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