/*

 * Hedgewars-iOS, a Hedgewars port for iOS devices

 * Copyright (c) 2009-2012 Vittorio Giovara <vittorio.giovara@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.

 */

#include <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.width/2)/HW_zoomFactor()

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

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

#define HWYZ(x) (int)(screen.size.height-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);