[vtkusers] How to bypass parts of the VTK pipeline

[Elvis Stansvik]

Den 3 maj 2016 10:40 em skrev "Dan Lipsa" <dan.lipsa at kitware.com>:
>
> Seun,
> There is no flag that would remove the effects of a filter from the
pipeline. You'll have keep pointers to A and C and insert B in the pipeline
when needed and remove it when you don't.
> To execute the new pipeline you'll call vktRenderWindow::Render.

I guess you could subclass B and give it an easy switch function to turn it
into a noop filter.. But better/easier to just reconfigure the pipeline
like Dan suggests.

Elvis

>
>
>
> On Tue, May 3, 2016 at 4:28 PM, Seun Odutola <seun at rogue-research.com>
wrote:
>>
>>   Apologies for not being clear in my initial message, what I meant to
say was that A—>C does work. I was hoping to find out a way of having
A—>B—>C all connected but to suppress any effect of B when I don’t need it
thus working like (A—>C) and turn B’s effect back on when I need it. In
short, I have A(probe filter) —> B(ClipPolyData) —> C(PolyDataMapper) all
connected but since one won’t be clipping much in the application am
working with I want to keep the connection but just completely ignore B’s
effect when clipping isn’t being executed (which is most of the time during
normal operations) and vice versa turn it back on for just clipping.
>>
>>> On May 2, 2016, at 4:36 PM, Dan Lipsa <dan.lipsa at kitware.com> wrote:
>>>
>>> Seun,
>>> What you tried should work. Call SetInputConnection on C with the
output port of A and then call vktRenderWindow::Render.
>>> This should execute A->C
>>> Try setting a breakpoint on RequestUpdate for A, B and C to see what
gets called.
>>>
>>>
>>>
>>> On Mon, May 2, 2016 at 4:19 PM, Seun Odutola <seun at rogue-research.com>
wrote:
>>>>
>>>> Hello Everyone,
>>>>
>>>>         After researching & googling for answers to no avail, I was
wondering if someone here could help me regarding a situation am facing. To
keep things simple let’s say I have 3 nodes, A, B, C. A is a probeFilter, B
is a ClipPolyData and C is a PolyDataMapper. I currently have a pipeline
A—> B—>C and I would like to occasionally ignore B and thus have A—>C
directly, how do I achieve this. I have tried to connect directly A—> to C
which does nothing (unless am doing something wrong). Hoping someone could
point me in the right direction.
>>>>
>>>> Regards,
>>>>    Seun
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>>>
>>
>
>
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