#Autocad lisp ortho zip file
#Autocad lisp ortho download

But before we change it, it is a good thing to restore the system variable after the program ends. We need to change it to 1 to make ortho mode active. This behavior is controlled by system variable ORTHOMODE.

To achieve that, we need to draw line with ortho mode is on. We want to create the grid horizontal or vertical. Changing AutoCAD system variableДЄnother thing we need to do is change an AutoCAD system variable temporarily. For right direction, we donвЂ™t have to define it because we already set it as default block name. We define the three conditions in our program. X1, Y1 is the first picked point, and X2, Y2 is the 2nd point picked by user. When we draw a grid to bottom, there are two conditions are met: But when we draw it to bottom, we need to use block VGRIDBOTTOM. We will use this block when we draw grid line to the right. ((AND (= pt1x pt2x) ( pt1x pt2x) (= pt1y pt2y)) (setq gridblockname 'hgridleft'))ДЇirst, we set the block name to HGRIDRIGHT. ((AND (= pt1x pt2x) (> pt1y pt2y)) (setq gridblockname 'vgridbottom')) change block name when meet the condition LetвЂ™s see what can we do with COND in our case. ((condition c) (things to do when condition c is met) ((condition b) (things to do when condition b is met) ((condition a) (things to do when condition a is met) COND will only do things when the condition is met. When using IF, you can tell AutoCAD to do A when condition is met. Or if you completely new to AutoLISP, follow the tutorial from beginning here.Д¬OND is a bit different with IF. So if you havenвЂ™t read it or want to refresh your memory, read the AutoLISP tutorial here.

This AutoLISP tutorial requires you to understand what we did previously. We will use conditional COND to choose which AutoCAD block we should use.

#Autocad lisp ortho zip file

The zip file has 4 AutoCAD DWG files, each file is a grid label for each direction.

#Autocad lisp ortho download

The program we will make in this AutoLISP tutorial will draw grid line, and automatically place label at the end of line.Д«efore you start, you need to download this file first. We will also touch AutoCAD system variables, one of the most important thing in AutoLISP.

This time we will try to use another conditional, using COND. We can use our reusable content to make AutLISP programming less complex, and we can maintain our drawing standard in AutoCAD. Using AutoCAD block in AutoLISP is a great benefit. In the last AutoLISP tutorial, we have tried to place block and change the attribute value.