How: an adaptive chord with midpoint always drop 2% of the chord length

[heichan88]

Hello,

I need an adaptive  chord cable with its midpoints always drop down 5% of the cable length,

but tried many ways but unable to do that,

Please advice, thanks

 

[ToanDN · Accepted solution]

You don't drop the midpoint, but host another point on that midpoint and offset from host a distance equal 2% of the chord length.

[heichan88]

Hello ToanDN

now I :

setp (1) make a point B offset L/2 to start point adaptive A

step (2) make a point C offset L*0.05 to B

step (3) add adapitvc end point D with a reporting parameter L to A,

seems work --- is that correct? any other way?

Please advice thanks

 

 

 

[ToanDN · Accepted solution]

Try this family.  It was done exactly how I described earlier. I repeat the steps here:

- place 2 points, make then adaptive

- create a ref line thru the 2 points above

- place a dim between 2 points, associate the dim with a reporting instance parameter [L]

- place a ref point in the middle of the ref line, no need to add dimension or constrain, it stays in the middle of the ref line automatically (beauty of adaptive family)

- place another ref point using the midpoint as host, select the new point and change Offset from host to a arbitrary value from properties

- associate Offset from host with another instance parameter [h], enter = -(L/50) in the formula box of [h]

[heichan88]

OK that is much better, thanks