ref: 0d66c828824abe9951af3fcfba6edc42279572bf
dir: /game/q_shared.c/
/* Copyright (C) 1997-2001 Id Software, Inc. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define GAME_INCLUDE #include <u.h> #include <libc.h> #include <stdio.h> #include "../dat.h" #include "../fns.h" #define DEG2RAD( a ) ( a * M_PI ) / 180.0F vec3_t vec3_origin = {0,0,0}; //============================================================================ #ifdef _WIN32 #pragma optimize( "", off ) #endif void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees ) { float m[3][3]; float im[3][3]; float zrot[3][3]; float tmpmat[3][3]; float rot[3][3]; int i; vec3_t vr, vup, vf; vf[0] = dir[0]; vf[1] = dir[1]; vf[2] = dir[2]; PerpendicularVector( vr, dir ); CrossProduct( vr, vf, vup ); m[0][0] = vr[0]; m[1][0] = vr[1]; m[2][0] = vr[2]; m[0][1] = vup[0]; m[1][1] = vup[1]; m[2][1] = vup[2]; m[0][2] = vf[0]; m[1][2] = vf[1]; m[2][2] = vf[2]; memcpy( im, m, sizeof( im ) ); im[0][1] = m[1][0]; im[0][2] = m[2][0]; im[1][0] = m[0][1]; im[1][2] = m[2][1]; im[2][0] = m[0][2]; im[2][1] = m[1][2]; memset( zrot, 0, sizeof( zrot ) ); zrot[0][0] = zrot[1][1] = zrot[2][2] = 1.0F; zrot[0][0] = cos( DEG2RAD( degrees ) ); zrot[0][1] = sin( DEG2RAD( degrees ) ); zrot[1][0] = -sin( DEG2RAD( degrees ) ); zrot[1][1] = cos( DEG2RAD( degrees ) ); R_ConcatRotations( m, zrot, tmpmat ); R_ConcatRotations( tmpmat, im, rot ); for ( i = 0; i < 3; i++ ) { dst[i] = rot[i][0] * point[0] + rot[i][1] * point[1] + rot[i][2] * point[2]; } } #ifdef _WIN32 #pragma optimize( "", on ) #endif void AngleVectors (vec3_t angles, vec3_t forward, vec3_t right, vec3_t up) { float angle; static float sr, sp, sy, cr, cp, cy; // static to help MS compiler fp bugs angle = angles[YAW] * (M_PI*2 / 360); sy = sin(angle); cy = cos(angle); angle = angles[PITCH] * (M_PI*2 / 360); sp = sin(angle); cp = cos(angle); angle = angles[ROLL] * (M_PI*2 / 360); sr = sin(angle); cr = cos(angle); if (forward) { forward[0] = cp*cy; forward[1] = cp*sy; forward[2] = -sp; } if (right) { right[0] = (-1*sr*sp*cy+-1*cr*-sy); right[1] = (-1*sr*sp*sy+-1*cr*cy); right[2] = -1*sr*cp; } if (up) { up[0] = (cr*sp*cy+-sr*-sy); up[1] = (cr*sp*sy+-sr*cy); up[2] = cr*cp; } } void ProjectPointOnPlane( vec3_t dst, const vec3_t p, const vec3_t normal ) { float d; vec3_t n; float inv_denom; inv_denom = 1.0F / DotProduct( normal, normal ); d = DotProduct( normal, p ) * inv_denom; n[0] = normal[0] * inv_denom; n[1] = normal[1] * inv_denom; n[2] = normal[2] * inv_denom; dst[0] = p[0] - d * n[0]; dst[1] = p[1] - d * n[1]; dst[2] = p[2] - d * n[2]; } /* ** assumes "src" is normalized */ void PerpendicularVector( vec3_t dst, const vec3_t src ) { int pos; int i; float minelem = 1.0F; vec3_t tempvec; /* ** find the smallest magnitude axially aligned vector */ for ( pos = 0, i = 0; i < 3; i++ ) { if ( fabs( src[i] ) < minelem ) { pos = i; minelem = fabs( src[i] ); } } tempvec[0] = tempvec[1] = tempvec[2] = 0.0F; tempvec[pos] = 1.0F; /* ** project the point onto the plane defined by src */ ProjectPointOnPlane( dst, tempvec, src ); /* ** normalize the result */ VectorNormalize( dst ); } /* ================ R_ConcatRotations ================ */ void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3]) { out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] + in1[0][2] * in2[2][0]; out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] + in1[0][2] * in2[2][1]; out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] + in1[0][2] * in2[2][2]; out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] + in1[1][2] * in2[2][0]; out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] + in1[1][2] * in2[2][1]; out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] + in1[1][2] * in2[2][2]; out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] + in1[2][2] * in2[2][0]; out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] + in1[2][2] * in2[2][1]; out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] + in1[2][2] * in2[2][2]; } /* ================ R_ConcatTransforms ================ */ void R_ConcatTransforms (float in1[3][4], float in2[3][4], float out[3][4]) { out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] + in1[0][2] * in2[2][0]; out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] + in1[0][2] * in2[2][1]; out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] + in1[0][2] * in2[2][2]; out[0][3] = in1[0][0] * in2[0][3] + in1[0][1] * in2[1][3] + in1[0][2] * in2[2][3] + in1[0][3]; out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] + in1[1][2] * in2[2][0]; out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] + in1[1][2] * in2[2][1]; out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] + in1[1][2] * in2[2][2]; out[1][3] = in1[1][0] * in2[0][3] + in1[1][1] * in2[1][3] + in1[1][2] * in2[2][3] + in1[1][3]; out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] + in1[2][2] * in2[2][0]; out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] + in1[2][2] * in2[2][1]; out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] + in1[2][2] * in2[2][2]; out[2][3] = in1[2][0] * in2[0][3] + in1[2][1] * in2[1][3] + in1[2][2] * in2[2][3] + in1[2][3]; } //============================================================================ float Q_fabs (float f) { /* if (f >= 0) return f; return -f; */ int tmp = * ( int * ) &f; tmp &= 0x7FFFFFFF; return * ( float * ) &tmp; } /* =============== LerpAngle =============== */ float LerpAngle (float a2, float a1, float frac) { if (a1 - a2 > 180) a1 -= 360; if (a1 - a2 < -180) a1 += 360; return a2 + frac * (a1 - a2); } float anglemod(float a) { /* if (a >= 0) a -= 360*(int)(a/360); else a += 360*( 1 + (int)(-a/360) ); */ a = (360.0/65536) * ((int)(a*(65536/360.0)) & 65535); return a; } int i; vec3_t corners[2]; // this is the slow, general version int BoxOnPlaneSide2 (vec3_t emins, vec3_t emaxs, struct cplane_s *p) { int i; float dist1, dist2; int sides; vec3_t corners[2]; for (i=0 ; i<3 ; i++) { if (p->normal[i] < 0) { corners[0][i] = emins[i]; corners[1][i] = emaxs[i]; } else { corners[1][i] = emins[i]; corners[0][i] = emaxs[i]; } } dist1 = DotProduct (p->normal, corners[0]) - p->dist; dist2 = DotProduct (p->normal, corners[1]) - p->dist; sides = 0; if (dist1 >= 0) sides = 1; if (dist2 < 0) sides |= 2; return sides; } /* ================== BoxOnPlaneSide Returns 1, 2, or 1 + 2 ================== */ int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct cplane_s *p) { float dist1, dist2; int sides; // fast axial cases if (p->type < 3) { if (p->dist <= emins[p->type]) return 1; if (p->dist >= emaxs[p->type]) return 2; return 3; } // general case switch (p->signbits) { case 0: dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2]; dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2]; break; case 1: dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2]; dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2]; break; case 2: dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2]; dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2]; break; case 3: dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2]; dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2]; break; case 4: dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2]; dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2]; break; case 5: dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2]; dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2]; break; case 6: dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2]; dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2]; break; case 7: dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2]; dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2]; break; default: dist1 = dist2 = 0; // shut up compiler assert( 0 ); break; } sides = 0; if (dist1 >= p->dist) sides = 1; if (dist2 < p->dist) sides |= 2; assert( sides != 0 ); return sides; } void ClearBounds (vec3_t mins, vec3_t maxs) { mins[0] = mins[1] = mins[2] = 99999; maxs[0] = maxs[1] = maxs[2] = -99999; } void AddPointToBounds (vec3_t v, vec3_t mins, vec3_t maxs) { int i; vec_t val; for (i=0 ; i<3 ; i++) { val = v[i]; if (val < mins[i]) mins[i] = val; if (val > maxs[i]) maxs[i] = val; } } int VectorCompare (vec3_t v1, vec3_t v2) { if (v1[0] != v2[0] || v1[1] != v2[1] || v1[2] != v2[2]) return 0; return 1; } vec_t VectorNormalize (vec3_t v) { float length, ilength; length = v[0]*v[0] + v[1]*v[1] + v[2]*v[2]; length = sqrt (length); // FIXME if (length) { ilength = 1/length; v[0] *= ilength; v[1] *= ilength; v[2] *= ilength; } return length; } vec_t VectorNormalize2 (vec3_t v, vec3_t out) { float length, ilength; length = v[0]*v[0] + v[1]*v[1] + v[2]*v[2]; length = sqrt (length); // FIXME if (length) { ilength = 1/length; out[0] = v[0]*ilength; out[1] = v[1]*ilength; out[2] = v[2]*ilength; } return length; } void VectorMA (vec3_t veca, float scale, vec3_t vecb, vec3_t vecc) { vecc[0] = veca[0] + scale*vecb[0]; vecc[1] = veca[1] + scale*vecb[1]; vecc[2] = veca[2] + scale*vecb[2]; } vec_t _DotProduct (vec3_t v1, vec3_t v2) { return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2]; } void _VectorSubtract (vec3_t veca, vec3_t vecb, vec3_t out) { out[0] = veca[0]-vecb[0]; out[1] = veca[1]-vecb[1]; out[2] = veca[2]-vecb[2]; } void _VectorAdd (vec3_t veca, vec3_t vecb, vec3_t out) { out[0] = veca[0]+vecb[0]; out[1] = veca[1]+vecb[1]; out[2] = veca[2]+vecb[2]; } void _VectorCopy (vec3_t in, vec3_t out) { out[0] = in[0]; out[1] = in[1]; out[2] = in[2]; } void CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross) { cross[0] = v1[1]*v2[2] - v1[2]*v2[1]; cross[1] = v1[2]*v2[0] - v1[0]*v2[2]; cross[2] = v1[0]*v2[1] - v1[1]*v2[0]; } double sqrt(double x); vec_t VectorLength(vec3_t v) { int i; float length; length = 0; for (i=0 ; i< 3 ; i++) length += v[i]*v[i]; length = sqrt (length); // FIXME return length; } void VectorInverse (vec3_t v) { v[0] = -v[0]; v[1] = -v[1]; v[2] = -v[2]; } void VectorScale (vec3_t in, vec_t scale, vec3_t out) { out[0] = in[0]*scale; out[1] = in[1]*scale; out[2] = in[2]*scale; } int Q_log2(int val) { int answer=0; while (val>>=1) answer++; return answer; } //==================================================================================== /* ============ COM_SkipPath ============ */ char *COM_SkipPath (char *pathname) { char *last; last = pathname; while (*pathname) { if (*pathname=='/') last = pathname+1; pathname++; } return last; } /* ============ COM_StripExtension ============ */ void COM_StripExtension (char *in, char *out) { while (*in && *in != '.') *out++ = *in++; *out = 0; } /* ============ COM_FileExtension ============ */ char *COM_FileExtension (char *in) { static char exten[8]; int i; while (*in && *in != '.') in++; if (!*in) return ""; in++; for (i=0 ; i<7 && *in ; i++,in++) exten[i] = *in; exten[i] = 0; return exten; } /* ============ COM_FileBase ============ */ void COM_FileBase (char *in, char *out) { char *s, *s2; s = in + strlen(in) - 1; while (s != in && *s != '.') s--; for (s2 = s ; s2 != in && *s2 != '/' ; s2--) ; if (s-s2 < 2) out[0] = 0; else { s--; strncpy (out,s2+1, s-s2); out[s-s2] = 0; } } /* ============ COM_FilePath Returns the path up to, but not including the last / ============ */ void COM_FilePath (char *in, char *out) { char *s; s = in + strlen(in) - 1; while (s != in && *s != '/') s--; strncpy (out,in, s-in); out[s-in] = 0; } /* ================== COM_DefaultExtension ================== */ void COM_DefaultExtension (char *path, char *extension) { char *src; // // if path doesn't have a .EXT, append extension // (extension should include the .) // src = path + strlen(path) - 1; while (*src != '/' && src != path) { if (*src == '.') return; // it has an extension src--; } strcat (path, extension); } /* ============================================================================ BYTE ORDER FUNCTIONS ============================================================================ */ qboolean bigendien; // can't just use function pointers, or dll linkage can // mess up when qcommon is included in multiple places short (*_BigShort) (short l); short (*_LittleShort) (short l); int (*_BigLong) (int l); int (*_LittleLong) (int l); float (*_BigFloat) (float l); float (*_LittleFloat) (float l); short BigShort(short l){return _BigShort(l);} short LittleShort(short l) {return _LittleShort(l);} int BigLong (int l) {return _BigLong(l);} int LittleLong (int l) {return _LittleLong(l);} float BigFloat (float l) {return _BigFloat(l);} float LittleFloat (float l) {return _LittleFloat(l);} short ShortSwap (short l) { byte b1,b2; b1 = l&255; b2 = (l>>8)&255; return (b1<<8) + b2; } short ShortNoSwap (short l) { return l; } int LongSwap (int l) { byte b1,b2,b3,b4; b1 = l&255; b2 = (l>>8)&255; b3 = (l>>16)&255; b4 = (l>>24)&255; return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4; } int LongNoSwap (int l) { return l; } float FloatSwap (float f) { union { float f; byte b[4]; } dat1, dat2; dat1.f = f; dat2.b[0] = dat1.b[3]; dat2.b[1] = dat1.b[2]; dat2.b[2] = dat1.b[1]; dat2.b[3] = dat1.b[0]; return dat2.f; } float FloatNoSwap (float f) { return f; } /* ================ Swap_Init ================ */ void Swap_Init (void) { byte swaptest[2] = {1,0}; // set the byte swapping variables in a portable manner if ( *(short *)swaptest == 1) { bigendien = false; _BigShort = ShortSwap; _LittleShort = ShortNoSwap; _BigLong = LongSwap; _LittleLong = LongNoSwap; _BigFloat = FloatSwap; _LittleFloat = FloatNoSwap; } else { bigendien = true; _BigShort = ShortNoSwap; _LittleShort = ShortSwap; _BigLong = LongNoSwap; _LittleLong = LongSwap; _BigFloat = FloatNoSwap; _LittleFloat = FloatSwap; } } /* ============ va does a varargs printf into a temp buffer, so I don't need to have varargs versions of all text functions. FIXME: make this buffer size safe someday ============ */ char *va(char *format, ...) { va_list argptr; static char string[1024]; va_start (argptr, format); vsprintf (string, format,argptr); va_end (argptr); return string; } char com_token[MAX_TOKEN_CHARS]; /* ============== COM_Parse Parse a token out of a string ============== */ char *COM_Parse (char **data_p) { int c; int len; char *data; data = *data_p; len = 0; com_token[0] = 0; if (!data) { *data_p = NULL; return ""; } // skip whitespace skipwhite: while ( (c = *data) <= ' ') { if (c == 0) { *data_p = NULL; return ""; } data++; } // skip // comments if (c=='/' && data[1] == '/') { while (*data && *data != '\n') data++; goto skipwhite; } // handle quoted strings specially if (c == '\"') { data++; while (1) { c = *data++; if (c=='\"' || !c) { com_token[len] = 0; *data_p = data; return com_token; } if (len < MAX_TOKEN_CHARS) { com_token[len] = c; len++; } } } // parse a regular word do { if (len < MAX_TOKEN_CHARS) { com_token[len] = c; len++; } data++; c = *data; } while (c>32); if (len == MAX_TOKEN_CHARS) { // Com_Printf ("Token exceeded %i chars, discarded.\n", MAX_TOKEN_CHARS); len = 0; } com_token[len] = 0; *data_p = data; return com_token; } /* =============== Com_PageInMemory =============== */ int paged_total; void Com_PageInMemory (byte *buffer, int size) { int i; for (i=size-1 ; i>0 ; i-=4096) paged_total += buffer[i]; } /* ============================================================================ LIBRARY REPLACEMENT FUNCTIONS ============================================================================ */ int Q_strncasecmp (char *s1, char *s2, int n) { int c1, c2; do { c1 = *s1++; c2 = *s2++; if (!n--) return 0; // strings are equal until end point if (c1 != c2) { if (c1 >= 'a' && c1 <= 'z') c1 -= ('a' - 'A'); if (c2 >= 'a' && c2 <= 'z') c2 -= ('a' - 'A'); if (c1 != c2) return -1; // strings not equal } } while (c1); return 0; // strings are equal } int Q_strcasecmp (char *s1, char *s2) { return Q_strncasecmp (s1, s2, 99999); } void Com_sprintf (char *dest, int size, char *fmt, ...) { int len; va_list argptr; char bigbuffer[0x10000]; va_start (argptr,fmt); len = vsprintf (bigbuffer,fmt,argptr); va_end (argptr); if (len >= size) Com_Printf ("Com_sprintf: overflow of %i in %i\n", len, size); strncpy (dest, bigbuffer, size-1); } /* ===================================================================== INFO STRINGS ===================================================================== */ /* =============== Info_ValueForKey Searches the string for the given key and returns the associated value, or an empty string. =============== */ char *Info_ValueForKey (char *s, char *key) { char pkey[512]; static char value[2][512]; // use two buffers so compares // work without stomping on each other static int valueindex; char *o; valueindex ^= 1; if (*s == '\\') s++; while (1) { o = pkey; while (*s != '\\') { if (!*s) return ""; *o++ = *s++; } *o = 0; s++; o = value[valueindex]; while (*s != '\\' && *s) { if (!*s) return ""; *o++ = *s++; } *o = 0; if (!strcmp (key, pkey) ) return value[valueindex]; if (!*s) return ""; s++; } } void Info_RemoveKey (char *s, char *key) { char *start; char pkey[512]; char value[512]; char *o; if (strstr (key, "\\")) { // Com_Printf ("Can't use a key with a \\\n"); return; } while (1) { start = s; if (*s == '\\') s++; o = pkey; while (*s != '\\') { if (!*s) return; *o++ = *s++; } *o = 0; s++; o = value; while (*s != '\\' && *s) { if (!*s) return; *o++ = *s++; } *o = 0; if (!strcmp (key, pkey) ) { strcpy (start, s); // remove this part return; } if (!*s) return; } } /* ================== Info_Validate Some characters are illegal in info strings because they can mess up the server's parsing ================== */ qboolean Info_Validate (char *s) { if (strstr (s, "\"")) return false; if (strstr (s, ";")) return false; return true; } void Info_SetValueForKey (char *s, char *key, char *value) { char newi[MAX_INFO_STRING], *v; int c; int maxsize = MAX_INFO_STRING; if (strstr (key, "\\") || strstr (value, "\\") ) { Com_Printf ("Can't use keys or values with a \\\n"); return; } if (strstr (key, ";") ) { Com_Printf ("Can't use keys or values with a semicolon\n"); return; } if (strstr (key, "\"") || strstr (value, "\"") ) { Com_Printf ("Can't use keys or values with a \"\n"); return; } if (strlen(key) > MAX_INFO_KEY-1 || strlen(value) > MAX_INFO_KEY-1) { Com_Printf ("Keys and values must be < 64 characters.\n"); return; } Info_RemoveKey (s, key); if (!value || !strlen(value)) return; Com_sprintf (newi, sizeof(newi), "\\%s\\%s", key, value); if (strlen(newi) + strlen(s) > maxsize) { Com_Printf ("Info string length exceeded\n"); return; } // only copy ascii values s += strlen(s); v = newi; while (*v) { c = *v++; c &= 127; // strip high bits if (c >= 32 && c < 127) *s++ = c; } *s = 0; } //====================================================================