Adventures in Rotation

[Mark Smith]

While I agree that it would be handy if the engine could accept non- 
integers for graphic points, a simple function to round a list of  
4000 or so points to integers took 34 milliseconds on my 1.5Ghz PB  
G4...hardly onerous in either execution time or coding effort.

Cheers,

Mark



On 5 Dec 2005, at 02:07, Jim Hurley wrote:

>> Message: 7
>> Date: Sun, 4 Dec 2005 19:16:29 -0500
>> From: "Bill Marriott" <wjm at wjm.org>
>> Subject: Adventures in Rotation
>> To: use-revolution at lists.runrev.com
>> Message-ID: <dn00sr$sch$1 at sea.gmane.org>
>>
>> #13) General flakiness. I would definitely say revCrumplePoly is a  
>> better
>> name for the revRotatePoly command. Is there any situation where
>> revRotatePoly could be useful? Not if it does this. Totally  
>> bugged. (I
>> suspect the reason why is that Rev doesn't have fractional  
>> coordinates?
>> Could such a limitation really result in such dramatic distortion?  
>> If this
>> is the case, then Rev should store fractionals, but render to  
>> integers.)
>
>
> Here, here. I have been promoting fractional coordinates for  
> graphic points for some time. Try the following handler:
>
> on mouseUp
>   set the loc of me to 200.6,200.4
>   put the loc of me into msg box--reveals 200,200
>
>   set the points of grc 1 to 100,100 & cr & 200.4,200.6
>   --There is no evidence of the line graphic
>   -- The fractional point is not truncated but interpreted as a  
> blank line.
> end mouseUp
>
> RR will accept fractional coordinates for controls (it truncates  
> the coordinates) but it will not accept fractional graphic points.
>
> You don't get an error message and no feedback that the problem  
> lines in the fractional coordinates.
>
> Problems arises when the graphic points are computed; the  
> programmer may  not realize that the points are fractional or that  
> RR will not accept  fractional points. Any point with a fractional  
> coordinate is interpreted as an empty point and therefore a  
> discontinuity.
>
> It has been a while and I forget the details, but I think there was  
> support for this change in RR; so far no implementation.
>
> Jim
>
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