing a static camera
on May 24, 2016 at 7:04:16 pm

Hi folks.

It's exactly that I'm having trouble with. I've greated a grid, but no matter how I manipulate it or the camera, I just can't seem to line it up.

I know this must seem basic, I've used AE for years, but just not come across this, and can't get my head around it.

any advice is welcome.


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Walter Soyka
Re: Analysing a static camera
on May 24, 2016 at 8:49:19 pm

Ae doesn't support rendering to isometric views.

Make a very distant camera with a very long focal length (set the camera's zoom to a really, really large number like 50,000, and set its Z-position to that number's negative, like -50,000 ). Rotate your 3D scene elements 30 degrees in both X and Y.

You might also try to fake it in 2D.

Walter Soyka
Designer & Mad Scientist at Keen Live [link]
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
@keenlive [twitter]   |   RenderBreak [blog]   |   Profile [LinkedIn]


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Moog Gravett
Re: Analysing a static camera
on May 24, 2016 at 10:14:51 pm

Thanks - I'll give that a try :D


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Kalle Kannisto
Re: Analysing a static camera
on May 26, 2016 at 9:25:27 am

There's nothing 3D about that scene, so I wouldn't use a camera, just plain point (or planar) tracking to attach objects.

For the 3D objects, you just need to prerender a still of the object with alpha, rotated 45 degrees on Y axis and 30 or 45 on the X axis.


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Walter Soyka
Re: Analysing a static camera
on May 26, 2016 at 12:02:44 pm

If you're doing it in 2D, here are some instructions for setting up an isometric grid position animation that I wrote up a while back [link]:

Position a 2D layer which you'd like to move over the isometric grid in the center of your origin tile.

Add a Point Control effect to the layer and name it "Grid Position".

Add a Slider Control effect and name it "Tile Width". Measure the width of your isometric tile in pixels and adjust this slider accordingly.

Add a Slider Control effect and name it "Tile Height". Measure the height of your isometric tile in pixels and adjust this slider accordingly.

Alt+click the position stopwatch and enter the following expression:
xGrid = effect("Grid Position")("Point")[0];
yGrid = effect("Grid Position")("Point")[1];
x = (xGrid - yGrid) * effect("Tile Width")("Slider")/2;
y = (xGrid + yGrid) * effect("Tile Height")("Slider")/2;
value + [x,y]



You can now use the Grid Position effect to address the screen in tile units.

Walter Soyka
Designer & Mad Scientist at Keen Live [link]
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
@keenlive [twitter]   |   RenderBreak [blog]   |   Profile [LinkedIn]


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Moog Gravett
Re: Analysing a static camera
on May 27, 2016 at 10:02:57 am

Thanks to you all for the help. Unfortunately I had to abandon the idea as the deadline was looming, but it'll come in handy for the future.

Cheers,
Moog


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