OOJoystickSplineAxisProfile(Private) Category Reference

Instance Methods
(BOOL)	- makeSegments

Detailed Description

Definition at line 76 of file OOJoystickProfile.m.

Method Documentation

makeSegments

- (BOOL) makeSegments

Extends class OOJoystickSplineAxisProfile.

Definition at line 39 of file OOJoystickProfile.m.

{
    NSUInteger i;
    NSPoint left, right, next;
    double gradientleft, gradientright;
    OOJoystickSplineSegment* segment;
    BOOL first_segment = YES;
    NSMutableArray *new_segments = [NSMutableArray arrayWithCapacity: ([controlPoints count] + 1)];
 
    left.x = 0.0;
    left.y = 0.0;
    if ([controlPoints count] == 0)
    {
        right.x = 1.0;
        right.y = 1.0;
        segment = [OOJoystickSplineSegment segmentWithData: left right: right];
        [new_segments addObject:segment];
    }
    else
    {
        gradientleft = 1.0;
        right = [[controlPoints objectAtIndex: 0] pointValue];
        for (i = 0; i < [controlPoints count]; i++)
        {
            next = [self pointAtIndex: i + 1];
            if (next.x - left.x > 0.0)
            {
                // we make the gradient at right equal to the gradient of a straight line between the neighcouring points
                gradientright = (next.y - left.y)/(next.x - left.x);
                if (first_segment)
                {
                    segment = [OOJoystickSplineSegment segmentWithData: left right: right gradientright: gradientright];
                }
                else
                {
                    segment = [OOJoystickSplineSegment segmentWithData: left right: right gradientleft: gradientleft gradientright: gradientright];
                }
                if (segment == nil)
                {
                    return NO;
                }
                else
                {
                    [new_segments addObject: segment];
                    gradientleft = gradientright;
                    first_segment = NO;
                    left = right;
                }
            }
            right = next;
        }
        right.x = 1.0;
        right.y = 1.0;
        segment = [OOJoystickSplineSegment segmentWithData: left right: right gradientleft: gradientleft];
        if (segment == nil)
        {
            return NO;
        }
        [new_segments addObject: segment];
    }
    [segments release];
    segments = [[NSArray arrayWithArray: new_segments] retain];
    return YES;
}
 

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The documentation for this category was generated from the following file:

• src/Core/OOJoystickProfile.m