hey there,
you'll have to forgive me ive only been doing autolisp for about a week so
this is going to sound a bit stupid. but here we go.
i have two points that are relative to a user defined point and i need to
make a point that will always be at the mid point of those two points
regardless of the distance between them as chosen by the person running the
program.
im not sure how clear i just made that as i am running on no sleep and am
getting slightly frustrated.
any help would be very kind
Floyd
Hi
"brazious" skrev i en meddelelse
news:CnDfb.50603$Ms2.40617@fed1read03...
You load and use the application I place here ;
defun im (/ div dell a b)
(setq div(getint " How many points between endpoints ? ")
(setq dell(getint " on what number point do you want to Snap ?"))
(setq a (getpoint "Point One : "))
(setq b (getpoint "Point Two : "))
(mapcar '- a
(mapcar '* (mapcar '/ (mapcar '- a b) (cons div(list div div)))
(cons dell(list dell dell)))
))
This piece of code, work transparent when you point your way thru , point after
point , and can place a point in 3D , one third out , or 2 fifth out , from one
point to another.
This is even a 3D Snap , as input points with juicy Lisp is defined as lists
with x y an z values.
This mean that somthing like as effevtive the spots is on the screen before you,
a Lisp application can offer you the magic stick of 3D projecting free hand.
Who ever need that. But the function work ; you subtract one point list from
another, divide equaly x y and z with how many points between the two points you
want your new point, in between, but use it carefully it is acturly a very nice
design tool, when everything else don't work ;))
P.C.
Hey again,
thanks for the help (and I will definantly keep the app you posted handy for
future reference) but I think that I may have made my task seem a little
more complicated than it is. Basically it works like this. I have what
essentially looks like a 2d box right now. The user picks a base point the
sets height and width and it looks a bit like this
Ftg4 ftg3
Ftg1 ftg2
Those are the points I have so far. The point I need to create needs to
always be between ftg3 & 4 (regardless of height or width) because I need to
put a slot there. So that it will look like this.
Ftg4 kw1 kw2 ftg3
kw4 kw3
Ftg1 ftg2
But first I need a midpoint between ftg3 & 4 to base the kw points off of.
This is crucial because I need to do similar steps to create the rest of the
image. (will eventually be a footing detail) so basically what I am trying
to do is setq a point that will always be between ftg4 & 3.
Sorry about the miscomunication there as I stated I was very tired at the
time of my message and wasn't making much sense to myself. So just to clear
up somethings. The detail is completely 2d. And im basicaly looking for a
way to grab the distance between two setq'd points (not literal drawn points
just setq'd reference points) and setq another point to automatically be
there regardless of height or distance.
Once again im sorry for the trouble and am gratefull for the help up to this
point.
Floyd
HiHo;
The cal command will do that very well
cal can be used transparently by preceeding
the command with ' i.e. 'cal
Then mee which is short for
middle end end.
cal can also be used to fine
both slot points.
by using plt or
point line percentage of total length.
cal can be used in a lisp program
by prefixing i.e.
(command 'cal mee(end,end))
Jeff, I can't even believe how complicated I've made that very task.
LOL (I'm not telling you how I did that, on the grounds that it may
tend to incriminate me as a maroon.)
Thanks for your post.
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.