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171 lines
11 KiB
C++
171 lines
11 KiB
C++
//-------------------------------------------------------------------------
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/*
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Copyright (C) 2010-2019 EDuke32 developers and contributors
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Copyright (C) 2019 sirlemonhead, Nuke.YKT
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This file is part of PCExhumed.
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PCExhumed is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License version 2
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as published by the Free Software Foundation.
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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.
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See the GNU General Public License for more details.
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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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//-------------------------------------------------------------------------
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#include "ns.h"
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#include "engine.h"
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#ifndef __WATCOMC__
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#include <cstdlib>
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#include <cmath>
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#else
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#include <stdlib.h>
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#endif
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BEGIN_PS_NS
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short AngTable[] = {0,0,0,0,1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,3,4,4,4,4,4,4,5,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,7,8,8,8,8,8,8,9,9,9,9,9,9,10,10,10,10,10,10,10,11,11,11,11,11,11,12,12,12,12,12,12,13,13,13,13,13,13,14,14,14,14,14,14,14,15,15,15,15,15,15,16,16,16,16,16,16,17,17,17,17,17,17,17,18,18,18,18,18,18,19,19,19,19,19,19,20,20,20,20,20,20,20,21,21,21,21,21,21,22,22,22,22,22,22,23,23,23,23,23,23,24,24,24,24,24,24,24,25,25,25,25,25,25,26,26,26,26,26,26,27,27,27,27,27,27,27,28,28,28,28,28,28,29,29,29,29,29,29,30,30,30,30,30,30,30,31,31,31,31,31,31,32,32,32,32,32,32,33,33,33,33,33,33,33,34,34,34,34,34,34,35,35,35,35,35,35,35,36,36,36,36,36,36,37,37,37,37,37,37,38,38,38,38,38,38,38,39,39,39,39,39,39,40,40,40,40,40,40,41,41,41,41,41,41,41,42,42,42,42,42,42,43,43,43,43,43,43,43,44,44,44,44,44,44,45,45,45,45,45,45,46,46,46,46,46,46,46,47,47,47,47,47,47,48,48,48,48,48,48,48,49,49,49,49,49,49,50,50,50,50,50,50,51,51,51,51,51,51,51,52,52,52,52,52,52,53,53,53,53,53,53,53,54,54,54,54,54,54,55,55,55,55,55,55,55,56,56,56,56,56,56,57,57,57,57,57,57,57,58,58,58,58,58,58,59,59,59,59,59,59,59,60,60,60,60,60,60,61,61,61,61,61,61,61,62,62,62,62,62,62,63,63,63,63,63,63,63,64,64,64,64,64,64,65,65,65,65,65,65,65,66,66,66,66,66,66,67,67,67,67,67,67,67,68,68,68,68,68,68,69,69,69,69,69,69,69,70,70,70,70,70,70,70,71,71,71,71,71,71,72,72,72,72,72,72,72,73,73,73,73,73,73,74,74,74,74,74,74,74,75,75,75,75,75,75,75,76,76,76,76,76,76,77,77,77,77,77,77,77,78,78,78,78,78,78,78,79,79,79,79,79,79,80,80,80,80,80,80,80,81,81,81,81,81,81,81,82,82,82,82,82,82,83,83,83,83,83,83,83,84,84,84,84,84,84,84,85,85,85,85,85,85,86,86,86,86,86,86,86,87,87,87,87,87,87,87,88,88,88,88,88,88,88,89,89,89,89,89,89,90,90,90,90,90,90,90,91,91,91,91,91,91,91,92,92,92,92,92,92,92,93,93,93,93,93,93,93,94,94,94,94,94,94,94,95,95,95,95,95,95,96,96,96,96,96,96,96,97,97,97,97,97,97,97,98,98,98,98,98,98,98,99,99,99,99,99,99,99,100,100,100,100,100,100,100,101,101,101,101,101,101,101,102,102,102,102,102,102,102,103,103,103,103,103,103,103,104,104,104,104,104,104,104,105,105,105,105,105,105,105,106,106,106,106,106,106,106,107,107,107,107,107,107,107,108,108,108,108,108,108,108,109,109,109,109,109,109,109,110,110,110,110,110,110,110,111,111,111,111,111,111,111,112,112,112,112,112,112,112,113,113,113,113,113,113,113,114,114,114,114,114,114,114,115,115,115,115,115,115,115,116,116,116,116,116,116,116,117,117,117,117,117,117,117,117,118,118,118,118,118,118,118,119,119,119,119,119,119,119,120,120,120,120,120,120,120,121,121,121,121,121,121,121,122,122,122,122,122,122,122,122,123,123,123,123,123,123,123,124,124,124,124,124,124,124,125,125,125,125,125,125,125,125,126,126,126,126,126,126,126,127,127,127,127,127,127,127,128,128,128,128,128,128,128,128,129,129,129,129,129,129,129,130,130,130,130,130,130,130,131,131,131,131,131,131,131,131,132,132,132,132,132,132,132,133,133,133,133,133,133,133,133,134,134,134,134,134,134,134,135,135,135,135,135,135,135,135,136,136,136,136,136,136,136,137,137,137,137,137,137,137,137,138,138,138,138,138,138,138,139,139,139,139,139,139,139,139,140,140,140,140,140,140,140,141,141,141,141,141,141,141,141,142,142,142,142,142,142,142,142,143,143,143,143,143,143,143,144,144,144,144,144,144,144,144,145,145,145,145,145,145,145,145,146,146,146,146,146,146,146,146,147,147,147,147,147,147,147,148,148,148,148,148,148,148,148,149,149,149,149,149,149,149,149,150,150,150,150,150,150,150,150,151,151,151,151,151,151,151,151,152,152,152,152,152,152,152,153,153,153,153,153,153,153,153,154,154,154,154,154,154,154,154,155,155,155,155,155,155,155,155,156,156,156,156,156,156,156,156,157,157,157,157,157,157,157,157,158,158,158,158,158,158,158,158,159,159,159,159,159,159,159,159,160,160,160,160,160,160,160,160,161,161,161,161,161,161,161,161,162,162,162,162,162,162,162,162,162,163,163,163,163,163,163,163,163,164,164,164,164,164,164,164,164,165,165,165,165,165,165,165,165,166,166,166,166,166,166,166,166,167,167,167,167,167,167,167,167,167,168,168,168,168,168,168,168,168,169,169,169,169,169,169,169,169,170,170,170,170,170,170,170,170,170,171,171,171,171,171,171,171,171,172,172,172,172,172,172,172,172,173,173,173,173,173,173,173,173,173,174,174,174,174,174,174,174,174,175,175,175,175,175,175,175,175,175,176,176,176,176,176,176,176,176,177,177,177,177,177,177,177,177,177,178,178,178,178,178,178,178,178,178,179,179,179,179,179,179,179,179,180,180,180,180,180,180,180,180,180,181,181,181,181,181,181,181,181,181,182,182,182,182,182,182,182,182,183,183,183,183,183,183,183,183,183,184,184,184,184,184,184,184,184,184,185,185,185,185,185,185,185,185,185,186,186,186,186,186,186,186,186,186,187,187,187,187,187,187,187,187,188,188,188,188,188,188,188,188,188,189,189,189,189,189,189,189,189,189,190,190,190,190,190,190,190,190,190,191,191,191,191,191,191,191,191,191,192,192,192,192,192,192,192,192,192,192,193,193,193,193,193,193,193,193,193,194,194,194,194,194,194,194,194,194,195,195,195,195,195,195,195,195,195,196,196,196,196,196,196,196,196,196,197,197,197,197,197,197,197,197,197,197,198,198,198,198,198,198,198,198,198,199,199,199,199,199,199,199,199,199,200,200,200,200,200,200,200,200,200,200,201,201,201,201,201,201,201,201,201,202,202,202,202,202,202,202,202,202,202,203,203,203,203,203,203,203,203,203,204,204,204,204,204,204,204,204,204,204,205,205,205,205,205,205,205,205,205,206,206,206,206,206,206,206,206,206,206,207,207,207,207,207,207,207,207,207,207,208,208,208,208,208,208,208,208,208,209,209,209,209,209,209,209,209,209,209,210,210,210,210,210,210,210,210,210,210,211,211,211,211,211,211,211,211,211,211,212,212,212,212,212,212,212,212,212,212,213,213,213,213,213,213,213,213,213,213,214,214,214,214,214,214,214,214,214,214,215,215,215,215,215,215,215,215,215,215,216,216,216,216,216,216,216,216,216,216,217,217,217,217,217,217,217,217,217,217,218,218,218,218,218,218,218,218,218,218,219,219,219,219,219,219,219,219,219,219,219,220,220,220,220,220,220,220,220,220,220,221,221,221,221,221,221,221,221,221,221,222,222,222,222,222,222,222,222,222,222,222,223,223,223,223,223,223,223,223,223,223,224,224,224,224,224,224,224,224,224,224,224,225,225,225,225,225,225,225,225,225,225,226,226,226,226,226,226,226,226,226,226,226,227,227,227,227,227,227,227,227,227,227,228,228,228,228,228,228,228,228,228,228,228,229,229,229,229,229,229,229,229,229,229,229,230,230,230,230,230,230,230,230,230,230,230,231,231,231,231,231,231,231,231,231,231,231,232,232,232,232,232,232,232,232,232,232,232,233,233,233,233,233,233,233,233,233,233,233,234,234,234,234,234,234,234,234,234,234,234,235,235,235,235,235,235,235,235,235,235,235,236,236,236,236,236,236,236,236,236,236,236,237,237,237,237,237,237,237,237,237,237,237,238,238,238,238,238,238,238,238,238,238,238,238,239,239,239,239,239,239,239,239,239,239,239,240,240,240,240,240,240,240,240,240,240,240,240,241,241,241,241,241,241,241,241,241,241,241,242,242,242,242,242,242,242,242,242,242,242,242,243,243,243,243,243,243,243,243,243,243,243,244,244,244,244,244,244,244,244,244,244,244,244,245,245,245,245,245,245,245,245,245,245,245,245,246,246,246,246,246,246,246,246,246,246,246,246,247,247,247,247,247,247,247,247,247,247,247,248,248,248,248,248,248,248,248,248,248,248,248,249,249,249,249,249,249,249,249,249,249,249,249,249,250,250,250,250,250,250,250,250,250,250,250,250,251,251,251,251,251,251,251,251,251,251,251,251,252,252,252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,253,253,253,253,253,253,254,254,254,254,254,254,254,254,254,254,254,254,254,255,255,255,255,255,255,255,255,255,255,255,255,256,256,256,256,256,256};
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int GetMyAngle(int x, int y)
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{
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int ebx = -x;
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int esi = y << 11;
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int ecx = y;
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int edx = y;
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if (ebx >= 0)
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{
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// left path
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edx = ebx << 11;
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if (y >= 0)
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{
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if (ebx == y) {
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return 768;
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}
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else // loc_2F318:
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{
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if (y > ebx)
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{
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return (AngTable[(edx / y) & kAngleMask] + 512) & kAngleMask;
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}
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else
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{
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// loc_2F33C:
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return ((512 - AngTable[(esi / ebx) & kAngleMask]) + 512) & kAngleMask;
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}
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}
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}
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else
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{
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// loc_2F35D:
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ecx = -y;
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if (ebx == ecx) {
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return 1280;
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}
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else if (ebx <= ecx)
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{
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return ((1024 - AngTable[(edx / ecx) & kAngleMask]) + 512) & kAngleMask;
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}
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else
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{
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edx = ecx << 11;
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return (AngTable[(edx / ebx) & kAngleMask] + 1024) & kAngleMask;
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}
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}
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}
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else
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{
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if (edx >= 0)
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{
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ebx = -ebx;
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if (ebx == edx) {
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return 256;
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}
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else if (ebx > edx)
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{
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return (AngTable[(esi / ebx) & kAngleMask] + 2048) & kAngleMask;
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}
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else
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{
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edx = ebx << 11;
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return ((2048 - AngTable[(edx / ecx) & kAngleMask]) + 512) & kAngleMask;
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}
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}
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else
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{
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ebx = -ebx;
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ecx = -ecx;
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if (ebx == ecx) {
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return 1792;
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}
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else if (ebx >= ecx)
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{
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edx = ecx << 11;
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return ((1536 - AngTable[(edx / ebx) & kAngleMask]) + 512) & kAngleMask;
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}
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else
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{
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edx = ebx << 11;
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return (AngTable[(edx / ecx) & kAngleMask] + 1536) & kAngleMask;
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}
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}
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}
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}
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// 100% done
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int AngleDiff(short a, short b)
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{
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int diff = (b - a) & kAngleMask;
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if (diff > 1024) {
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diff = 2048 - diff;
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}
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return diff;
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}
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// unused
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int AnglePick(short a, short b)
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{
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int nRet = b;
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if (AngleDiff(a, b) > 512)
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{
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nRet ^= 0x400;
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}
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return nRet;
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}
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int AngleDelta(int a, int b, int c)
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{
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int diff = b - a;
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if (diff >= 0)
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{
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if (diff > 1024) {
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diff = -(2048 - diff);
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}
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}
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else if (diff < -1024)
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{
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diff += 2048;
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}
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if (abs(diff) > c)
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{
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if (diff < 0) {
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return -diff;
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}
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diff = c;
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}
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return diff;
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}
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END_PS_NS
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