Mac Forum / Programming / Mac Programming / January 2006

Hi,

I'm writing a plugin (Cocoa bundle) for a Cocoa application in Xcode.
The plugin is given two arrays of doubles, and computes out[i]=sin(in[i]);

I graph this data in the main application, and verify that the actual
data handoff works just fine.  For example, if I code "out[i]=in[i]"
the that gets transferred after the plugin is invoked.

Here's the goofy part:  when I put the sin() in there, out[i] is 0.0.
The function is just returning 0s.  Ditto for other math functions like
cos(), exp(), etc.

Now, I include math.h, and I added -lm to the linker, and I
explicitly declare "double sin(double x);" in my plugin code.  I
don't get any linker errors or warnings---everything compiles and links
fine.  But the sin() function just returns 0.0.  

I'm really pulling my hair out over this.  Anyone have any idea what I
should try?  Again, this is not a Cocoa application, but a cocoa bundle.
Could that have something to do with it?

Thanks,
Xcott