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low points and high points on a 3d poly

iain9876

By iain9876
in AutoLISP, Visual LISP & DCL

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iain9876

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Sorry about the miss-spelt title! should be "Low points and high points on a 3d poly"!

 

Does anyone have a routine to put low points and high points on a 3d poly?

 

I have a 3d poly which goes up and down (various sags and crests) over half a mile. I need a routine that puts a cross and the text "HP" for a high point on the crest and "LP" for the low point on a sag in varying locations along this polyline.

 

I know this one is going to be a challenge as the 3d polylines are not curves but straights.

 

Anyone heard of a routine like this or have one?

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fixo Mentor

fixo

Posted
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Sorry about the miss-spelt title! should be "Low points and high points on a 3d poly"!

 

Does anyone have a routine to put low points and high points on a 3d poly?

 

I have a 3d poly which goes up and down (various sags and crests) over half a mile. I need a routine that puts a cross and the text "HP" for a high point on the crest and "LP" for the low point on a sag in varying locations along this polyline.

 

I know this one is going to be a challenge as the 3d polylines are not curves but straights.

 

Anyone heard of a routine like this or have one?

 

The sample picture would be easier for understanding :)

 

~'J'~

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David Bethel Grand Master

David Bethel

Posted
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Here would be a basic starting point:

 

 

[b][color=BLACK]([/color][/b]defun c:extz3dp [b][color=FUCHSIA]([/color][/b]/ ss i en ed vn vd pl maxz minz[b][color=FUCHSIA])[/color][/b]

[color=#8b4513];;;ARG -> point  text_value text_size[/color]
 [b][color=FUCHSIA]([/color][/b]defun make_tick [b][color=NAVY]([/color][/b]p v s[b][color=NAVY])[/color][/b]
   [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"LINE"[/color][b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]cons 10 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 0.25[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]cons 11 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 1.25[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
   [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"LINE"[/color][b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]cons 10 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 0.75[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]cons 11 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 1.75[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
   [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"TEXT"[/color][b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 1 v[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 6 [color=#2f4f4f]"BYLAYER"[/color][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 7 [color=#2f4f4f]"STANDARD"[/color][b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 8 [color=#2f4f4f]"0"[/color][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 10 p[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 11 p[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 39 0.0[b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 40 s[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 41 1.0[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 62 256[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 72 4[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]

 [b][color=FUCHSIA]([/color][/b]and [b][color=NAVY]([/color][/b]setq ss [b][color=MAROON]([/color][/b]ssget [color=#2f4f4f]"X"[/color] [b][color=GREEN]([/color][/b]list [b][color=BLUE]([/color][/b]cons 0 [color=#2f4f4f]"POLYLINE"[/color][b][color=BLUE])[/color][/b]
                                [b][color=BLUE]([/color][/b]cons 66 1[b][color=BLUE])[/color][/b]
                                [b][color=BLUE]([/color][/b]if [b][color=RED]([/color][/b]getvar [color=#2f4f4f]"CTAB"[/color][b][color=RED])[/color][/b]
                                    [b][color=RED]([/color][/b]cons 410 [b][color=PURPLE]([/color][/b]getvar [color=#2f4f4f]"CTAB"[/color][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                                    [b][color=RED]([/color][/b]cons 67 [b][color=PURPLE]([/color][/b]- 1 [b][color=TEAL]([/color][/b]getvar [color=#2f4f4f]"TILEMODE"[/color][b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                                [b][color=BLUE]([/color][/b]cons -4 [color=#2f4f4f]"&"[/color][b][color=BLUE])[/color][/b]
                                  [b][color=BLUE]([/color][/b]cons 70 8[b][color=BLUE])[/color][/b]
                                    [b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
      [b][color=NAVY]([/color][/b]setq i [b][color=MAROON]([/color][/b]sslength ss[b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
      [b][color=NAVY]([/color][/b]while [b][color=MAROON]([/color][/b]not [b][color=GREEN]([/color][/b]minusp [b][color=BLUE]([/color][/b]setq i [b][color=RED]([/color][/b]1- i[b][color=RED])[/color][/b][b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
             [b][color=MAROON]([/color][/b]setq en [b][color=GREEN]([/color][/b]ssname ss i[b][color=GREEN])[/color][/b]
                   ed [b][color=GREEN]([/color][/b]entget en[b][color=GREEN])[/color][/b]
                   vn [b][color=GREEN]([/color][/b]entnext en[b][color=GREEN])[/color][/b]
                   vd [b][color=GREEN]([/color][/b]entget vn[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
             [b][color=MAROON]([/color][/b]while [b][color=GREEN]([/color][/b]and [b][color=BLUE]([/color][/b]= [color=#2f4f4f]"VERTEX"[/color] [b][color=RED]([/color][/b]cdr [b][color=PURPLE]([/color][/b]assoc 0 vd[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                         [b][color=BLUE]([/color][/b]= 32 [b][color=RED]([/color][/b]cdr [b][color=PURPLE]([/color][/b]assoc 70 vd[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
                    [b][color=GREEN]([/color][/b]setq pl [b][color=BLUE]([/color][/b]cons [b][color=RED]([/color][/b]cdr [b][color=PURPLE]([/color][/b]assoc 10 vd[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b] pl[b][color=BLUE])[/color][/b]
                          vn [b][color=BLUE]([/color][/b]entnext vn[b][color=BLUE])[/color][/b]
                          vd [b][color=BLUE]([/color][/b]entget vn[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]

      [b][color=NAVY]([/color][/b]foreach v pl
        [b][color=MAROON]([/color][/b]if [b][color=GREEN]([/color][/b]not maxz[b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]setq maxz v[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
        [b][color=MAROON]([/color][/b]if [b][color=GREEN]([/color][/b]not minz[b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]setq minz v[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
        [b][color=MAROON]([/color][/b]if [b][color=GREEN]([/color][/b]>= [b][color=BLUE]([/color][/b]caddr v[b][color=BLUE])[/color][/b] [b][color=BLUE]([/color][/b]caddr maxz[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]setq maxz v[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
        [b][color=MAROON]([/color][/b]if [b][color=GREEN]([/color][/b]<= [b][color=BLUE]([/color][/b]caddr v[b][color=BLUE])[/color][/b] [b][color=BLUE]([/color][/b]caddr minz[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
            [b][color=GREEN]([/color][/b]setq minz v[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]

       [b][color=NAVY]([/color][/b]make_tick minz [color=#2f4f4f]"LP"[/color] 2[b][color=NAVY])[/color][/b]
       [b][color=NAVY]([/color][/b]make_tick maxz [color=#2f4f4f]"HP"[/color] 2[b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]

  [b][color=FUCHSIA]([/color][/b]prin1[b][color=FUCHSIA])[/color][/b][b][color=BLACK])[/color][/b]

 

Some limits or thing to address:

What happens if there are 2 or more points that have the min or max z values

Filter only 3DPOLYINEs

Uses VERTEX control points only

A (ssget) filter to skip curved fitted 3DPOLYs would be nice

Adjust the call to make_tick for size

Adjust make_tick TEXT values to your needs

 

-David

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fixo Mentor

fixo

Posted
Posted
Here would be a basic starting point:

 

Some limits or thing to address:

What happens if there are 2 or more points that have the min or max z values

Filter only 3DPOLYINEs

Uses VERTEX control points only

A (ssget) filter to skip curved fitted 3DPOLYs would be nice

Adjust the call to make_tick for size

Adjust make_tick TEXT values to your needs

 

-David

 

Hi David

Nice code as always!

I have found one more limit:

if the start point or end point have Z=0

program failed

 

~'J'~

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David Bethel Grand Master

David Bethel

Posted
Posted
if the start point or end point have Z=0

program failed

 

That doesn't surprise me

 

Maybe this will help:

 

[b][color=BLACK]([/color][/b]defun c:extz3dp [b][color=FUCHSIA]([/color][/b]/ ss i en ed vn vd pl maxz minz[b][color=FUCHSIA])[/color][/b]

[color=#8b4513]; [b][color=FUCHSIA]([/color][/b]*-debug-* 9 [color=#2f4f4f]"extz3pd"[/color][b][color=FUCHSIA])[/color][/b][/color]

[color=#8b4513];;;ARG -> point  text_value text_size[/color]
 [b][color=FUCHSIA]([/color][/b]defun make_tick [b][color=NAVY]([/color][/b]p v s[b][color=NAVY])[/color][/b]
   [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"LINE"[/color][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 10 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 0.25[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 11 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 1.25[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
   [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"LINE"[/color][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 10 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 0.75[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 11 [b][color=BLUE]([/color][/b]polar p [b][color=RED]([/color][/b]* pi 1.75[b][color=RED])[/color][/b] s[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
   [b][color=NAVY]([/color][/b]entmake [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"TEXT"[/color][b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 1 v[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 6 [color=#2f4f4f]"BYLAYER"[/color][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 7 [color=#2f4f4f]"STANDARD"[/color][b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 8 [color=#2f4f4f]"0"[/color][b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 10 p[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 11 p[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 39 1e-8[b][color=GREEN])[/color][/b]
                  [b][color=GREEN]([/color][/b]cons 40 s[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 62 256[b][color=GREEN])[/color][/b][b][color=GREEN]([/color][/b]cons 72 4[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]

 [b][color=FUCHSIA]([/color][/b]if [b][color=NAVY]([/color][/b]setq ss [b][color=MAROON]([/color][/b]ssget [color=#2f4f4f]"X"[/color] [b][color=GREEN]([/color][/b]list [b][color=BLUE]([/color][/b]cons 0 [color=#2f4f4f]"POLYLINE"[/color][b][color=BLUE])[/color][/b]
                               [b][color=BLUE]([/color][/b]if [b][color=RED]([/color][/b]getvar [color=#2f4f4f]"CTAB"[/color][b][color=RED])[/color][/b]
                                   [b][color=RED]([/color][/b]cons 410 [b][color=PURPLE]([/color][/b]getvar [color=#2f4f4f]"CTAB"[/color][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                                   [b][color=RED]([/color][/b]cons 67 [b][color=PURPLE]([/color][/b]- 1 [b][color=TEAL]([/color][/b]getvar [color=#2f4f4f]"TILEMODE"[/color][b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                               [b][color=BLUE]([/color][/b]cons -4 [color=#2f4f4f]"<NOT"[/color][b][color=BLUE])[/color][/b]
                                 [b][color=BLUE]([/color][/b]cons -4 [color=#2f4f4f]"&"[/color][b][color=BLUE])[/color][/b]
                                 [b][color=BLUE]([/color][/b]cons 70 4[b][color=BLUE])[/color][/b]
                               [b][color=BLUE]([/color][/b]cons -4 [color=#2f4f4f]"NOT>"[/color][b][color=BLUE])[/color][/b]
                               [b][color=BLUE]([/color][/b]cons -4 [color=#2f4f4f]"&"[/color][b][color=BLUE])[/color][/b]
                                 [b][color=BLUE]([/color][/b]cons 70 8[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b]
      [b][color=NAVY]([/color][/b]progn
        [b][color=MAROON]([/color][/b]setq i [b][color=GREEN]([/color][/b]sslength ss[b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b]
        [b][color=MAROON]([/color][/b]while [b][color=GREEN]([/color][/b]not [b][color=BLUE]([/color][/b]minusp [b][color=RED]([/color][/b]setq i [b][color=PURPLE]([/color][/b]1- i[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
               [b][color=GREEN]([/color][/b]setq en [b][color=BLUE]([/color][/b]ssname ss i[b][color=BLUE])[/color][/b]
                     ed [b][color=BLUE]([/color][/b]entget en[b][color=BLUE])[/color][/b]
                     vn [b][color=BLUE]([/color][/b]entnext en[b][color=BLUE])[/color][/b]
                     vd [b][color=BLUE]([/color][/b]entget vn[b][color=BLUE])[/color][/b]
                     pl nil[b][color=GREEN])[/color][/b]
               [b][color=GREEN]([/color][/b]while [b][color=BLUE]([/color][/b]= [color=#2f4f4f]"VERTEX"[/color] [b][color=RED]([/color][/b]cdr [b][color=PURPLE]([/color][/b]assoc 0 vd[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                      [b][color=BLUE]([/color][/b]setq pl [b][color=RED]([/color][/b]cons [b][color=PURPLE]([/color][/b]cdr [b][color=TEAL]([/color][/b]assoc 10 vd[b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b] pl[b][color=RED])[/color][/b]
                            vn [b][color=RED]([/color][/b]entnext vn[b][color=RED])[/color][/b]
                            vd [b][color=RED]([/color][/b]entget vn[b][color=RED])[/color][/b][b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]

               [b][color=GREEN]([/color][/b]setq maxz [b][color=BLUE]([/color][/b]list [b][color=RED]([/color][/b]car pl[b][color=RED])[/color][/b][b][color=BLUE])[/color][/b]
                     minz [b][color=BLUE]([/color][/b]list [b][color=RED]([/color][/b]car pl[b][color=RED])[/color][/b][b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
               [b][color=GREEN]([/color][/b]foreach v pl
                 [b][color=BLUE]([/color][/b]cond [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]equal v [b][color=TEAL]([/color][/b]car maxz[b][color=TEAL])[/color][/b] 1e-8[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                       [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]> [b][color=TEAL]([/color][/b]caddr v[b][color=TEAL])[/color][/b] [b][color=TEAL]([/color][/b]caddr [b][color=OLIVE]([/color][/b]car maxz[b][color=OLIVE])[/color][/b][b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b]
                        [b][color=PURPLE]([/color][/b]setq maxz [b][color=TEAL]([/color][/b]list v[b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                       [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]equal [b][color=TEAL]([/color][/b]caddr v[b][color=TEAL])[/color][/b] [b][color=TEAL]([/color][/b]caddr [b][color=OLIVE]([/color][/b]car maxz[b][color=OLIVE])[/color][/b][b][color=TEAL])[/color][/b] 1e-8[b][color=PURPLE])[/color][/b]
                        [b][color=PURPLE]([/color][/b]setq maxz [b][color=TEAL]([/color][/b]cons v maxz[b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                       [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]equal v [b][color=TEAL]([/color][/b]car minz[b][color=TEAL])[/color][/b] 1e-8[b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                       [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]< [b][color=TEAL]([/color][/b]caddr v[b][color=TEAL])[/color][/b] [b][color=TEAL]([/color][/b]caddr [b][color=OLIVE]([/color][/b]car minz[b][color=OLIVE])[/color][/b][b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b]
                        [b][color=PURPLE]([/color][/b]setq minz [b][color=TEAL]([/color][/b]list v[b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b]
                       [b][color=RED]([/color][/b][b][color=PURPLE]([/color][/b]equal [b][color=TEAL]([/color][/b]caddr v[b][color=TEAL])[/color][/b] [b][color=TEAL]([/color][/b]caddr [b][color=OLIVE]([/color][/b]car minz[b][color=OLIVE])[/color][/b][b][color=TEAL])[/color][/b] 1e-8[b][color=PURPLE])[/color][/b]
                        [b][color=PURPLE]([/color][/b]setq minz [b][color=TEAL]([/color][/b]cons v minz[b][color=TEAL])[/color][/b][b][color=PURPLE])[/color][/b][b][color=RED])[/color][/b][b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]

               [b][color=GREEN]([/color][/b]foreach p minz
                   [b][color=BLUE]([/color][/b]make_tick p [color=#2f4f4f]"LP"[/color] 2[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b]
               [b][color=GREEN]([/color][/b]foreach p maxz
                   [b][color=BLUE]([/color][/b]make_tick p [color=#2f4f4f]"HP"[/color] 2[b][color=BLUE])[/color][/b][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]

 [b][color=FUCHSIA]([/color][/b]prin1[b][color=FUCHSIA])[/color][/b][b][color=BLACK])[/color][/b]

 

 

-David

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Lee Mac Grand Master

Lee Mac

Posted
Posted

This should mark all the Peaks and Troughs on your polyline:

 

;; High-Low Point  ~  Lee McDonnell (Lee Mac)  ~  01.12.2009

(defun c:Hi_Low (/ mk_pt ent i pt dif t1 t2)
 (vl-load-com)

 (defun mk_pt (p txt)
   (entmake (list (cons 0 "LINE") (cons 10 (polar p (/ pi 4.) 2.))
                  (cons 11 (polar p (/ (* 5 pi) 4.) 2.))))
   (entmake (list (cons 0 "LINE") (cons 10 (polar p (/ (* 3 pi) 4.) 2.))
                  (cons 11 (polar p (/ (* 7 pi) 4.) 2.))))
   (entmake (list (cons 0 "TEXT") (cons 40 (getvar "TEXTSIZE"))
                  (cons 1 txt) (cons 10 p) (cons 72 1) (cons 73 1) (cons 11 p)))) 

 (while
   (progn
     (setq ent (car (entsel "\nSelect 3D-Polyline: ")))

     (cond (  (eq 'ENAME (type ent))
            
              (if (eq "POLYLINE" (cdr (assoc 0 (entget ent))))
                (if (and (not (eq 8 (logand 8 (cdr (assoc 70 (entget ent))))))
                              (eq 4 (logand 4 (cdr (assoc 70 (entget ent))))))
                  (princ "\n** Object Must not have Arc Vertices **")
                  (progn

                    (setq i (1- (vlax-curve-getStartParam ent)))

                    (while (<= (setq i (1+ i)) (vlax-curve-getEndParam ent))

                      (setq pt  (vlax-curve-getPointatParam ent i)

                            dif (cond (  (eq (vlax-curve-getStartParam ent) i)
                                         (setq t2 (-  (caddr pt) (caddr (vlax-curve-getPointatParam ent (+ i 0.5)))))
                                         (if (not (zerop t2)) t2))                                       

                                      (  (eq (vlax-curve-getEndParam ent) i)
                                         (setq t2 (-  (caddr pt) (caddr (vlax-curve-getPointatParam ent (- i 0.5)))))
                                         (if (not (zerop t2)) t2))                                        

                                      (t (setq t1 (-  (caddr pt) (caddr (vlax-curve-getPointatParam ent (+ i 0.5))))
                                               t2 (-  (caddr pt) (caddr (vlax-curve-getPointatParam ent (- i 0.5)))))

                                         (if (not (or (zerop t2) (minusp (/ t1 t2)))) t2))))
                      (if dif
                        (mk_pt (vlax-curve-getPointatParam ent i)
                               (if (minusp dif) "LP" "HP"))))  t))
                
                (princ "\n** Object Must be a 3D-Polyline **"))))))
 (princ))

 

Hope this helps,

 

Lee

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