//
//  MyPoint.m
//  B-spline
//
//  Created by Alexander Powell on Tue Aug 27 2002.
//  Copyright (c) 2002 __MyCompanyName__. All rights reserved.
//

#import "MyPoint.h"


@implementation MyPoint

- (id)init
{
    return [self initWithX: 0.0f y: 0.0f z: 0.0f];
}

- (id)initWithX:(double)newX y:(double)newY z:(double)newZ
{
    if (self = [super init])
    {
        x = newX;
        y = newY;
        z = newZ;
        return self;
    }
    return nil;
}

- (void)negate
{
    x = -x;
    y = -y;
    z = -z;
}

- (void)normalize
{
	double length;
    
	// Calculate The Length Of The Vector
	length = (double)sqrt((x*x) + (y*y) + (z*z));

	if(length == 0.0f)						// Prevents Divide By 0 Error
		length = 1.0f;

	x /= length;
	y /= length;
    z /= length;
}

- (double)x
{
    return x;
}

- (double)y
{
    return y;
}

- (double)z
{
    return z;
}

- (void)setX:(double)newX
{
    x = newX;
}

- (void)setY:(double)newY
{
    y = newY;
}

- (void)setZ:(double)newZ
{
    z = newZ;
}

- (NSString *)description
{
    return [NSString stringWithFormat: @"(%f, %f, %f)", x, y, z];
}

@end