visualpython-users

[Visualpython-users] simplest way to determine if mouseclick is in the corner of a box ?

[Stef M. <s.m...@ru...>]

hello,

probably another simple question (for those who are  known with vector 
algebra),
how do I determine if I click in the corner region of a box or somewhere 
on the middle.

the idea is that dragging,
-  should rotate the box if the start drag is in the corner
-  should move the object is hit some where in the middle

thanks,
Stef Mientki

Re: [Visualpython-users] simplest way to determine if mouseclick is in the corner of a box ?

[Bruce S. <Bru...@nc...>]

The general case is complicated, but it might not be too difficult in a 
particular situation. From the documentation on mouse events:

ray A unit vector pointing from camera in the direction of the mouse 
cursor. The points under the mouse cursor are exactly { camera + t*ray 
for t>0}.

Also note the project() function for projecting the mouse position onto 
a given plane.

I'm afraid that it's up to you to use these tools; your question is not 
a simple one.

Bruce Sherwood

Stef Mientki wrote:
> hello,
> 
> probably another simple question (for those who are  known with vector 
> algebra),
> how do I determine if I click in the corner region of a box or somewhere 
> on the middle.
> 
> the idea is that dragging,
> -  should rotate the box if the start drag is in the corner
> -  should move the object is hit some where in the middle
> 
> thanks,
> Stef Mientki

Re: [Visualpython-users] simplest way to determine if mouseclick is in the corner of a box ?

[Stef M. <s.m...@ru...>]

thanks Bruce,

Bruce Sherwood wrote:
> The general case is complicated, but it might not be too difficult in 
> a particular situation. From the documentation on mouse events:
>
> ray A unit vector pointing from camera in the direction of the mouse 
> cursor. The points under the mouse cursor are exactly { camera + t*ray 
> for t>0}.
>
> Also note the project() function for projecting the mouse position 
> onto a given plane.
>
> I'm afraid that it's up to you to use these tools; your question is 
> not a simple one.
Well the question was simple, but the solution isn't ;-)
I think for the moment (and maybe forever) I'm going to use 
alt/ctrl/shift to differentiate between actions.
cheers,
Stef

>
> Bruce Sherwood
>
> Stef Mientki wrote:
>> hello,
>>
>> probably another simple question (for those who are  known with 
>> vector algebra),
>> how do I determine if I click in the corner region of a box or 
>> somewhere on the middle.
>>
>> the idea is that dragging,
>> -  should rotate the box if the start drag is in the corner
>> -  should move the object is hit some where in the middle
>>
>> thanks,
>> Stef Mientki
>
>


Het UMC St Radboud staat geregistreerd bij de Kamer van Koophandel in het handelsregister onder nummer 41055629.
The Radboud University Nijmegen Medical Centre is listed in the Commercial Register of the Chamber of Commerce under file number 41055629.

Re: [Visualpython-users] simplest way to determine if mouseclick is in the corner of a box ?

[Scott D. D. <Sco...@Ac...>]

Stef Mientki wrote:
> Bruce Sherwood wrote:
>> ... ray A unit vector pointing from camera in the direction of the mouse 
>> cursor. The points under the mouse cursor are exactly { camera + t*ray 
>> for t>0}.
>> Also note the project() function for projecting the mouse position 
>> onto a given plane....
> Well the question was simple, but the solution isn't ;-)
> I think for the moment (and maybe forever) I'm going to use 
> alt/ctrl/shift to differentiate between actions.

Note that a box has 6 planes (at most three visible), so you could
project onto each plane, determine if the point is on-box, and choose
the "closest" of the on-box points.

--Scott David Daniels
Sco...@Ac...

Re: [Visualpython-users] simplest way to determine if mouseclick is in the corner of a box ?

[Anders P. <an...@gm...>]

Alternatively you can put smaller objects at the corners of the box and
maintain their positions as the box is moved or resized.
Clicking/dragging these objects would mean to perform one action while
clicking the box can do something else.
This has the additional benefit of showing the user graphically where to
click for different effects.
The main downside is the increased complexity.

Any comments on this general solution?
/Anders

On Fri, Dec 5, 2008 at 12:48 PM, Stef Mientki <s.m...@ru...> wrote:
>
>> thanks Bruce,
>>
>> Bruce Sherwood wrote:
>> > The general case is complicated, but it might not be too difficult in
>> > a particular situation. From the documentation on mouse events:
>> >
>> > ray A unit vector pointing from camera in the direction of the mouse
>> > cursor. The points under the mouse cursor are exactly { camera + t*ray
>> > for t>0}.
>> >
>> > Also note the project() function for projecting the mouse position
>> > onto a given plane.
>> >
>> > I'm afraid that it's up to you to use these tools; your question is
>> > not a simple one.
>> Well the question was simple, but the solution isn't ;-)
>> I think for the moment (and maybe forever) I'm going to use
>> alt/ctrl/shift to differentiate between actions.
>> cheers,
>> Stef
>>
>> >
>> > Bruce Sherwood
>> >
>> > Stef Mientki wrote:
>> >> hello,
>> >>
>> >> probably another simple question (for those who are  known with
>> >> vector algebra),
>> >> how do I determine if I click in the corner region of a box or
>> >> somewhere on the middle.
>> >>
>> >> the idea is that dragging,
>> >> -  should rotate the box if the start drag is in the corner
>> >> -  should move the object is hit some where in the middle
>> >>
>> >> thanks,
>> >> Stef Mientki
>> >
>> >
>>
>>
>>