J_Melcher Posted November 17, 2008 Share Posted November 17, 2008 I've worked with Cad for a few years now and still dont completely understand AutoLISP and XRef's yet. Could anyone explain exactly what they are and the advantages of using these tools? Quote Link to comment Share on other sites More sharing options...
devitg Posted November 17, 2008 Share Posted November 17, 2008 Lisp allow to make some special task , surveyors are the main user , as you can draw a bunch of points from the surveyor data in a text file. Also you can develop task on dwg , like to put the area value at hatchs or closed polys. In all , when you need repetitive task, you can do it by LISP. About X-REF, it mean EXTERNAL REFERENCE , it allow to reference an DWG with out the need to add it to your DWG Guess you work in plumbing , and get the Building DWG, you can open a new DWG , X-ref the main dwg , and make you task on Your's . Hope it help. Quote Link to comment Share on other sites More sharing options...
tzframpton Posted November 18, 2008 Share Posted November 18, 2008 I've worked with Cad for a few years now and still dont completely understand AutoLISP and XRef's yet. Could anyone explain exactly what they are and the advantages of using these tools? Not wanting to take away from the other poster's message, but it could be a bit more clear. AutoLISP is simply a programming language that is read by AutoCAD. With this, you can customize custom programs and collaborate with current tools AutoCAD uses to make life easier and MUCH faster within the program. It takes awhile to get really effecient and good at it, but there are so many people out there that have created their own apps free of charge for the world to use. Just as the 2nd poster said, XREF's stand for External References. It is basically a tool that allows you to "import" or "link" another AutoCAD file in the current drawing you're working with. This way, when there are any changes made to the original drawing, any other drawing that has it XREF'ed into it the change will update automatically. Example: You have a floorplan that has 4 rooms and 2 bathrooms. That floorplan has been XREF'ed into a drawing, so that you can layout the Electrical plan overtop the floorplan. But then there is a change to the floorplan, say a 5th room has been added. Well now instead of Copy/Pasting the new changes into the Electrical plan, since it's XREF'ed in, the changes were made automatically so you can adjust your Electrical to coordinate. Hope this all makes sense. Quote Link to comment Share on other sites More sharing options...
J_Melcher Posted November 18, 2008 Author Share Posted November 18, 2008 Thanks devitg and stykface for explaining it. I have a better understanding now on both the subjects. Quote Link to comment Share on other sites More sharing options...
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