Subject:
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Re: Mindstorms spirit.ocx programming = RCX ASM coding? (fwd)
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 23 Dec 1999 04:00:18 GMT
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Original-From:
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Jim Choate <RAVAGE@EINSTEINspamless.SSZ.COM>
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Viewed:
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612 times
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----- Forwarded message from Dave Baum -----
From: dbaum@spambgoneenteract.com (Dave Baum)
Subject: Re: Mindstorms spirit.ocx programming = RCX ASM coding?
Date: Thu, 23 Dec 1999 02:44:41 GMT
Correct. IMHO, calling this "programming the RCX in VB" is very
misleading. None of the familiar VB features (variables, control
structures, etc) will run on the RCX. For example, in order to construct
an "if" statment, you don't use the VB "if". Instead you use a spirit.ocx
method called If() which takes as parameters the items to be comared and
the type of comparisson. This gets pretty tedious. Here's an example
taken from the SDK:
PBrickCtrl.If 2, 5, 2, 0, 15 | If (constant) 5 = variable 15 then
PBrickCtrl.PlayTone 440, 20 | play a 440 Hz tone for 200 ms.
PBrickCtrl.Else Else
PBrickCtrl.PlayTone 5000, 10 | play a 5000 Hz. tone with a 100 ms. duration
PBrickCtrl.EndIf | Close the If...Else...EndIf control-structure.
I don't know about you, but I'd much rather do something like this:
if (x == 5)
PlayTone(440, 20);
else
PlayTone(5000, 10);
Don't even get me started on how you'd use spirit.ocx to do something like this:
if (x * 2 < y + 5)
PlayTone(440, 20);
----- End of forwarded message from Dave Baum -----
This is why they make pre-processors.
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