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Help with 3DPlot
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joefromhersey 
Newbie 
Joined: 22.Jun.2012 Location: United States Using: Inventor2012 Status: Offline Points: 1 |
 Topic: Help with 3DPlotPosted: 24.Jun.2012 at 02:37 |
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Hi I am pretty new to AutoCad and need some help plotting 3D surfaces from mathematical functions. I downloaded the 3DPlot utility and followed the instructions from this site: http://www.cadstudio.cz/en/apps/3dplot/.
I defined a shape myFunc using: (defun myFunc (x y) (list x y (cos(x)+cos(y)))) However when I try to plot using: (3DPlot myFunc -1.0 1.0 0.1 -1.0 1.0 0.1) I get this error: error: bad function: -1.0 What am I doing wrong? Also would it be possible for me to get repeating units of the function cos(x)+cos(y)? |
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Vladimir Michl
Moderator Group 
Arkance Systems CZ Joined: 26.Jul.2007 Location: Czech Republic Using: Autodesk software Status: Offline Points: 2144 |
Posted: 17.Jul.2012 at 09:36 |
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Hi, your function definition is not properly formated in AutoLISP syntax. Assuming you want to draw Z = cos(x) + sin(x), the proper syntax is:
This will draw a part of a 3D sphere.
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Vladimir Michl (moderator)
ARKANCE - https://arkance.world - Autodesk Platinum Partner |
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