Follow object and rotate view by using script

Question

question

Steven Chen asked Dec 18 2019 at 9:01 AM Matthew Gillespie answered Dec 18 2019 at 4:51 PM

Follow object and rotate view by using script

Hello,

I want to have camera follow a specific item on using video recorder. Since item doesn't exists before start model. I can't do this from context menu. So plan is writing a script in trigger to follow the item.

Another question is it possible to rotate view with given speed and degree when following an object?

Software Version:

FlexSim 19.2.4

video recorder follow objects viewpoint

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Answer 1 · 2019-12-18T15:00:07Z

Brandon Peterson answered Dec 18 2019 at 3:00 PM Brandon Peterson commented Dec 18 2019 at 4:24 PM

Steven,

During your model run you can use a trigger to set the node ">viewsettings/followobject" on the view to the object you want to follow. For example, you could set the node to the 100th item to enter a processor. The view would then follow the item through the model. If you use the OnDraw trigger of an object to do this then you will have a pointer to the view by default so you wont have to make adjustments every time you close an open views. The down side is that it will do it for all the 3D views that are open.

There is not a direct way to rotate the view with a given speed and degree when following an object that I know of. There are a few pointers I can offer for doing it yourself. First, do it in a PreDraw trigger or the view will not rotate smoothly. Second, you'll want to uncheck the "Rotate with Object" option if you are using the default follow object in the view.

I hope this helps, Brandon

· 3

Joerg Vogel commented · Dec 18 2019 at 3:11 PM

@steven.chen, @Brandon Peterson, If you add an object on top of the item you follow through your model and you let this object rotate by a kinematic. Then I would follow the object on Top and not the item to get the desired rotation.

1 ·

Brandon Peterson ♦ Joerg Vogel commented · Dec 18 2019 at 3:13 PM

@Jörg Vogel That's a slick idea, Thanks!

1 ·

Brandon Peterson ♦ commented · Dec 18 2019 at 4:24 PM

Steven,

I didn't include this model with the original post because I had to get some help updating it from version 4.3.2! There is an object in the model called "ViewControl" that has some code in the "OnPreDraw" trigger that may be helpful for you. Basically, this model was a manual way of doing what the follow object option does for you now. Because it was built in such an old version the code may be a little out of date but it still works.

Good Luck, Brandon

view-follow-v19-2-4-mv-1.fsm

0 ·

view-follow-v19-2-4-mv-1.fsm (190.4 KiB)

Answer 2 · 2019-12-18T16:51:51Z

Matthew Gillespie answered Dec 18 2019 at 4:51 PM

These previous answers give you the code snippets you need to dynamically follow an object during the model run:

https://answers.flexsim.com/questions/45622/ser-view-on-video-recorder-as-first-person-from-op.html

https://answers.flexsim.com/questions/69086/how-do-you-get-a-reference-to-the-3d-model-view.html

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