Remastered-Collection/REDALERT/FACE.H

//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code 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, 
// either version 3 of the License, or (at your option) any later version.

// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed 
// in the hope that it will be useful, but with permitted additional restrictions 
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT 
// distributed with this program. You should have received a copy of the 
// GNU General Public License along with permitted additional restrictions 
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection

/* $Header: /CounterStrike/FACE.H 1     3/03/97 10:24a Joe_bostic $ */
/***********************************************************************************************
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : Command & Conquer                                            *
 *                                                                                             *
 *                    File Name : FACE.H                                                       *
 *                                                                                             *
 *                   Programmer : Joe L. Bostic                                                *
 *                                                                                             *
 *                   Start Date : 03/08/96                                                     *
 *                                                                                             *
 *                  Last Update : March 8, 1996 [JLB]                                          *
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

#ifndef FACE_H
#define FACE_H

// Enumerations of the facing values returned from Desired_Facing().
typedef enum DirType : unsigned char {
	DIR_MIN=0,
	DIR_N=0,
	DIR_NE=1<<5,
	DIR_E=2<<5,
	DIR_SE=3<<5,
	DIR_S=4<<5,
	DIR_SW=5<<5,
	DIR_W=6<<5,
	DIR_NW=7<<5,
	DIR_MAX=255
} DirType;

// Operators that allow simple math with DirType.
inline DirType operator + (DirType f1, DirType f2)
{
	return (DirType)(((int)f1 + (int)f2) & 0x00FF);
}
inline DirType operator + (DirType f1, int f2)
{
	return (DirType)(((int)f1 + (int)f2) & 0x00FF);
}
inline DirType operator - (DirType f1, DirType f2)
{
	return (DirType)(((int)f1 - (int)f2) & 0x00FF);
}
inline DirType operator - (DirType f1, int f2)
{
	return (DirType)(((int)f1 - (int)f2) & 0x00FF);
}


// Function prototypes.
DirType Desired_Facing8(int x1, int y1, int x2, int y2);
DirType Desired_Facing256(int srcx, int srcy, int dstx, int dsty);

#endif