Re: [openvrml-develop] Vector Assignment

[cheribhai <cha...@gm...>]

Hello Braden,
                  The problem seems to be occurring when the field of an
external node is changed in a script node. I have attached an example where
I try to toggle between the  binding of two viewpoints from a script. The
bind values remain unchanged when using simple assignment.

Cheers - Cherian

http://old.nabble.com/file/p28003831/jsassign.wrl jsassign.wrl 


Braden McDaniel wrote:
> 
> On Mon, 2010-03-01 at 04:40 -0800, cheribhai wrote: 
>> 
>> Hello,
>>        A quick question on vector asssignment using openvrml. I have a
>> javascript function where I am dynamically changing the key values of a
>> position interpolator, but the assignment does not seem to work.
>> I have tried 
>>   PosInter.keyValue[1][0] = targetPosition[0]; // x
>>   PosInter.keyValue[1][0] = targetPosition[1]; // y
>                          ^
>                          a typo, presumably.  :-)
> 
>>   PosInter.keyValue[1][2] = targetPosition[2]; // z
> 
> First off, you need to be using directOutput TRUE in order to set the
> node field like this.
> 
> But assuming you've done that, I think this still doesn't work because
> you end up setting the elements of a temporary SFVec3f that keyValue[1]
> returns.  I think there's an argument to be made that this syntax should
> work; but I haven't found a good way to do that with SpiderMonkey.
> 
> It should work to set the entire SFVec3f element at once:
> 
>         PosInter.keyValue[1] = targetPosition;
> 
>> and also 
>> 
>>   PosInter.keyValue = [0 0 0,  targetPosition[0] targetPosition[1]
>> targetPosition[2]]; 
>> 
>> but both don't work.
> 
> MF* types are not JavaScript arrays; so I wouldn't expect that to work.
> 
> -- 
> Braden McDaniel <br...@en...>
> 
> 
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