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toggle entry layer fillstyle between fill and stipple

I'd like to use the drSetPacket( function to control the fillstyle of the active entry layer, toggling between fill and stipple fillstyles.

The problem is preserving all the other parameters for the layer in the drSetPacket command. Unless there is a better way of controlling entry layer fillstyle, how many hurdles must be hopped?

Somehow need to get the packet id of the entry layer, then get the packet parameters, analyze the fillstyle and toggle it in the drSetPacket command.

Dave in Oregon

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Andrew Beckett over 3 years ago

Hi Dave,

Maybe this: Toggle the fill for any layer on the fly will give you some hints? I think you'd probably do something like:

current=drGetPacket("display" "myPacket")
setf(caddr(current) "newStipple")
apply('drSetPacket current)

where myPacket and newStipple are what you want. You might need to store the old stipple somewhere to restore it back latter, but something like that would work.

Andrew
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dfink over 3 years ago in reply to Andrew Beckett

Thanks very much for your help Andrew Beckett!

I'm finding the nth(index list) function easier to use than caddr with setf but otherwise all your suggestions have helped me through this thorny area!

Regards, Dave Fink
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dfink over 3 years ago in reply to Andrew Beckett

Thanks very much for your help Andrew Beckett!

I'm finding the nth(index list) function easier to use than caddr with setf but otherwise all your suggestions have helped me through this thorny area!

Regards, Dave Fink
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