Re-evaluating values - GameCreators Forum

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Zotoaster

19

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Joined: 20th Dec 2004

Location: Scotland

Posted: 19th Feb 2008 19:29

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I'm trying to get this to work, but it wont. You may not see the point yet but I'll be wanting to change the angle - gotta get this working first though.

+ Code Snippet

		float MsVecDist	= sqrt( (float)( dbMouseMoveX() * dbMouseMoveX() ) + (float)( dbMouseMoveY() * dbMouseMoveY() ) );
		float MsVecAng	= dbAtanFull( (float)dbMouseMoveX(), (float)dbMouseMoveY() );
		float MsVecX	= dbSin( MsVecAng ) * MsVecDist;
		float MsVecY	= dbCos( MsVecAng ) * MsVecDist;

MsVecX and MsVecY should basically be float versions of dbMouseMoveX() and dbMouseMoveY(), but they aren't. What is the problem here?

Thanks

Don't you just hate that Zotoaster guy?

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Morcilla

21

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Joined: 1st Dec 2002

Location: Spain

Posted: 20th Feb 2008 17:54

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The code seems fine but, have you tried using dbMouseX, dbMouseY instead of dbMouseMoveX, dbMouseMoveY? If I remember correctly, the Mouse Move functions doesn't really return the values that I think you're searching for

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jason p sage

17

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Joined: 10th Jun 2007

Location: Ellington, CT USA

Posted: 20th Feb 2008 18:58

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Agreed on the dbMoveMove versus MouseX - unless... his mini vector world is based on the difference between his last scan - and not the TOTAL distance the mouse traveled.

I mean - if you think vectors... or ploting... and think every loop - your mouse is at a "arbitrary" point that I'll say is 0,0 then in that case the dbMoveMovedX thing should show the distances from that "origin".

Its his other math that throws me - I recognize the distance calc but I don't quite see how its suppose to arrive at what he's asking it to... but thats me being slow.

http://www.jasonpetersage.com/?PAGE=ironinfantry&SECTION=ironinfantry

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Jeff032

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Joined: 13th Aug 2007

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Posted: 20th Feb 2008 19:06 Edited at: 20th Feb 2008 19:09

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The problem (or one of them) is that you are calling dbMouseMoveX() and dbMouseMoveY() twice each. The second time they will always be zero. You should store them in a variable and use that instead.

(I think that's how they work...)

Anyway, if that is the problem, debugging probably would have told you what was wrong relatively quickly.