Titlebook: Essential AutoLISP®; With a Quick Referen Roy Harkow Book 1996 Springer-Verlag New York, Inc. 1996 AutoLISP.LISP.functions

我怕被刺穿

d-limonene

Intelligent Control and Learning SystemsAutoLISP has a very thorough error-reporting mechanism, but its debugging facilities are comparatively weak. We can maximize our productivity by understanding the various error messages and what causes them, and by knowing the best ways to avoid errors in the first place.

呼吸

Studies in Computational IntelligenceAs we become more experienced with AutoLISP we gain certain realizations and lightbulbs click on. Some of these make us exclaim, “Why didn’t I think of that sooner?” Other insights are more profound and may take weeks or even months to realize. In this chapter, as throughout the book, my intent is to help shorten that learning curve.

Entreaty

deadlock

细胞膜

Evaluation of AutoLISP ExpressionsProblem solving involves modeling the real world inside the computer. We perform this familiar process all the time in our drawings, knowing full well that we’re looking at, say, a wireframe, rather than a real object.

小样他闲聊

Writing and Running FunctionsMost of us who have played around with AutoLISP have encountered defun, the subr we use to write our own functions. But there’s much more to writing functions than just learning how to use this subr.

不可侵犯

Control Structure: Producing Powerful ProgramsThis chapter provides a transition from the language fundamentals we have seen so far to the more practical aspects of AutoLISP. We begin by learning the contracts of many subrs. These subrs are integrally tied to the workings of AutoLISP because they enhance our control over the functions that we write.

以烟熏消毒

FUSC

Input/OutputOf all the features Autodesk added to the AutoLISP language, the get functions might be the sweetest. They enable us to tailor our AutoCAD commands to look exactly like the built-in AutoCAD commands. Furthermore, they’re extremely intuitive and easy to use.