[vtkusers] rescaling glyphs.??

[David Gobbi]

No, no... I mean the positions of each of the glyphs, not the position
of the glyphActor.


On Tue, Feb 9, 2010 at 7:01 AM, Rakesh Patil <rakeshthp at in.com> wrote:
> oh ok... Objects position in my case is same as glyphActor->GetPosition()
> right??
> I'm asking this because it is returning position as zero...
>
> Thanks
>
>
> ---------- Original message ----------
> From:David Gobbi< david.gobbi at gmail.com >
> Date: 09 Feb 10 19:05:11
> Subject: Re: rescaling glyphs.??
> To: Rakesh Patil
>
> Let camera position be p1, which you can get from camera->GetPosition().
>
> Let object position be p2, i.e. the position of a glyph.
>
> The vector "v" is the p2 - p1:
> v[0] = p2[0] - p1[0];
> v[1] = p2[1] - p1[1];
> v[2] = p2[2] - p1[2];
>
> That's all there is to it.
>
>
>
>
> On Tue, Feb 9, 2010 at 6:24 AM, Rakesh Patil wrote:
>> Hello sir,
>>
>> Thanks a lot for you guidance. Please pardon me if am going wrong at any
>> point.
>> I'm am still not clear with this point what you said
>>
>> "The depth is the dot pro duct of the camera's direction-of-projection
>> with
>> the vector from the camera's position to the object's position."
>>
>> what exactly is a vector from the camera's position to object's position??
>>
>> Thanks
>