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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.
*
* Additional copyright for this file:
* Copyright (C) 1995-1997 Presto Studios, Inc.
*
* 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.
*
*/
#include "common/random.h"
#include "common/util.h"
#include "pegasus/util.h"
namespace Pegasus {
IDObject::IDObject(const tMM32BitID id) {
_objectID = id;
}
IDObject::~IDObject() {
}
tMM32BitID IDObject::getObjectID() const {
return _objectID;
}
int operator==(const IDObject &arg1, const IDObject &arg2) {
return arg1.getObjectID() == arg2.getObjectID();
}
int operator!=(const IDObject &arg1, const IDObject &arg2) {
return arg1.getObjectID() != arg2.getObjectID();
}
FunctionPtr::FunctionPtr() {
_function = 0;
_functionArg = 0;
}
FunctionPtr::~FunctionPtr() {
}
void FunctionPtr::setFunctionPtr(tFunctionPtr function, void *functionArg) {
_function = function;
_functionArg = functionArg;
}
void FunctionPtr::callFunction() {
if (_function != 0)
(*_function)(this, _functionArg);
}
inline int32 pegasusRound(const int32 a, const int32 b) {
if (b < 0)
if (a < 0)
return -((a - (-b >> 1)) / -b);
else
return -((a + (-b >> 1)) / -b);
else
if (a < 0)
return (a - (b >> 1)) / b;
else
return (a + (b >> 1)) / b;
}
int32 linearInterp(const int32 start1, const int32 stop1, const int32 current1, const int32 start2, const int32 stop2) {
if (start2 == stop2)
return start2;
else
return start2 + pegasusRound((current1 - start1) * (stop2 - start2), (stop1 - start1));
}
void shuffleArray(int32 *arr, int32 count, Common::RandomSource &random) {
if (count > 1) {
for (int32 i = 1; i < count; ++i) {
int32 j = random.getRandomNumber(i);
if (j != i)
SWAP(arr[i], arr[j]);
}
}
}
} // End of namespace Pegasus
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