Check Parallel lines if intersect

On Cadence support search for clinecut. It should return a link to clinecut.il it should a good example to finding intersections. Also you can try axl_ol_ol2.

 Craig

Thanks Craig for the suggestion.

I to look for the clinecut.il but its not what i want.

Yes, Im already using axl_ol_ol2 to get the intersections.

My problem was,

how can i create a perpendicular(dashed line, see above image) by using either orange or maroon lines to detect if both parrallel lines face each other.Even with only one intersection result can prove that both parallel lines are facing each other.  

To get the perpendicular line you will need to do some vector math. First get the unit vector of the marroon/yellow line (pt1 pt2). From the unit vector you can get he perpendicular vector (-pt2 pt1).

 Craig

Thanks Craig.

Well I guess doing what you suggested is problem.

If its ok for you, can u give me an example?

jerald 

Get the vector of the line (marron/yellow)  for this example the line has coords of ((1,2) (4,4))

v = (x2-x1), (y2-y1)  = (3, 2))

v(perp) = (-2, 3) or (2, -3)

To create a line that starts an one of the points, say (1, 2) to get the end point add the v(perp) to the start point (1-2, 2+3) or (-1, 5). If you want a longer or shorter line scale the vector. 

You can also use unit vector and magnitude but this should be easier. Pull out your Calculas II textbook or search the web for vector math.

Regards,

Craig