/*

 *  CGPointUtils.h

 *  PinchMe

 *

 *  Created by Jeff LaMarche on 8/2/08.

 *  Copyright 2008 __MyCompanyName__. All rights reserved.

 *

 */

#import <CoreGraphics/CoreGraphics.h>

#define degreesToRadians(x) ( M_PI * x / 180.0)

#define radiansToDegrees(x) (180.0 * x / M_PI )

#define HWX(x) (int)(x-screen.size.height/2)/HW_zoomFactor()

#define HWY(x) (int)(screen.size.width-x)/HW_zoomFactor() + (IS_IPAD()?40:17.5)*HW_zoomLevel()/HW_zoomFactor()

#define HWXZ(x) (int)(x-screen.size.height/2)

#define HWYZ(x) (int)(screen.size.width-x)

CGFloat distanceBetweenPoints (CGPoint first, CGPoint second);

CGFloat angleBetweenPoints(CGPoint first, CGPoint second);

CGFloat angleBetweenLines(CGPoint line1Start, CGPoint line1End, CGPoint line2Start, CGPoint line2End);

CGFloat CGPointDot(CGPoint a, CGPoint b);

CGFloat CGPointLen(CGPoint a);

CGPoint CGPointSub(CGPoint a, CGPoint b);

CGFloat CGPointDist(CGPoint a, CGPoint b);

CGPoint CGPointNorm(CGPoint a);