Animation curve is always linear though specified to be S-like

[Oleg Krupnov]

The problem is that my animation always seems to perform linearly, not
S-like, although I specify it to do the latter.

Here's my code:

@interface MyAnimation : NSAnimation
{
}
...
@end

@implementation MyAnimation

- (id)init
{
    self = [super initWithDuration:0.1F animationCurve:NSAnimationEaseInOut];
    if (self)
    {
        ...
    }
    return self;
}

- (void)setCurrentProgress:(NSAnimationProgress)progress
{
    [super setCurrentProgress:progress];
    NSLog( [NSString stringWithFormat:@"%f", progress]);
}
@end

I get the following log:

0.166700
0.333450
0.499950
0.666610
0.833090
0.999710
1.000000

It follows that the animation is linear (the increment is constant)

What am I doing wrong?

Thanks
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