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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.
*
*/
#include "titanic/star_control/matrix_transform.h"
#include "titanic/star_control/fpose.h"
#include "common/textconsole.h"
namespace Titanic {
void CMatrixTransform::setup(double val1, double x, double y, double z) {
_field0 = val1;
_vector._x = x;
_vector._y = y;
_vector._z = z;
}
void CMatrixTransform::copyFrom(const CMatrixTransform &src) {
_field0 = src._field0;
_vector = src._vector;
}
double CMatrixTransform::fn1() const {
return _vector._x * _vector._x + _vector._y * _vector._y +
_vector._z * _vector._z + _field0 * _field0;
}
double CMatrixTransform::fn2(const CMatrixTransform &src) {
return _field0 * src._field0 + _vector._x * src._vector._x
+ _vector._y * src._vector._y + _vector._z * src._vector._z;
}
CMatrixTransform CMatrixTransform::resize(double factor) const {
CMatrixTransform dest;
dest.setup(_field0 * factor, _vector._x * factor, _vector._y * factor,
_vector._z * factor);
return dest;
}
void CMatrixTransform::fn4(const FMatrix &m) {
double total = m._row1._x + m._row3._z + m._row2._y + 1.0;
if (total <= 0.00001) {
total = m._row3._z;
if (m._row1._x <= m._row3._z) {
if (m._row2._y > total)
total = m._row2._y;
} else if (m._row1._x > total) {
total = m._row1._x;
}
if (total == m._row1._x) {
double val1 = sqrt(m._row1._x - -1.0 - m._row2._y - m._row3._z);
double val2 = 0.5 / val1;
_vector._x = val1 * 0.5;
_field0 = (m._row2._z - m._row3._y) * val2;
_vector._y = (m._row2._x + m._row1._y) * val2;
_vector._z = (m._row3._x + m._row1._z) * val2;
} else if (total == m._row2._y) {
double val1 = sqrt(m._row2._y - -1.0 - m._row3._z - m._row1._x);
double val2 = 0.5 / val1;
_vector._y = val1 * 0.5;
_field0 = (m._row3._x - m._row1._z) * val2;
_vector._z = (m._row3._y + m._row2._z) * val2;
_vector._x = (m._row2._x + m._row1._y) * val2;
} else if (total == m._row3._z) {
double val1 = sqrt(m._row3._z - -1.0 - m._row1._x - m._row2._y);
double val2 = 0.5 / val1;
_vector._z = val1 * 0.5;
_field0 = (m._row1._y - m._row2._x) * val2;
_vector._x = (m._row3._x + m._row1._z) * val2;
_vector._y = (m._row3._y + m._row2._z) * val2;
}
} else {
double val1 = 0.5 / sqrt(total);
_field0 = sqrt(total) * 0.5;
_vector._x = (m._row2._z - m._row3._y) * val1;
_vector._y = (m._row3._x - m._row1._z) * val1;
_vector._z = (m._row1._y - m._row2._x) * val1;
}
}
CMatrixTransform CMatrixTransform::fn5(double percent, const CMatrixTransform &src) {
CMatrixTransform sub1 = *this;
CMatrixTransform sub2, sub4;
CMatrixTransform dest;
double val1 = sub1.fn2(src);
if (val1 < 0.0) {
val1 = -val1;
sub2.setup(-sub1._field0, -sub1._vector._x, -sub1._vector._y, -sub1._vector._z);
sub1 = sub2;
}
if (val1 + 1.0 <= 0.00001) {
dest._vector._x = -sub1._vector._y;
dest._vector._y = sub1._vector._x;
dest._vector._z = -sub1._field0;
dest._field0 = sub1._vector._z;
double sin1 = sin(percent * M_PI);
double sin2 = sin((0.5 - percent) * M_PI);
dest._vector._x = sin1 * dest._vector._x + sub1._vector._x * sin2;
dest._vector._y = sub1._vector._y * sin2 + sub1._vector._x * sin1;
dest._vector._z = sin1 * -sub1._field0 + sub1._vector._z * sin2;
return dest;
}
CMatrixTransform t1, t2;
double val2;
if (1.0 - val1 <= 0.00001) {
val2 = 1.0 - percent;
t1 = src.resize(percent);
} else {
double cosVal = acos(val1);
double sinVal = sin(cosVal);
val2 = sin((1.0 - percent) * cosVal) / sinVal;
t1 = src.resize(sin(cosVal * percent) / sinVal);
}
t2 = sub1.resize(val2);
dest.setup(t2._field0 + t1._field0, t1._vector._x + t2._vector._x,
t1._vector._y + t2._vector._y, t1._vector._z + t2._vector._z);
return dest;
}
} // End of namespace Titanic
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