Path Mapper ?

Replies to This Discussion

Permalink Reply by Victor Leung on December 24, 2010 at 9:39am

Perhaps you should more clearly explain what you want to do. What is your input, how you want to manipulate the input etc.

 

More specific.

Permalink Reply by to] on December 24, 2010 at 10:00am

Hi Greg

you should be more precise and add screen-captures of your def

but take a look on this definition

Permalink Reply by Victor Leung on December 24, 2010 at 10:11am

Hi to],

I dont know how to write those lexical operation well, is there a guide for that?

For example, in your {A;floor(i/10)} 

Is the programme going through each i during the assign, and calculate the path that is based on floor(i/10) and then map it to the new path?

 

This is elegant.

Permalink Reply by to] on December 24, 2010 at 10:16am

Hi Victor

just right click on the pathmapper component and read the help David supports

floor and ceiling are programming functions

floor = round down

ceiling = round up

in my example is i the count of the items of path {A;B}

so 870/10 = 87

so it creates 87 paths with 10 items

 

best to]

 

Permalink Reply by Greg J on December 24, 2010 at 10:29am

Victor Leung,

This post was a big help in understanding Path Mapper,

http://www.grasshopper3d.com/forum/topics/path-mapper-component-what

Permalink Reply by Greg J on December 24, 2010 at 10:24am

Sorry, thanks for the help.

I've read a file that contains a point cloud from my CNC/Digitizer.  I would like to make a surface from these points.  when I connect the points, the IntCrv command makes a continous curve, so I can't loft a surface.  I tried to divide the curve, but the points are not evenly divided. There are 878 pts and 1 curve (1 path, 878 items).  So, I would like to seperate the curve to loft a surface. 

 

I hope that is clearer.  Thanks again.

 

Permalink Reply by Victor Leung on December 24, 2010 at 10:30am

I'm not pro on that, 

 

my gut feeling is that if your points are scanned in a spiral manner (which appears to be in the result from InterpolateLine) , than you probably have to restructure your points into rolls (like a grid), then to do interpolate curve on the points in each roll. This depends on your input.

 

See if sort point works for you, I doubt, but worth a try.

 

See also if using a point cloud plug-in would help, despite I never used one :(

Permalink Reply by Greg J on December 24, 2010 at 10:49am

Thanks Victor,

I'm trying to sort the pts right now.  Yes, they are in a spiral pattern.  My digitizing program will only scan in this manner.

 

There are plenty of point cloud programs on the market, but I know GH will do it.  Plus I don't want to spend the money for a point cloud program right now($400).  If I spend much more time on GH, then it'll be more cost effective to just buy the point cloud program.

Permalink Reply by Greg J on December 24, 2010 at 10:32am

to],

Your def does what I was trying to do. 

Thank you and have a Merry Christmas.  Actually, Merry Christmas and Happy Holiday to all.