3d picture control redraw expensive?

[LarsM]

Hi all!

I have a VI with a 3D picture control. This control is updated and set to redraw 10 times per second. The redraw method is called by:

The reference to the control is stored as a generic control reference, then casted to 3D picture control and lastly Redraw is called.

It seems that manual redraw calls are a bit expensive. With the redraw call, CPU usage hovers around 6 %. However, if I disable redraw and instead update the display by rotating the scene, then CPU usage drops to one percent.

Before I delve further, does anybody have any experience with this?

Regards

[Intaris]

Any reason why you're calling a manual redraw at all?

[LarsM]

At the moment, the scene contains a football field, with a ball bouncing around. The ball position is updated 10 times per second. If I don't call redraw, nothing happens.

[Intaris]

Try changing it from a control to an indicator.

I've done 3D animations like this before and to be hionest, I haven'0t had your problem at all.

[Intaris · Accepted solution]

Ah, I just double checked my code and saw that I also had a redraw node in there, but I wasn't using a control refnum.  My invoke node was tied ditrectly to the 3D graph and I have no refresh rate problems.

Also check that your graphics drivers are up to date.

Which version of LV are you using?

[LarsM]

I'm using LV 2012. But now that you mention it, the invoke node is strict, so it should be faster. I will make a test.

[LarsM]

Yep, the strict call is better.

[Intaris]

Well then that's an interesting thing to know.

I was previously unaware of that.