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Dark GDK / dbATANFULL

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Dimension

Years of Service

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Joined: 23rd Nov 2003

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Posted: 26th Aug 2010 01:58

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I'm trying to use this function for calculating angles and acording to the description of the function it's suppose to calculate from 0 to 360 degrees but it goes from 0 to 180 to 0(see example bellow). Does anybody know why it does this?

+ Code Snippet

dbText(150, 0, "0  :");
dbText(190, 0, dbStr(dbATANFULL(0, 5)));
dbText(150, 20, "90 :");
dbText(190, 20, dbStr(dbATANFULL(5, 0)));
dbText(150, 40, "180:");
dbText(190, 40, dbStr(dbATANFULL(0, -5)));
dbText(150, 60, "270:");
dbText(190, 60, dbStr(dbATANFULL(-5, 0)));

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Mireben

Years of Service

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Joined: 5th Aug 2008

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Posted: 26th Aug 2010 11:01

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Dark GDK likes to return negative angles when the angle is between 180-359. So instead of 270 it gives you -90. You can see the negative sign in the output of your program. If the result is negative, deduct it from 360 (actually add, not deduct, since it is already negative) and you're done.

(P.S. Just in case you don't know yet, using dbStr like this causes memory leak, it's OK for testing but don't leave it in the final program.)

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Dark GDK / dbATANFULL