Unwanted 'Pulsing' when Changing an Image's Angle

[Ray]

Alejandro,

Between you and Terry I've eliminated the unwanted pulsing as long as 
the image's size doesn't change.  However, there's a conflict in that 
setting the lockLoc to false which also (for some reason) disallows the 
changing of the image's size.

So, if I want my spinning beach ball to also 'come out at you' like 
starting the spin at 10% of it's original width and height and ending up 
at 100%, then I've still got problems.

My temporary solution is to simply stick with either 0, 90, 180, or 270 
for the angles I set but it makes for a rough looking spin.

Do you think Jim Hurley's solution, below, holds the promise of 
resolving the issue of rotating and changing size simultaneously?

Thanks,

Ray Horsley
LinkIt! Software

On 9/16/2014 9:49 PM, Alejandro Tejada wrote:
> Randy Hengst wrote
>> I don't know how to totally get rid of the wobble …
>> it seems like there is always a bit one one…
>> but I've seen the pulsing effect when
>> rotating an image with lockLoc set to true.
> Yes, lockLoc produces this effect in
> a rotating image. :(
>
> Check if this handler posted by Jim Hurley
> could help in your project:
>
> On Jan 08, 2012, jim hurley posted
> The script below will allow you to rotate an image about any predefined
> point.
>
> Create a button.
> Create an image.
> Place the button at any point relative to the image. (Perhaps use a grab me
> in a mousedown handler.)
> Click the button.
> The image will rotate about the center of the button.
> (For your application you would replace the center of rotation with the
> center of mass.)
>
>
> on mouseUp
>     set the angle of img 1 to 0
>     put the loc of me into myLoc
>
>     --Set the coor of the rotation Pt
>     put item 1 of myLoc into x0
>     put item 2 of myLoc into y0
>     
>     --Get the loc of the image
>     put the loc of img 1 into tLoc
>     put item 1 of tLoc into xC
>     put item 2 of tLoc into yC
>
>     --Get the distance between the roation pt and the image center
>     put sqrt ( (xC - x0 )^2 + (yC - y0)^2 )  into L
>
>      --Get the angle of the line from the rotation center to the image center
>     put atan2(yC-y0, xC-x0) *180/pi into phi0
>
>     put 0 into tAngle
>
>     repeat 360 times
>        lock screen
>        set the angle of img 1 to -tAngle
>        put phi0 + tAngle into phi
>        set the loc of img 1 to (x0 + L * cos(phi*pi/180)), (y0 + L *
> sin(phi*pi/180))
>        unlock screen
>
>        add 1 to tAngle
>        wait 10 millisec --or whatever
>     end repeat
> end mouseUp
>
> on mouseDown
>     grab me --So that you can relocate the rotation center.
> end mouseDown
>
>  From this thread:
> http://runtime-revolution.278305.n4.nabble.com/Rotate-around-Center-of-Mass-td4273701.html
>
>
>
>
> --
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>
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