Visualize Bézier curves in cocos2d

BezierCurveNode.h

#import "cocos2d.h"

@interface BezierCurveNode : CCNode

@property (nonatomic) CGPoint origin;
@property (nonatomic) CGPoint cp1;
@property (nonatomic) CGPoint cp2;
@property (nonatomic) CGPoint destination;
@property (nonatomic) ccColor3B color;

- (id)initWithOrigin:(CGPoint)origin
       controlPoint1:(CGPoint)cp1
       controlPoint2:(CGPoint)cp2
         destination:(CGPoint)destination
               color:(ccColor3B)color;

- (id)initWithOrigin:(CGPoint)origin config:(ccBezierConfig)config;

@end

BezierCurveNode.m

#import "BezierCurveNode.h"
#import "cocos2d.h"

@implementation BezierCurveNode

- (id)initWithOrigin:(CGPoint)origin
       controlPoint1:(CGPoint)cp1
       controlPoint2:(CGPoint)cp2
         destination:(CGPoint)destination
               color:(ccColor3B)color
{
    self = [super init];
    if (self)
    {
        _origin = origin;
        _cp1 = cp1;
        _cp2 = cp2;
        _destination = destination;
        _color = color;
    }

    return self;
}

- (id)initWithOrigin:(CGPoint)origin config:(ccBezierConfig)config
{
    return [self initWithOrigin:origin
                  controlPoint1:config.controlPoint_1
                  controlPoint2:config.controlPoint_2
                    destination:config.endPosition
                          color:ccc3(120, 0, 120)];
}

- (void)visit
{
    [super visit];

    ccPointSize(10);
    ccDrawColor4F(_color.r / 255.0, _color.g / 255.0, _color.b / 255.0, 1.0f);
    ccDrawCircle(self.cp1, 5, 0, 20, NO);
    ccDrawCircle(self.cp2, 8, 0, 20, NO);
    ccDrawCubicBezier(self.origin, self.cp1, self.cp2, self.destination, 20);
}

@end