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Lars Jacobsen avatar image
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Lars Jacobsen asked Lars Jacobsen commented

No OnDraw trigger for most FlowItems - Why?

Why is there no OnDraw trigger available on most FlowItems? Is it by design or ?

FlexSim 20.2.1
flexsim 20.2.1flowitemsondraw
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1 Answer

Phil BoBo avatar image
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Phil BoBo answered Lars Jacobsen commented

Yes, this is by design. Having an OnDraw trigger on flowitems causes slow rendering performance.

By default, flowitems have DRAW_FLAG_NO_ON_DRAW toggled on their drawflags attribute to improve rendering performance.

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Lars Jacobsen avatar image Lars Jacobsen commented ·

OK...... @phil.bobo

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Allister Wilson avatar image Allister Wilson Lars Jacobsen commented ·

@lars_christian.j2 To expand a bit on Phil's answer, using that information you can add your own draw code to a flowitem if necessary.

In the attached (20.0) model, I

  • created a new flowitem: CustomDrawnBox
  • unset the DRAW_FLAG_NO_ON_DRAW flag
  • added an OnDraw attribute which includes a call to drawsphere

20200901_flowitem_custom_draw.fsm

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20200901-flowitem-custom-draw.fsm (23.3 KiB)
Lars Jacobsen avatar image Lars Jacobsen commented ·

Thanks @alistair.w

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