True Position of a Rotate Center Rotated Layer

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True Position of a Rotate Center Rotated Layer

Postby im42n8 » Tue Jul 04, 2017 2:28 pm

Proshow incorrectly reports the actual position of a layer that has been rotated on a non-zero valued rotate center.

Add two layers. Fit to Frame is their scale and 50% zoom. Let their aspect be 1280:720 (or 16:9). Position each at screen center. Rotate each layer 45 degrees. Select one of the layers and give it a rotate center of -50, 50. What happened is that its position changed downward, toward the screen bottom. Still, you'll note that the pan values for that layer are still 0,0. That's because the rotation did NOT occur on the layer center but on the rotation point given by the rotate center values. This offset the layer's physical position (layer center) ...but the layer doesn't actually know that and ProShow does NOT report that information.

If you needed the layer with the non-zero rotate center value to actually reside exactly underneath the other rotated layer (which has zero value rotate center values), then you need to do some fiddling around. If you're careful, you might find the right spot. In truth, this scenario has the layer with the non-zero rotate center needing pan values of -2.621, -38.749 to align perfectly with the other rotated layer.

The method used to figure out the exact values is technical. This link is to a demonstration of tool that does the work for you: https://youtu.be/74-n9bIPvuw
When you need this functionality, anything that helps reduce the time and effort required is a plus!

Dale
What's New: Tools for ProShow: v11.42a Access ProShow capabilities Photodex doesn't provide (For PSG & PSP).
FPVP Blog "Making the Difficult Easier," FPVP News

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Re: True Position of a Rotate Center Rotated Layer

Postby Jeep » Fri Jul 07, 2017 8:35 am

Hi Dale,
What should be wicked : adjust the rotate center by a simple click on the exact position on screen or selecting a point already drawn (like the corner of a previous layer). Anyway, your tools are awesome.
Jean-Pierre

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Processor: Intel Quad core 2.33 Ghz - RAM: 4 Gb - Windows 7 64 bits - Video: Nvidia 9600GT 1 Gb- Camera : Canon 5D Mark II + 24-105 + 100-400 - Sharing : jean_pierre

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Re: True Position of a Rotate Center Rotated Layer

Postby im42n8 » Fri Jul 07, 2017 9:16 am

Hi Jeep! Yeah ... It's been asked for... years ago. It sure would be nice.

Too, it would be nice if Photodex implemented the full capabilities offered by ProShow to the rotate center function. What they initially did was to provide only the functionality of a layer's rotation on other than layer center. Previous to v4, that's the only rotation point available. However, they have never revisited the issue. So, if you want to take advantage of that function, you have to figure out how to do it yourself. Bummer eh?

The help file says that the only valid values for Rotate Center are plus or minus 50. Actually, the numbers are limited to whatever the pan values are. The only USEFUL values (unless you know a little more about ProShow) are those values defined as being within the confines of the layer ... that is plus or minus 50.

When you know that Pan, Zoom, and Rotate Center are all inter-related, you can access the full capability of rotate center. That includes being able to use a specific screen location around which to rotate any number of different layers.

Photodex, if they provided access to the full capability of the Rotate Center function, would have to provide all kinds of changes throughout the program. It will affect what information they'll have to provide to the user. It's non-trivial...and probably one of the reasons they have yet to do it. I discovered this relationship just over 7 years ago this month (about a year after the release of v4). Photodex has yet to address it in that whole time . It's been long over a year since the last release ... one can only hope they're going to offer some long overdue updates to a number of existing features (Rotate Center being among them). We've been disappointed before ... but, we remain hopeful!

Dale
What's New: Tools for ProShow: v11.42a Access ProShow capabilities Photodex doesn't provide (For PSG & PSP).
FPVP Blog "Making the Difficult Easier," FPVP News

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Re: True Position of a Rotate Center Rotated Layer

Postby Jeep » Sat Jul 08, 2017 9:21 am

With one release every 12 months and a half, they are guaranteed for a paying upgrade each time, the free one year upgrade becomes a delusion unless it's a real new version with excellent features. But, if the upgrade is only a replastering of the previous release with some poor amendments and a few bug fixed, no one is interested and the software will gradually lose its primacy, this is the main risk of Photodex.
Jean-Pierre
Last edited by Jeep on Sun Jul 09, 2017 12:11 am, edited 1 time in total.
Jean-Pierre

My website
Processor: Intel Quad core 2.33 Ghz - RAM: 4 Gb - Windows 7 64 bits - Video: Nvidia 9600GT 1 Gb- Camera : Canon 5D Mark II + 24-105 + 100-400 - Sharing : jean_pierre

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Re: True Position of a Rotate Center Rotated Layer

Postby im42n8 » Sat Jul 08, 2017 4:03 pm

:D
You don't say!

(I think a number of us voiced something similar ... the last two "major" updates.)

:D

Dale
What's New: Tools for ProShow: v11.42a Access ProShow capabilities Photodex doesn't provide (For PSG & PSP).
FPVP Blog "Making the Difficult Easier," FPVP News

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