diff options
Diffstat (limited to 'src/tables.c')
| -rw-r--r-- | src/tables.c | 142 |
1 files changed, 123 insertions, 19 deletions
diff --git a/src/tables.c b/src/tables.c index ffafeb7e..480d1a6d 100644 --- a/src/tables.c +++ b/src/tables.c @@ -38,33 +38,37 @@ // //----------------------------------------------------------------------------- - - - - #include "tables.h" +// to get a global angle from cartesian coordinates, the coordinates are +// flipped until they are in the first octant of the coordinate system, then +// the y (<=x) is scaled and divided by x to get a tangent (slope) value +// which is looked up in the tantoangle[] table. The +1 size is to handle +// the case when x==y without additional checking. - - -int -SlopeDiv -( unsigned num, - unsigned den) +int SlopeDiv(unsigned int num, unsigned int den) { - unsigned ans; + unsigned ans; if (den < 512) - return SLOPERANGE; - - ans = (num<<3)/(den>>8); + { + return SLOPERANGE; + } + else + { + ans = (num << 3) / (den >> 8); - return ans <= SLOPERANGE ? ans : SLOPERANGE; + if (ans <= SLOPERANGE) + { + return ans; + } + else + { + return SLOPERANGE; + } + } } - - - const int finetangent[4096] = { -170910304,-56965752,-34178904,-24413316,-18988036,-15535599,-13145455,-11392683, @@ -1866,7 +1870,7 @@ const int finesine[10240] = 65534,65535,65535,65535,65535,65535,65535,65535 }; - +const fixed_t *finecosine = &finesine[FINEANGLES/4]; const angle_t tantoangle[2049] = { @@ -2129,3 +2133,103 @@ const angle_t tantoangle[2049] = 536870912 }; +// Now where did these came from? +const byte gammatable[5][256] = +{ + { + 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, + 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, + 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48, + 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64, + 65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80, + 81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96, + 97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112, + 113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128, + 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, + 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, + 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, + 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191, + 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207, + 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223, + 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239, + 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255 + }, + + { + 2,4,5,7,8,10,11,12,14,15,16,18,19,20,21,23, + 24,25,26,27,29,30,31,32,33,34,36,37,38,39,40,41, + 42,44,45,46,47,48,49,50,51,52,54,55,56,57,58,59, + 60,61,62,63,64,65,66,67,69,70,71,72,73,74,75,76, + 77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92, + 93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108, + 109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124, + 125,126,127,128,129,129,130,131,132,133,134,135,136,137,138,139, + 140,141,142,143,144,145,146,147,148,148,149,150,151,152,153,154, + 155,156,157,158,159,160,161,162,163,163,164,165,166,167,168,169, + 170,171,172,173,174,175,175,176,177,178,179,180,181,182,183,184, + 185,186,186,187,188,189,190,191,192,193,194,195,196,196,197,198, + 199,200,201,202,203,204,205,205,206,207,208,209,210,211,212,213, + 214,214,215,216,217,218,219,220,221,222,222,223,224,225,226,227, + 228,229,230,230,231,232,233,234,235,236,237,237,238,239,240,241, + 242,243,244,245,245,246,247,248,249,250,251,252,252,253,254,255 + }, + + { + 4,7,9,11,13,15,17,19,21,22,24,26,27,29,30,32, + 33,35,36,38,39,40,42,43,45,46,47,48,50,51,52,54, + 55,56,57,59,60,61,62,63,65,66,67,68,69,70,72,73, + 74,75,76,77,78,79,80,82,83,84,85,86,87,88,89,90, + 91,92,93,94,95,96,97,98,100,101,102,103,104,105,106,107, + 108,109,110,111,112,113,114,114,115,116,117,118,119,120,121,122, + 123,124,125,126,127,128,129,130,131,132,133,133,134,135,136,137, + 138,139,140,141,142,143,144,144,145,146,147,148,149,150,151,152, + 153,153,154,155,156,157,158,159,160,160,161,162,163,164,165,166, + 166,167,168,169,170,171,172,172,173,174,175,176,177,178,178,179, + 180,181,182,183,183,184,185,186,187,188,188,189,190,191,192,193, + 193,194,195,196,197,197,198,199,200,201,201,202,203,204,205,206, + 206,207,208,209,210,210,211,212,213,213,214,215,216,217,217,218, + 219,220,221,221,222,223,224,224,225,226,227,228,228,229,230,231, + 231,232,233,234,235,235,236,237,238,238,239,240,241,241,242,243, + 244,244,245,246,247,247,248,249,250,251,251,252,253,254,254,255 + }, + + { + 8,12,16,19,22,24,27,29,31,34,36,38,40,41,43,45, + 47,49,50,52,53,55,57,58,60,61,63,64,65,67,68,70, + 71,72,74,75,76,77,79,80,81,82,84,85,86,87,88,90, + 91,92,93,94,95,96,98,99,100,101,102,103,104,105,106,107, + 108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123, + 124,125,126,127,128,129,130,131,132,133,134,135,135,136,137,138, + 139,140,141,142,143,143,144,145,146,147,148,149,150,150,151,152, + 153,154,155,155,156,157,158,159,160,160,161,162,163,164,165,165, + 166,167,168,169,169,170,171,172,173,173,174,175,176,176,177,178, + 179,180,180,181,182,183,183,184,185,186,186,187,188,189,189,190, + 191,192,192,193,194,195,195,196,197,197,198,199,200,200,201,202, + 202,203,204,205,205,206,207,207,208,209,210,210,211,212,212,213, + 214,214,215,216,216,217,218,219,219,220,221,221,222,223,223,224, + 225,225,226,227,227,228,229,229,230,231,231,232,233,233,234,235, + 235,236,237,237,238,238,239,240,240,241,242,242,243,244,244,245, + 246,246,247,247,248,249,249,250,251,251,252,253,253,254,254,255 + }, + + + { + 16,23,28,32,36,39,42,45,48,50,53,55,57,60,62,64, + 66,68,69,71,73,75,76,78,80,81,83,84,86,87,89,90, + 92,93,94,96,97,98,100,101,102,103,105,106,107,108,109,110, + 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,128, + 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, + 143,144,145,146,147,148,149,150,150,151,152,153,154,155,155,156, + 157,158,159,159,160,161,162,163,163,164,165,166,166,167,168,169, + 169,170,171,172,172,173,174,175,175,176,177,177,178,179,180,180, + 181,182,182,183,184,184,185,186,187,187,188,189,189,190,191,191, + 192,193,193,194,195,195,196,196,197,198,198,199,200,200,201,202, + 202,203,203,204,205,205,206,207,207,208,208,209,210,210,211,211, + 212,213,213,214,214,215,216,216,217,217,218,219,219,220,220,221, + 221,222,223,223,224,224,225,225,226,227,227,228,228,229,229,230, + 230,231,232,232,233,233,234,234,235,235,236,236,237,237,238,239, + 239,240,240,241,241,242,242,243,243,244,244,245,245,246,246,247, + 247,248,248,249,249,250,250,251,251,252,252,253,254,254,255,255 + } +}; + |