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105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "scumm/util.h"
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#include "common/util.h"
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namespace Scumm {
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#pragma mark -
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#pragma mark --- Utilities ---
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#pragma mark -
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void assertRange(int min, int value, int max, const char *desc) {
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if (value < min || value > max) {
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error("%s %d is out of bounds (%d,%d)", desc, value, min, max);
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}
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}
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/**
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* Convert an old style direction to a new style one (angle),
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*/
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int newDirToOldDir(int dir) {
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if (dir >= 71 && dir <= 109)
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return 1;
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if (dir >= 109 && dir <= 251)
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return 2;
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if (dir >= 251 && dir <= 289)
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return 0;
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return 3;
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}
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/**
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* Convert an new style (angle) direction to an old style one.
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*/
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int oldDirToNewDir(int dir) {
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assert(0 <= dir && dir <= 3);
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const int new_dir_table[4] = { 270, 90, 180, 0 };
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return new_dir_table[dir];
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}
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/**
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* Convert an angle to a simple direction.
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*/
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int toSimpleDir(int dirType, int dir) {
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if (dirType) {
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const int16 directions[] = { 22, 72, 107, 157, 202, 252, 287, 337 };
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for (int i = 0; i < 7; i++)
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if (dir >= directions[i] && dir <= directions[i+1])
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return i+1;
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} else {
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const int16 directions[] = { 71, 109, 251, 289 };
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for (int i = 0; i < 3; i++)
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if (dir >= directions[i] && dir <= directions[i+1])
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return i+1;
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}
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return 0;
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}
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/**
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* Convert a simple direction to an angle.
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*/
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int fromSimpleDir(int dirType, int dir) {
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if (dirType)
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return dir * 45;
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else
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return dir * 90;
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}
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/**
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* Normalize the given angle - that means, ensure it is positive, and
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* change it to the closest multiple of 45 degree by abusing toSimpleDir.
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*/
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int normalizeAngle(int angle) {
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int temp;
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temp = (angle + 360) % 360;
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return toSimpleDir(1, temp) * 45;
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}
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} // End of namespace Scumm
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