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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "scumm/util.h"
#include "common/util.h"
#include "common/textconsole.h"
namespace Scumm {
#pragma mark -
#pragma mark --- Utilities ---
#pragma mark -
void assertRange(int min, int value, int max, const char *desc) {
if (value < min || value > max) {
error("%s %d is out of bounds (%d,%d)", desc, value, min, max);
}
}
/**
* Convert an old style direction to a new style one (angle),
*/
int newDirToOldDir(int dir) {
if (dir >= 71 && dir <= 109)
return 1;
if (dir >= 109 && dir <= 251)
return 2;
if (dir >= 251 && dir <= 289)
return 0;
return 3;
}
/**
* Convert an new style (angle) direction to an old style one.
*/
int oldDirToNewDir(int dir) {
assert(0 <= dir && dir <= 3);
const int new_dir_table[4] = { 270, 90, 180, 0 };
return new_dir_table[dir];
}
/**
* Convert an angle to a simple direction.
*/
int toSimpleDir(int dirType, int dir) {
if (dirType) {
const int16 directions[] = { 22, 72, 107, 157, 202, 252, 287, 337 };
for (int i = 0; i < 7; i++)
if (dir >= directions[i] && dir <= directions[i+1])
return i+1;
} else {
const int16 directions[] = { 71, 109, 251, 289 };
for (int i = 0; i < 3; i++)
if (dir >= directions[i] && dir <= directions[i+1])
return i+1;
}
return 0;
}
/**
* Convert a simple direction to an angle.
*/
int fromSimpleDir(int dirType, int dir) {
if (dirType)
return dir * 45;
else
return dir * 90;
}
/**
* Normalize the given angle - that means, ensure it is positive, and
* change it to the closest multiple of 45 degree by abusing toSimpleDir.
*/
int normalizeAngle(int angle) {
int temp;
temp = (angle + 360) % 360;
return toSimpleDir(1, temp) * 45;
}
} // End of namespace Scumm
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