Problem with follow me

deaneau

Hi at all,
ill try to use the follow me tool with an elypsoid and a spline.

the orientation of the elypsoid at the start is ok, however at the end this will be rotated
what can i do to solve this problem?

stair.skp

numbthumb

Maybe this? http://forums.sketchucation.com/viewtopic.php?t=16465

jeff hammond

this isn't the typical twisting problem inherent with SU follow-me..
i'd say this is more about unpractical design.. if it were a circle you were trying to extrude, it would work out ok. the ellipse shape though needs to be more thought out as to what happens at the joints..

if this were actually being built, it might be best to do something like this (which can be done with normal follow-me)

stairs__.skp

screen 3.jpg

deaneau

hi jeff, i have now solved this in my model with your help. what the minimum for the bend "extension"?

thank you for your help.

dean

@unknownuser said:

this isn't the typical twisting problem inherent with SU follow-me..
i'd say this is more about unpractical design.. if it were a circle you were trying to extrude, it would work out ok. the ellipse shape though needs to be more thought out as to what happens at the joints..

if this were actually being built, it might be best to do something like this (which can be done with normal follow-me)

[attachment=1:vz3dri1n]stairs__.skp[/attachment:vz3dri1n]

[attachment=0:vz3dri1n]screen 3.jpg[/attachment:vz3dri1n]

jeff hammond

@deaneau said:

hi jeff, i have now solved this in my model with your help. what the minimum for the bend "extension"?

thank you for your help.

dean

if i understand your question correctly (as in what's the min. length for this to extrude properly... and not - what's the min length as required by some building code)

...then the min.length would need to be 1/2 the width of the ellipse.
but be aware, in the drawing you posted, the ellipse was a little wacky and not symmetrical (the segment defining the right side is not vertical).. either copy/paste the ellipse in my drawing, redo yours, or just make sure you're measuring to total actual width)

deaneau

good morning.
wow, you have good eyes.
yes you understand right. i have not find the right words.

dean

@unknownuser said:

@deaneau said:

hi jeff, i have now solved this in my model with your help. what the minimum for the bend "extension"?

thank you for your help.

dean

if i understand your question correctly (as in what's the min. length for this to extrude properly... and not - what's the min length as required by some building code)

...then the min.length would need to be 1/2 the width of the ellipse.
but be aware, in the drawing you posted, the ellipse was a little wacky and not symmetrical (the segment defining the right side is not vertical).. either copy/paste the ellipse in my drawing, redo yours, or just make sure you're measuring to total actual width)

TIG

Also remember that Sketchup/OpenGL doesn't like to make tiny faces <0.1mm or so, so FollowMe and similar tools can fail at these sizes. If you Scale up by 10 do the 'small faces' and Scale down by 0.1 it should make and remain OK afterwards - it's the 'making' not the 'existing' that's the bottom size limit.

deaneau

thank you TIG for your info.
dean

@tig said:

Also remember that Sketchup/OpenGL doesn't like to make tiny faces <0.1mm or so, so FollowMe and similar tools can fail at these sizes. If you Scale up by 10 do the 'small faces' and Scale down by 0.1 it should make and remain OK afterwards - it's the 'making' not the 'existing' that's the bottom size limit.