sketchup question
#21252
09/29/09 06:21 PM
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Mark Davidson
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If I have a curved surface, like the support timber in a small bridge, how can I put floor boards on the bridge that will follow the curved surface?
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Re: sketchup question
[Re: Mark Davidson]
#21254
09/29/09 07:05 PM
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bmike
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Is the curve a radius arc? I think I would try: Find the center point. Rotate the first board to sit on the surface. Rotate with the control key (copy rotate) about the center point to the opposite end. Before ending the command press the / key. Enter the number of planks it will take to fill in the curve. This might take some time and trial and error. Calculator for radius from an arc's width and height: http://www.handymath.com/cgi-bin/rad2.cgi?submit=EntryYou will also find it calculates the arc length, so you can do some math on your board width to calc the number of planks you will need.
Last edited by bmike; 09/29/09 07:14 PM.
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Re: sketchup question
[Re: bmike]
#21255
09/29/09 07:24 PM
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Mark Davidson
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yes the curve is a radius arc... 5 inches over 10 feet. how do I work out the size of circle here? does this mean I need a "handle" on the board that reaches to the center of the circle? OR, the other side of the circle... I'm thinking of something with the "follow me" tool, some way to select the path, then copy along it.
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Re: sketchup question
[Re: Mark Davidson]
#21256
09/29/09 07:32 PM
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Mark Davidson
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Ok, I found the center of the circle as follows: -copy the support timber, move 10 feet away and explode. -explode the curve -using the line tool, find the midpoint of a section of the curve, and draw the line toward the center of the circle, then repeat this from another section of the circle. the point where these two lines cross is the center, and your calculator agrees with the figure(30ft 2 5/16in) unless the board is perfectly lined up, this process is not accurate... I know I've seen this done on Youtube somewhere.
Last edited by Mark Davidson; 09/29/09 07:36 PM.
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Re: sketchup question
[Re: Mark Davidson]
#21257
09/29/09 07:40 PM
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Joined: Jan 2008
Posts: 918
bmike
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try setting the board / plank on the very center of the arc in a horizontal orientation, at the midpoint of the bridge, then rotate / copy to the one side X number of times... should give you better accuracy that trying to manually align the end board and rotate / copy around.
copy these and inverse scale them and move them back to the other side of the bridge.
i'm sure there is an automated script out there for this.
Last edited by bmike; 09/29/09 07:42 PM.
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Re: sketchup question
[Re: bmike]
#21258
09/29/09 07:54 PM
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Mark Davidson
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gotcha, that works with accuracy
Last edited by Mark Davidson; 09/29/09 07:58 PM.
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Re: sketchup question
[Re: Mark Davidson]
#21260
09/30/09 02:05 AM
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bmike
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nice.
yes, the trick with sketchup is often figuring how to use geometry and repetition to get what you want.
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Re: sketchup question
[Re: daiku]
#23435
04/23/10 02:27 PM
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Mark Davidson
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Re: sketchup question
[Re: Mark Davidson]
#23436
04/23/10 03:28 PM
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bmike
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nice! i think you need to post a sketchup image at similar perspective...
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