[ODE] M_PI problem
Eric Trousset
eTrousset at wanyrobotics.com
Wed Apr 23 06:08:02 2003
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It is because 35 and 180 are integers, so M_PI is casted into an int =
before the * occurs...
you should try 35.0f / 180.0f * M_PI, the result will be a float
=20
-----Message d'origine-----
De : Koby Zalmanson [mailto:zkoby@inter.net.il]
Envoy=E9 : dimanche 20 avril 2003 17:23
=C0 : ode@q12.org
Objet : [ODE] M_PI problem
When I tried to use M_PI in some of the calculations of an angle the =
calculation was 0 for example: 35/180*M_PI
do you know why?
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<DIV><SPAN class=3D383400413-23042003><FONT face=3DArial color=3D#0000ff =
size=3D2>It is=20
because 35 and 180 are integers, so M_PI is casted into an int before =
the *=20
occurs...</FONT></SPAN></DIV>
<DIV><SPAN class=3D383400413-23042003><FONT face=3DArial color=3D#0000ff =
size=3D2>you=20
should try 35.0f / 180.0f * M_PI, the result will be a =
float</FONT></SPAN></DIV>
<DIV><SPAN class=3D383400413-23042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
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solid">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Message d'origine-----<BR><B>De :</B> Koby =
Zalmanson=20
[mailto:zkoby@inter.net.il]<BR><B>Envoy=E9 :</B> dimanche 20 =
avril 2003=20
17:23<BR><B>=C0 :</B> ode@q12.org<BR><B>Objet :</B> [ODE] =
M_PI=20
problem<BR><BR></FONT></DIV>
<DIV class=3DSection1 dir=3Drtl>
<P class=3DMsoNormal dir=3Drtl><FONT face=3DArial size=3D2><SPAN =
dir=3Dltr=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">When I tried to use M_PI =
in some=20
of the calculations of an angle the calculation <SPAN =
class=3DGramE>was <SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>0</SPAN> for example: =
<B><SPAN=20
style=3D"FONT-WEIGHT: =
bold">35/180</SPAN></B>*M_PI<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal dir=3Drtl><FONT face=3DArial size=3D2><SPAN =
dir=3Dltr=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">do you know=20
why?<o:p></o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>
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