On Pre Draw

[Justin_CN_Ruan]

[ FlexSim 22.1.4 ]

Hi Experts,

I have a question when I used the trigger "On Pre Draw" in the Shape object.

I saw that that trigger is used to define the logic like positioning obj prior to their draw, but I don't know what exactly the function is used for. I found out my question has a few docs that can help. So, any help or example would be valuable.

Thank you guys

[moehlmann_fe · Accepted solution]

As you say, it would mostly be used to implement movement that kinematics or animations are not suitable for. For example, just yesterday I used it in a model for this post to move an operator along with an item on a conveyor.

I also used in for the model in the video below. The trailer is rotated and translated based on the truck to achieve a realistic motion.

https://www.youtube.com/watch?v=7QY2AWj-ExY

The VR demo model uses a global OnPreDraw trigger to check if the hands are in the vicinity of interactable objects. The logic is thus coupled to the framerate.

[Jeanette_Fullmer]

Hi @Lamm, was Felix Möhlmann's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always comment back to reopen your question.