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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef ENABLE_HE
#include "scumm/he/intern_he.h"
#include "scumm/scumm.h"
#include "scumm/util.h"
namespace Scumm {
static int _scummMathSineTable[181] = {
0, 1745, 3489, 5233, 6975, 8715, 10452, 12186, 13917,
15643, 17364, 19080, 20791, 22495, 24192, 25881, 27563, 29237,
30901, 32556, 34202, 35836, 37460, 39073, 40673, 42261, 43837,
45399, 46947, 48480, 50000, 51503, 52991, 54463, 55919, 57357,
58778, 60181, 61656, 62932, 64278, 65605, 66913, 68199, 69465,
70710, 71933, 73135, 74314, 75470, 76604, 77714, 78801, 79863,
80901, 81915, 82903, 83867, 84804, 85716, 86602, 87461, 88294,
89100, 89879, 90630, 91354, 92050, 92718, 93358, 93969, 94551,
95105, 95630, 96126, 96592, 97029, 97437, 97814, 98162, 98480,
98768, 99026, 99254, 99452, 99619, 99756, 99862, 99939, 99984,
100000, 99984, 99939, 99862, 99756, 99619, 99452, 99254, 99026,
98768, 98480, 98162, 97814, 97437, 97029, 96592, 96126, 95630,
95105, 94551, 93969, 93358, 92718, 92050, 91354, 90630, 89879,
89100, 88294, 87461, 86602, 85716, 84804, 83867, 82903, 81915,
80901, 79863, 78801, 77714, 76604, 75470, 74314, 73135, 71933,
70710, 69465, 68199, 66913, 65605, 64278, 62932, 61656, 60181,
58778, 57357, 55919, 54463, 52991, 51503, 50000, 48480, 46947,
45399, 43837, 42261, 40673, 39073, 37460, 35836, 34202, 32556,
30901, 29237, 27563, 25881, 24192, 22495, 20791, 19080, 17364,
15643, 13917, 12186, 10452, 8715, 6975, 5233, 3489, 1745,
0
};
int ScummEngine_v90he::scummMathSin(int angle) {
bool positive;
if (angle) {
positive = (angle > 0) ? 1 : 0;
angle %= 360;
angle = abs(angle);
if (angle > 180) {
positive = !positive;
angle -= 180;
}
if (positive) {
return _scummMathSineTable[angle];
} else {
return -(_scummMathSineTable[angle]);
}
}
return 0;
}
int ScummEngine_v90he::scummMathCos(int angle) {
bool positive;
if (angle += 90) {
positive = (angle > 0) ? 1 : 0;
angle %= 360;
angle = abs(angle);
if (angle > 180) {
positive = !positive;
angle -= 180;
}
if (positive) {
return _scummMathSineTable[angle];
} else {
return -(_scummMathSineTable[angle]);
}
}
return 0;
}
int ScummEngine_v90he::scummMathSqrt(int value) {
int32 s1, s2, x;
x = (int32)abs(value);
if (x < 2)
return x;
s1 = x;
s2 = 2;
do {
s1 >>= 1;
s2 <<= 1;
} while (s1 > s2);
do {
s1 = s2;
s2 = (x / s1 + s1) / 2;
} while (s1 > s2);
return s2;
}
int ScummEngine_v90he::scummMathDist2D(int x1, int y1, int x2, int y2) {
int dx, dy;
dx = x1 - x2;
dx *= dx;
dy = y1 - y2;
dy *= dy;
return scummMathSqrt(dx + dy);
}
int ScummEngine_v90he::scummMathAngleFromDelta(int dx, int dy) {
int angle = (int)((atan2((double)dy, (double)dx) * 180.0) / M_PI);
if (angle < 0) {
angle = 360 + angle;
}
if (angle == 360)
angle = 0;
return angle;
}
int ScummEngine_v90he::scummMathAngleOfLineSegment(int x1, int y1, int x2, int y2) {
return scummMathAngleFromDelta((x2 - x1), (y2 - y1));
}
} // End of namespace Scumm
#endif // ENABLE_HE
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