Relative coordinates in a macro 1

[Racer24ksi]

I'm tinkering with a macro definition for an AutoCAD button that will create a leader line to be used for a welding symbol. The macro needs to create a leader in MS with the tail being exactly 1" in PS. The sticking point is my logic wants to use a relative coordinate definition that is based upon the DIMSCALE. I have been unable to figure out how to use relative coordinates in a macro without actually prompting for user input.

The only thing that works half-way is this:

^C^C(SETQ LX (GETVAR "DIMSCALE&quotLY '0);_LEADER;\\;;N;UCS;O;@;LINE;@;(LIST LX LY);;UCS;P;

The problem is, the specification "@" for last point picked (also LASTPOINT value) works correctly when starting in WCS, but if starting in anything other than WCS, the @ point is off in the stratosphere.

I want to believe that if I can use relative coordinates for the last point without stopping the leader command and going to draw a line based on a new UCS that it would work better.

Thoughts?

Thanks in advance!

Bill
Racer24ksi

 

[tigrek]

In lisp, I use (polar point1 distance angle) to gt to the next point.

 

[Racer24ksi]

Thanks for the tip - that worked out perfect on the first attempt:

^C^C_LEADER;\\(polar (getvar "lastpoint&quot 0 (getvar "dimscale&quot);;;N;

Note: Because the tail of the leader is supposed to be 1", the DIMSCALE value is equal to 1" in PS.

Bill
Racer24ksi

 

[tigrek]

Whaw. You made the tip into something real cute. To include those two getvars is ingenious. I would have to go more roundabout to get there. You produced the most compact code I have seen since a long time.

Take care.

http://www.homescript.com

 

[Racer24ksi]

Well, even a blind squirrel finds a nut now and then!

BTW - Playing with it a little further, the syntax is actually (polar point1 angle distance) where angle is in radians. To make the leader tail 1" in the opposite direction, replace 0 with pi:

^C^C_LEADER;\\(polar (getvar "lastpoint&quot pi (getvar "dimscale&quot);;;N;

For angles other than 0 and 180, math functions worked well too:

^C^C_LEADER;\\(polar (getvar "lastpoint&quot (/ pi 2) (getvar "dimscale&quot);;;N;

would produce a tail oriented 90 degrees vertical.

Thanks again for your help.

Bill
Racer24ksi