Image Rotation

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MaxV
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Re: Image Rotation

Post by MaxV » Wed Sep 06, 2017 8:41 am

bidgeeman wrote: Trying to import an image from a folder without using the loc so that it will rotate without distortion. problem is that when I import an image it is larger than the stack so I resize it on import. All good there but when I rotate the image with a slider it pops back to it's original size. How do you overcome this?
Resize the image, then:

Code: Select all

set the imageData of image myImage to the imageData of image myImage
then you can rotate it.

See http://livecode.wikia.com/wiki/ImageData
Livecode Wiki: http://livecode.wikia.com
My blog: https://livecode-blogger.blogspot.com
To post code use this: http://tinyurl.com/ogp6d5w

bidgeeman
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Re: Image Rotation

Post by bidgeeman » Wed Sep 06, 2017 9:05 am

Hi MaxV.
Please forgive my new user ignorance but when the code refers to "myImage" does that have to be a pathway that refers to an actual image like: image "1" of stack Images? I tried that and it did not work?

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set the imageData of image "i1" of stack "ImageArea" to the imageData of image "i1" of stack "ImageArea"
I am using a slider to rotate the image

Code: Select all

   set the angle of image "i1" of stack "ImageArea" to pScrollValue
Bidge

Klaus
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Re: Image Rotation

Post by Klaus » Wed Sep 06, 2017 11:01 am

Hi David,

you only need a long descriptor in scripts if the object is not on the current card of the defaultstack!

Don't forget to also add the CARD to it:
... imageData of image "i1" OF CD 2 of stack "ImageArea", if the "target" stack has more than one card!


Best

Klaus

bidgeeman
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Re: Image Rotation

Post by bidgeeman » Wed Sep 06, 2017 11:11 am

Hi Klaus. Yes. the imagage is on a separate card as per the script above but like I mentioned the set ImageData did not work. The image still shrank as it rotated.
Not sure what i did wrong?
Bidge

bidgeeman
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Re: Image Rotation

Post by bidgeeman » Wed Sep 06, 2017 11:17 am

I added the script to the image rotate slider and the image shrank away to nothing!!! :shock: :D

Code: Select all

set the imageData of image "i1" of stack "ImageArea" to the imageData of image "i1" of stack "ImageArea"
set the angle of image "i1" of stack "ImageArea" to pScrollValue 
Bidge

MaxV
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Re: Image Rotation

Post by MaxV » Wed Sep 06, 2017 11:52 am

Please see this video, you make something wrong: https://youtu.be/sSOPwx1YSFw
Livecode Wiki: http://livecode.wikia.com
My blog: https://livecode-blogger.blogspot.com
To post code use this: http://tinyurl.com/ogp6d5w

bidgeeman
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Location: Australia

Re: Image Rotation

Post by bidgeeman » Wed Sep 06, 2017 12:38 pm

Ahh MaxV...thank you that worked well. I see that you left the image unlocked. My image was being locked by the code I was using and was not allowing the image to resize itself. I have had to rebuild the code I had originally to accommodate this and it works well for image rotating now but my resizing slider does not retain the last size of the image when it is set by the slider as this was relying on locking the image to the new size. How can I get around this?

Code: Select all

on scrollBarDrag pvalue
   lock screen 
   put pValue/100 into sScale 
   set the width of img "i1" to the formattedWidth of img "i1"
   set the height of img "i1" to the formattedWidth of img "i1"
   set the lockloc of img "i1" to false 
   put the width of img "i1" into sWidth 
   put the height of img "i1"  into sHeight 
   set the width of img "i1"  to (sWidth * sScale) 
   set the height of img "i1"  to (sHeight * sScale) 
   set the visible of img "i1" to true
   unlock screen
end scrollBarDrag

EDIT: I have tried setting the locloc but it keeps reverting back as soon as the locloc is set back to false to allow the image to rotate.

Thanks again
Bidge

bidgeeman
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Location: Australia

Re: Image Rotation

Post by bidgeeman » Wed Sep 06, 2017 1:13 pm

Here is my stack.
The resize button will not work if the image has been rotated as well as the image will not retain it's size after being resized.
I don't know what is wrong.
Bidge
Attachments
RotateResize.zip
Rotate Resize problems
(10.62 KiB) Downloaded 22 times

Klaus
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Re: Image Rotation

Post by Klaus » Wed Sep 06, 2017 1:26 pm

Hi David,

use this script for the RESIZE scrollbar:

Code: Select all

on scrollBarDrag pvalue
   lock screen 
   
   ## Setting H and W also changes the LOC!
   put the loc of img "i1" into tLoc
   put pValue/100 into sScale 
 
   ## The engine knows these things! :-)
   set the width of img "i1" to round(the formattedWidth of img "i1" * sScale) 
   set the height of img "i1" to round(formattedHeight of img "i1" * sScale) 
 
   ## So it does not walk around on the card:
   set the loc of img "i1" to tLoc
   unlock screen
end scrollBarDrag
No need to reset to formattedwidth/height and to un-/lock the size -> loclock

Best

Klaus

bidgeeman
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Location: Australia

Re: Image Rotation

Post by bidgeeman » Wed Sep 06, 2017 1:30 pm

Hi Klaus.
That works fine but when I try to rotate the image with the rotate slider it pops back to it's original size?

EDIT: Sorry to be a pain but your code locks the image so that the rotation does not work. It's back to the original problem of the image resizing when it rotates. :(
Bidge

bogs
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Re: Image Rotation

Post by bogs » Wed Sep 06, 2017 1:52 pm

Well, one sure way I can think of is to reduce the size of the image through code to the size you need, lets say 300x200 (works best if all your images are the same size or aspect), then copy it to a temp. folder or variable or container at that size, then import the smaller image.

Alternately, create actual thumbnails of all your images, and load the thumbnail.
Image

[-hh]
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Re: Image Rotation

Post by [-hh] » Wed Sep 06, 2017 6:33 pm

As I already wrote a few posts above:
There is a stack "Angle and Resize an Image" (by Paul Hibbert) on "Sample Stacks" to that problem.
shiftLock happens

richmond62
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Re: Image Rotation

Post by richmond62 » Wed Sep 06, 2017 6:59 pm

This is going to sound really corny . . .

If and when I want images to rotate in Livecode, as anything but monochrome svg images screw up in a major way when rotated,
I make pre-rotated images in GIMP and import ALL of them (yeah, yeah, I know that causes an fairly 'expensive' overhead in terms
of hard-drive real-estate) and then call each one at a rotation point.

This guarantees the image comes out without fuzzy-wuzzy-do-dahs, parts of the image mission, resizing of the image and so on.

bogs
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Re: Image Rotation

Post by bogs » Wed Sep 06, 2017 7:26 pm

Why would that sound corny? It is a means to an end, I've used it myself in other languages than this one. Of course, I'll avoid bringing up any reference to some of the things I've done that I considered corny, c'est la guerre :twisted:
Image

Klaus
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Re: Image Rotation

Post by Klaus » Wed Sep 06, 2017 7:49 pm

Hi David,

please check the stack that Hermann mentioned a couple of times, you need the workaround described in that stack to make it work!
It just does not work as we exspect it to do! 8)

Here the direct link:
http://livecodeshare.runrev.com/stack/6 ... e-an-Image


Best

Klaus

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