Divide a curve into equal x axis segments

[Anonymous]

Hi All,

I will like to measure a spline into using equal spaced divisions based on a ruler  located  on the x axis. 

Measure and divide command space equal along the spline only. see image. The top is using measure command. but I actually like to achieve the bottom effect. Is there a way this can be achieved on any curve?

Thanks

[imadHabash]

Hi,

>> Divide a curve into equal x axis segments <<

as i understand that you want to get equal horizontal ( x ) spaces from equal divided curved spline .... i doubt that it could be !! 

Regards,

[Anonymous]

That will be two conflicting task. The divisions along spline cannot be equal.

[Kent1Cooper]

That can certainly be done with an AutoLisp routine.  It would be a matter of stepping along the X increments, drawing a temporary vertical Line at each location, finding where it [virtually if not actually] intersects the Spline using the (intersectwith) method, and drawing a Point on the Spline there.

Tell us more about initial conditions and steps.  Is there a Line drawn horizontally at the bottom already?  Do you want that Line and the vertical ones left in the drawing in the end, or are they only temporary for determining the locations of the Points?  Is it to be more like Divide or Measure in the spacing in the X direction?  Is that to be calculated from that base line [if it exists], or specified by the User?  Etc., etc.

[leeminardi]

1. Extend the red lines so that they go past the spline.
2. Make a copy of the spline and the red lines a known distance away from the original.
3. Give the trim command and select all the vertical red lines in the original and the copy.
4. Hit Enter and then click on the 1st, 3rd, 5th,... segments of the original spline as well as the 2nd, 4th, 6th,... segments of the copy of the spline.
5. Move the spline segments from the copy back to their original position.

[Anonymous]

Sorry I am using AutoCad LT 2014

[Kent1Cooper]

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@Anonymous wrote:

Sorry I am using AutoCad LT 2014

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Than you'll probably have to draw a vertical Line and Array it or something, and manually place the Points where each one intersects the Spline [as I imagine you did for the second image].  I don't think there's any way to get that result any more directly with ordinary AutoCAD commands, so without AutoLisp capability you're stuck.

[It's always a good idea to indicate that you're using LT when posting a question, since in so many cases it has such an affect on the solutions people can suggest.]

[ChicagoLooper]

If you would like to "measure a spline into using equal spaced divisions based on a ruler  located  on the x axis" then you are technically not measuring the  spline. You are actually dividing that portion of the x-axis directly below the curve, or mathematically (X2-X1) / 14 = Y. Where Y= the distance that will provide 14 equally spaced sections under the curve when measured along the x-axis.

Since your parameter requires the spacing to be equal when placing a ruler on the x-axis, using the 'DIVIDE' or 'MEASURE' command on the curve will give erroneous results because the slope of the curve varies from section to section. If we use geometric principles and apply the Pythagorem theorem (where A² + B² = C²) you are only interested in the x-component of each section and don't care about the y-component.

There are many ways you can accomplish this in Cad. Using SCALE and OFFSET commands is just one way.

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[Anonymous]

I will attempt using scale and offset as suggested by ChicagoLooper

when I return to work tomorrow. If it works I will post the solution.

Thanks