Use of tunnels vs. shift register for queue ID

[Jason_S]

There is one advantage of the shift register over the tunnel. If the loop has the possibility of running zero times, the shift register will pass the input value directly to the output value. If you wire the refnum into the loop via a tunnel, and then back out via a tunnel, the output tunnel will be uninitialized if the loop executes zero times. This is good to keep in mind if you are, for instance, performing one operation on the queue before the loop, performing N operations in the loop, and then performing several after the loop. It spares one from having to wire around the loop for the purpose of handling the zero iteration case.

Jason

[tbob]

Here is a picture of my example:

Message Edited by tbob on 03-23-200602:33 PM

[shoneill]

Thanks tbob,

Having just started work and suffering from caffiene drawback, I just had an idea.  I know experience tells me that such ideas should be kept in a dark place and preferably buried within a strong metal box, but anyway.....

How about a 3D-view of the objects on the block diagram to enable us to look "under" structures to see what's hiding there?  Or maybe just layers which we can then scroll through.  Man, just think of the mess we could produce with something like that!

You *were* warned.

Shane.

[Ben]

Hi Shane,

You wrote,

"

How about a 3D-view of the objects on the block diagram to enable us to look "under" structures to see what's hiding there?  Or maybe just layers which we can then scroll through.  Man, just think of the mess we could produce with something like that!
"

NI already has a patent on the 3D LabVIEW block diagram.

The link I have for that discussion is now invalid because of the Exchange update.

Maybe Molly can find it.

Ben

[TiTou]

Hi Shane, Hi Ben,

The idea of 3D view on a diagram should not be rejected without thinking/discussing a little bit more about it... Of course that would let developers draw huge "gaz turbines"* but scroll bars on the diagram also allow to draw 10-square-screen diagrams...
That comes back to the point of having rules and only break them under strict/well-known conditions.

There is, I think, potential wise uses for 3D view... they just have to be defined, no ?



* french expression 😉 "une usine à gaz" (litteraly : "a gaz factory")

Message Edité par TiTou le 03-24-2006 02:54 PM

[Kevin_Price]

There certainly are precedents to the basic idea.  CAD for mechanical design has handled the idea of visible vs. hidden lines for decades.  I suspect there are similar viewing options for electrical layouts of multi-layer boards.

Hidden wires could be dotted and/or partially transparent.  Not directly selectable unless clicking on a visible portion.   Hmmmm...   I kinda like it!   But oh! the mess we could make!

-Kevin P.

[tbob]

Here is yet another template for queued state machines.  By having two separate error threads, the code isn't intefered by the queue wires.  No local variables, and the queue reference can be propagated across all state cases.

Message Edited by tbob on 03-24-200612:33 PM

[Ben]

JPD found what I was after.

http://messages.info-labview.org/2000/07/27/20.html

3D LabVIEW.

Ben

[JeanPierre]

You mean something like this?

Message Edité par JeanPierre le 03-25-200609:35 PM

[Ben]

Anyone know where you can buy 3d glasses these days?

I was imagining something a little different. I was thinking a network fo icon faced cubes floating in 3-space connected via wires.

If I find time, I'll post an example.

Ben