Rotating Polygons

BNig niggemann at uni-wh.de
Wed Sep 30 18:05:59 EDT 2009




Richmond Mathewson-2 wrote:
> 
> BNig wrote:
>> Richmond,
>>
>> you might want to try to put 
>>
>> on scrollbarddrag scrollbarDragValue
>> revRotatePoly the long ID of grc "SQUIGGLE", scrollbarDragValue
>> end scrollbardrag
>>
>> into a scrollbar and scroll a couple of times from 0 to 360 and back.
>>
>> Robert is up to a stable rotate
>>
>> regards
>> Bernd
>>
>>
>>   
> Presumably what you mean by "a stable rotate" is that the polygon does 
> not get distorted
> as it rotates.
> 
> This:
> 
> on mouseUp
>    repeat for 360 times
>       revRotatePoly the long ID of grc "gXXX", 1
>    end repeat
> end mouseUp
> 
> ends up making the graphic unrecognisable.
> 
> I tried this:
> 
> on mouseUp
>    set the moveSpeed to 65000
>    repeat for 360 times
>       revRotatePoly the long ID of grc "gXXX", 1
>       set the lockScreen to true
>       set the width of grc "gXXX" to 300
>       set the height of grc "gXXX" to 300
>       move grc "gXXX" to 300,300
>       set the lockScreen to false
>    end repeat
> end mouseUp
> 
> and the effect is really horrible insofar as the polygon gets badly 
> transformed.
>>
>> Richmond Mathewson-2 wrote:
>>   
>>> I just have been reading Robert Cailliau's page:
>>>
>>>
>>> Cailliau claims:
>>>
>>> "Unlike images, polygons cannot be directly rotated in Revolution.  They 
>>> have no "angle" property."
>>>
>>> http://www.robertcailliau.eu/Programming/Revolution/Tutorials/PolygonRotation/zPolygonRotation.html
>>>
>>> the second part of which is plain WRONG; one can set the ANGLE of an 
>>> irregular polygon, it just doesn't
>>> have any affect.
>>>
>>> HOWEVER, the Documentation explicitly details  revRotatePoly:
>>>
>>> on mouseUp
>>>    revRotatePoly the long ID of grc "SQUIGGLE", 60
>>> end mouseUp
>>>
>>> which is a lot simpler than getting misled by Cailliau's stuff about 
>>> having to use all sorts of complicated
>>> custom properties.
>>>
>>>     
> It would make things a lot simpler if Cailliau explicitly stated what he 
> meant by "rotate".
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