splines&lines intersections ?

hi there ! newbie, glad to be here.

i have no specific experience in macros&automation in autocad, but im very interesting to learn about it.

so, here is my little 2-d problem :

i have a grid constisted by lines and some curves in spline entity.

i need to extract in some way the coordinates of the intersections between the splines and the grid !!

the way i follow until now, is too complicated and demands much time (that i havent). More specific, i mark the intersections one by one, using the "point" command, since first ive put the origin to my coordinate system (the grid is my coordinate system), and then marking the points and writing down the "list" command, i obtain a text including the coordinates that im seeking for (furthermore i have to re-form the text, in order only the coordinates without other text to be obtained ).

Does anyone knows a faster way ??

thanx in advance

no one ?

One way that would be faster is to insert a block at each intersection. Then when you do an attribute extraction, amongst the information of the block is the insertion X,Y coordinates of the block. You can choose to extract only this information which then goes into excel or a data file.

The block can be a simple one like a cross, but because it is a block, you can get the information out.

One way that would be faster is to insert a block at each intersection. Then when you do an attribute extraction, amongst the information of the block is the insertion X,Y coordinates of the block. You can choose to extract only this information which then goes into excel or a data file.

 

The block can be a simple one like a cross, but because it is a block, you can get the information out.

Thats what I do and if it can be improved I would be very keen to hear.

Not sure if it would be any better than what you are already doing but there's a lisp posted here in the forum called PO2TXT written by Fuccaro, that lists points to a txt file like this :

364.2119 ; 153.9238 ; 4.5000
356.9890 ; 118.2579 ; 4.5000
309.0690 ; 124.7824 ; 0.0000
275.0524 ; 152.7754 ; 0.0000
239.3318 ; 166.2459 ; 0.0000
264.5440 ; 211.0347 ; 0.0000
334.1973 ; 209.1100 ; 4.5000
325.7932 ; 198.3127 ; 4.5000
297.8635 ; 167.1718 ; 4.5000
259.7417 ; 138.6528 ; 2.0000
239.3416 ; 80.6587 ; 2.0000

let me know if you can't find it in a search and I'll hunt it up...

At Cadalyst, Bill Kramer (Harry) posted a routine that placed points at all intersections of lines/circles/arcs etc. You could modify the routine to print out x-y coordinates of all intersection points, if that's what you need.

http://management.cadalyst.com/cadman/article/articleDetail.jsp?id=101854