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1.1 root 1: // g_phys.c
2:
3: #include "g_local.h"
4:
5: /*
6:
7:
8: pushmove objects do not obey gravity, and do not interact with each other or trigger fields, but block normal movement and push normal objects when they move.
9:
10: onground is set for toss objects when they come to a complete rest. it is set for steping or walking objects
11:
12: doors, plats, etc are SOLID_BSP, and MOVETYPE_PUSH
13: bonus items are SOLID_TRIGGER touch, and MOVETYPE_TOSS
14: corpses are SOLID_NOT and MOVETYPE_TOSS
15: crates are SOLID_BBOX and MOVETYPE_TOSS
16: walking monsters are SOLID_SLIDEBOX and MOVETYPE_STEP
17: flying/floating monsters are SOLID_SLIDEBOX and MOVETYPE_FLY
18:
19: solid_edge items only clip against bsp models.
20:
21: */
22:
23:
24: /*
25: ============
26: SV_TestEntityPosition
27:
28: ============
29: */
30: edict_t *SV_TestEntityPosition (edict_t *ent)
31: {
32: trace_t trace;
33: int mask;
34:
35: if (ent->clipmask)
36: mask = ent->clipmask;
37: else
38: mask = MASK_SOLID;
39: trace = gi.trace (ent->s.origin, ent->mins, ent->maxs, ent->s.origin, ent, mask);
40:
41: if (trace.startsolid)
42: return g_edicts;
43:
44: return NULL;
45: }
46:
47:
48: /*
49: ================
50: SV_CheckVelocity
51: ================
52: */
53: void SV_CheckVelocity (edict_t *ent)
54: {
55: int i;
56:
57: //
58: // bound velocity
59: //
60: for (i=0 ; i<3 ; i++)
61: {
62: if (ent->velocity[i] > sv_maxvelocity->value)
63: ent->velocity[i] = sv_maxvelocity->value;
64: else if (ent->velocity[i] < -sv_maxvelocity->value)
65: ent->velocity[i] = -sv_maxvelocity->value;
66: }
67: }
68:
69: /*
70: =============
71: SV_RunThink
72:
73: Runs thinking code for this frame if necessary
74: =============
75: */
76: qboolean SV_RunThink (edict_t *ent)
77: {
78: float thinktime;
79:
80: thinktime = ent->nextthink;
81: if (thinktime <= 0)
82: return true;
83: if (thinktime > level.time+0.001)
84: return true;
85:
86: ent->nextthink = 0;
87: if (!ent->think)
88: gi.error ("NULL ent->think");
89: ent->think (ent);
90:
91: return false;
92: }
93:
94: /*
95: ==================
96: SV_Impact
97:
98: Two entities have touched, so run their touch functions
99: ==================
100: */
101: void SV_Impact (edict_t *e1, trace_t *trace)
102: {
103: edict_t *e2;
104: // cplane_t backplane;
105:
106: e2 = trace->ent;
107:
108: if (e1->touch && e1->solid != SOLID_NOT)
109: e1->touch (e1, e2, &trace->plane, trace->surface);
110:
111: if (e2->touch && e2->solid != SOLID_NOT)
112: e2->touch (e2, e1, NULL, NULL);
113: }
114:
115:
116: /*
117: ==================
118: ClipVelocity
119:
120: Slide off of the impacting object
121: returns the blocked flags (1 = floor, 2 = step / wall)
122: ==================
123: */
124: #define STOP_EPSILON 0.1
125:
126: int ClipVelocity (vec3_t in, vec3_t normal, vec3_t out, float overbounce)
127: {
128: float backoff;
129: float change;
130: int i, blocked;
131:
132: blocked = 0;
133: if (normal[2] > 0)
134: blocked |= 1; // floor
135: if (!normal[2])
136: blocked |= 2; // step
137:
138: backoff = DotProduct (in, normal) * overbounce;
139:
140: for (i=0 ; i<3 ; i++)
141: {
142: change = normal[i]*backoff;
143: out[i] = in[i] - change;
144: if (out[i] > -STOP_EPSILON && out[i] < STOP_EPSILON)
145: out[i] = 0;
146: }
147:
148: return blocked;
149: }
150:
151:
152: /*
153: ============
154: SV_FlyMove
155:
156: The basic solid body movement clip that slides along multiple planes
157: Returns the clipflags if the velocity was modified (hit something solid)
158: 1 = floor
159: 2 = wall / step
160: 4 = dead stop
161: ============
162: */
163: #define MAX_CLIP_PLANES 5
164: int SV_FlyMove (edict_t *ent, float time, int mask)
165: {
166: edict_t *hit;
167: int bumpcount, numbumps;
168: vec3_t dir;
169: float d;
170: int numplanes;
171: vec3_t planes[MAX_CLIP_PLANES];
172: vec3_t primal_velocity, original_velocity, new_velocity;
173: int i, j;
174: trace_t trace;
175: vec3_t end;
176: float time_left;
177: int blocked;
178:
179: numbumps = 4;
180:
181: blocked = 0;
182: VectorCopy (ent->velocity, original_velocity);
183: VectorCopy (ent->velocity, primal_velocity);
184: numplanes = 0;
185:
186: time_left = time;
187:
188: ent->groundentity = NULL;
189: for (bumpcount=0 ; bumpcount<numbumps ; bumpcount++)
190: {
191: for (i=0 ; i<3 ; i++)
192: end[i] = ent->s.origin[i] + time_left * ent->velocity[i];
193:
194: trace = gi.trace (ent->s.origin, ent->mins, ent->maxs, end, ent, mask);
195:
196: if (trace.allsolid)
197: { // entity is trapped in another solid
198: VectorCopy (vec3_origin, ent->velocity);
199: return 3;
200: }
201:
202: if (trace.fraction > 0)
203: { // actually covered some distance
204: VectorCopy (trace.endpos, ent->s.origin);
205: VectorCopy (ent->velocity, original_velocity);
206: numplanes = 0;
207: }
208:
209: if (trace.fraction == 1)
210: break; // moved the entire distance
211:
212: hit = trace.ent;
213:
214: if (trace.plane.normal[2] > 0.7)
215: {
216: blocked |= 1; // floor
217: if ( hit->solid == SOLID_BSP)
218: {
219: ent->groundentity = hit;
220: ent->groundentity_linkcount = hit->linkcount;
221: }
222: }
223: if (!trace.plane.normal[2])
224: {
225: blocked |= 2; // step
226: }
227:
228: //
229: // run the impact function
230: //
231: SV_Impact (ent, &trace);
232: if (!ent->inuse)
233: break; // removed by the impact function
234:
235:
236: time_left -= time_left * trace.fraction;
237:
238: // cliped to another plane
239: if (numplanes >= MAX_CLIP_PLANES)
240: { // this shouldn't really happen
241: VectorCopy (vec3_origin, ent->velocity);
242: return 3;
243: }
244:
245: VectorCopy (trace.plane.normal, planes[numplanes]);
246: numplanes++;
247:
248: //
249: // modify original_velocity so it parallels all of the clip planes
250: //
251: for (i=0 ; i<numplanes ; i++)
252: {
253: ClipVelocity (original_velocity, planes[i], new_velocity, 1);
254:
255: for (j=0 ; j<numplanes ; j++)
256: if ((j != i) && !VectorCompare (planes[i], planes[j]))
257: {
258: if (DotProduct (new_velocity, planes[j]) < 0)
259: break; // not ok
260: }
261: if (j == numplanes)
262: break;
263: }
264:
265: if (i != numplanes)
266: { // go along this plane
267: VectorCopy (new_velocity, ent->velocity);
268: }
269: else
270: { // go along the crease
271: if (numplanes != 2)
272: {
273: // gi.dprintf ("clip velocity, numplanes == %i\n",numplanes);
274: VectorCopy (vec3_origin, ent->velocity);
275: return 7;
276: }
277: CrossProduct (planes[0], planes[1], dir);
278: d = DotProduct (dir, ent->velocity);
279: VectorScale (dir, d, ent->velocity);
280: }
281:
282: //
283: // if original velocity is against the original velocity, stop dead
284: // to avoid tiny occilations in sloping corners
285: //
286: if (DotProduct (ent->velocity, primal_velocity) <= 0)
287: {
288: VectorCopy (vec3_origin, ent->velocity);
289: return blocked;
290: }
291: }
292:
293: return blocked;
294: }
295:
296:
297: /*
298: ============
299: SV_AddGravity
300:
301: ============
302: */
303: void SV_AddGravity (edict_t *ent)
304: {
305: ent->velocity[2] -= ent->gravity * sv_gravity->value * FRAMETIME;
306: }
307:
308: /*
309: ===============================================================================
310:
311: PUSHMOVE
312:
313: ===============================================================================
314: */
315:
316: /*
317: ============
318: SV_PushEntity
319:
320: Does not change the entities velocity at all
321: ============
322: */
323: trace_t SV_PushEntity (edict_t *ent, vec3_t push)
324: {
325: trace_t trace;
326: vec3_t start;
327: vec3_t end;
328: int mask;
329:
330: VectorCopy (ent->s.origin, start);
331: VectorAdd (start, push, end);
332:
333: retry:
334: if (ent->clipmask)
335: mask = ent->clipmask;
336: else
337: mask = MASK_SOLID;
338:
339: trace = gi.trace (start, ent->mins, ent->maxs, end, ent, mask);
340:
341: VectorCopy (trace.endpos, ent->s.origin);
342: gi.linkentity (ent);
343:
344: if (trace.fraction != 1.0)
345: {
346: SV_Impact (ent, &trace);
347:
348: // if the pushed entity went away and the pusher is still there
349: if (!trace.ent->inuse && ent->inuse)
350: {
351: // move the pusher back and try again
352: VectorCopy (start, ent->s.origin);
353: gi.linkentity (ent);
354: goto retry;
355: }
356: }
357:
358: if (ent->inuse)
359: G_TouchTriggers (ent);
360:
361: return trace;
362: }
363:
364:
365: typedef struct
366: {
367: edict_t *ent;
368: vec3_t origin;
369: vec3_t angles;
370: float deltayaw;
371: } pushed_t;
372: pushed_t pushed[MAX_EDICTS], *pushed_p;
373:
374: edict_t *obstacle;
375:
376: /*
377: ============
378: SV_Push
379:
380: Objects need to be moved back on a failed push,
381: otherwise riders would continue to slide.
382: ============
383: */
384: qboolean SV_Push (edict_t *pusher, vec3_t move, vec3_t amove)
385: {
386: int i, e;
387: edict_t *check, *block;
388: vec3_t mins, maxs;
389: pushed_t *p;
390: vec3_t org, org2, move2, forward, right, up;
391:
392: // clamp the move to 1/8 units, so the position will
393: // be accurate for client side prediction
394: for (i=0 ; i<3 ; i++)
395: {
396: float temp;
397: temp = move[i]*8.0;
398: if (temp > 0.0)
399: temp += 0.5;
400: else
401: temp -= 0.5;
402: move[i] = 0.125 * (int)temp;
403: }
404:
405: // find the bounding box
406: for (i=0 ; i<3 ; i++)
407: {
408: mins[i] = pusher->absmin[i] + move[i];
409: maxs[i] = pusher->absmax[i] + move[i];
410: }
411:
412: // we need this for pushing things later
413: VectorSubtract (vec3_origin, amove, org);
414: AngleVectors (org, forward, right, up);
415:
416: // save the pusher's original position
417: pushed_p->ent = pusher;
418: VectorCopy (pusher->s.origin, pushed_p->origin);
419: VectorCopy (pusher->s.angles, pushed_p->angles);
420: if (pusher->client)
421: pushed_p->deltayaw = pusher->client->ps.pmove.delta_angles[YAW];
422: pushed_p++;
423:
424: // move the pusher to it's final position
425: VectorAdd (pusher->s.origin, move, pusher->s.origin);
426: VectorAdd (pusher->s.angles, amove, pusher->s.angles);
427: gi.linkentity (pusher);
428:
429: // see if any solid entities are inside the final position
430: check = g_edicts+1;
431: for (e = 1; e < globals.num_edicts; e++, check++)
432: {
433: if (!check->inuse)
434: continue;
435: if (check->movetype == MOVETYPE_PUSH
436: || check->movetype == MOVETYPE_STOP
437: || check->movetype == MOVETYPE_NONE
438: || check->movetype == MOVETYPE_NOCLIP)
439: continue;
440:
441: if (!check->area.prev)
442: continue; // not linked in anywhere
443:
444: // if the entity is standing on the pusher, it will definitely be moved
445: if (check->groundentity != pusher)
446: {
447: // see if the ent needs to be tested
448: if ( check->absmin[0] >= maxs[0]
449: || check->absmin[1] >= maxs[1]
450: || check->absmin[2] >= maxs[2]
451: || check->absmax[0] <= mins[0]
452: || check->absmax[1] <= mins[1]
453: || check->absmax[2] <= mins[2] )
454: continue;
455:
456: // see if the ent's bbox is inside the pusher's final position
457: if (!SV_TestEntityPosition (check))
458: continue;
459: }
460:
461: if ((pusher->movetype == MOVETYPE_PUSH) || (check->groundentity == pusher))
462: {
463: // move this entity
464: pushed_p->ent = check;
465: VectorCopy (check->s.origin, pushed_p->origin);
466: VectorCopy (check->s.angles, pushed_p->angles);
467: pushed_p++;
468:
469: // try moving the contacted entity
470: VectorAdd (check->s.origin, move, check->s.origin);
471: if (check->client)
472: { // FIXME: doesn't rotate monsters?
473: check->client->ps.pmove.delta_angles[YAW] += amove[YAW];
474: }
475:
476: // figure movement due to the pusher's amove
477: VectorSubtract (check->s.origin, pusher->s.origin, org);
478: org2[0] = DotProduct (org, forward);
479: org2[1] = -DotProduct (org, right);
480: org2[2] = DotProduct (org, up);
481: VectorSubtract (org2, org, move2);
482: VectorAdd (check->s.origin, move2, check->s.origin);
483:
484: // may have pushed them off an edge
485: if (check->groundentity != pusher)
486: check->groundentity = NULL;
487:
488: block = SV_TestEntityPosition (check);
489: if (!block)
490: { // pushed ok
491: gi.linkentity (check);
492: // impact?
493: continue;
494: }
495:
496: // if it is ok to leave in the old position, do it
497: // this is only relevent for riding entities, not pushed
498: // FIXME: this doesn't acount for rotation
499: VectorSubtract (check->s.origin, move, check->s.origin);
500: block = SV_TestEntityPosition (check);
501: if (!block)
502: {
503: pushed_p--;
504: continue;
505: }
506: }
507:
508: // save off the obstacle so we can call the block function
509: obstacle = check;
510:
511: // move back any entities we already moved
512: // go backwards, so if the same entity was pushed
513: // twice, it goes back to the original position
514: for (p=pushed_p-1 ; p>=pushed ; p--)
515: {
516: VectorCopy (p->origin, p->ent->s.origin);
517: VectorCopy (p->angles, p->ent->s.angles);
518: if (p->ent->client)
519: {
520: p->ent->client->ps.pmove.delta_angles[YAW] = p->deltayaw;
521: }
522: gi.linkentity (p->ent);
523: }
524: return false;
525: }
526:
527: //FIXME: is there a better way to handle this?
528: // see if anything we moved has touched a trigger
529: for (p=pushed_p-1 ; p>=pushed ; p--)
530: G_TouchTriggers (p->ent);
531:
532: return true;
533: }
534:
535: /*
536: ================
537: SV_Physics_Pusher
538:
539: Bmodel objects don't interact with each other, but
540: push all box objects
541: ================
542: */
543: void SV_Physics_Pusher (edict_t *ent)
544: {
545: vec3_t move, amove;
546: edict_t *part, *mv;
547:
548: // if not a team captain, so movement will be handled elsewhere
549: if ( ent->flags & FL_TEAMSLAVE)
550: return;
551:
552: // make sure all team slaves can move before commiting
553: // any moves or calling any think functions
554: // if the move is blocked, all moved objects will be backed out
555: //retry:
556: pushed_p = pushed;
557: for (part = ent ; part ; part=part->teamchain)
558: {
559: if (part->velocity[0] || part->velocity[1] || part->velocity[2] ||
560: part->avelocity[0] || part->avelocity[1] || part->avelocity[2]
561: )
562: { // object is moving
563: VectorScale (part->velocity, FRAMETIME, move);
564: VectorScale (part->avelocity, FRAMETIME, amove);
565:
566: if (!SV_Push (part, move, amove))
567: break; // move was blocked
568: }
569: }
570: if (pushed_p > &pushed[MAX_EDICTS])
571: gi.error (ERR_FATAL, "pushed_p > &pushed[MAX_EDICTS], memory corrupted");
572:
573: if (part)
574: {
575: // the move failed, bump all nextthink times and back out moves
576: for (mv = ent ; mv ; mv=mv->teamchain)
577: {
578: if (mv->nextthink > 0)
579: mv->nextthink += FRAMETIME;
580: }
581:
582: // if the pusher has a "blocked" function, call it
583: // otherwise, just stay in place until the obstacle is gone
584: if (part->blocked)
585: part->blocked (part, obstacle);
586: #if 0
587: // if the pushed entity went away and the pusher is still there
588: if (!obstacle->inuse && part->inuse)
589: goto retry;
590: #endif
591: }
592: else
593: {
594: // the move succeeded, so call all think functions
595: for (part = ent ; part ; part=part->teamchain)
596: {
597: SV_RunThink (part);
598: }
599: }
600: }
601:
602: //==================================================================
603:
604: /*
605: =============
606: SV_Physics_None
607:
608: Non moving objects can only think
609: =============
610: */
611: void SV_Physics_None (edict_t *ent)
612: {
613: // regular thinking
614: SV_RunThink (ent);
615: }
616:
617: /*
618: =============
619: SV_Physics_Noclip
620:
621: A moving object that doesn't obey physics
622: =============
623: */
624: void SV_Physics_Noclip (edict_t *ent)
625: {
626: // regular thinking
627: if (!SV_RunThink (ent))
628: return;
629:
630: VectorMA (ent->s.angles, FRAMETIME, ent->avelocity, ent->s.angles);
631: VectorMA (ent->s.origin, FRAMETIME, ent->velocity, ent->s.origin);
632:
633: gi.linkentity (ent);
634: }
635:
636: /*
637: ==============================================================================
638:
639: TOSS / BOUNCE
640:
641: ==============================================================================
642: */
643:
644: /*
645: =============
646: SV_Physics_Toss
647:
648: Toss, bounce, and fly movement. When onground, do nothing.
649: =============
650: */
651: void SV_Physics_Toss (edict_t *ent)
652: {
653: trace_t trace;
654: vec3_t move;
655: float backoff;
656: edict_t *slave;
657: qboolean wasinwater;
658: qboolean isinwater;
659: vec3_t old_origin;
660:
661: // regular thinking
662: SV_RunThink (ent);
663:
664: // if not a team captain, so movement will be handled elsewhere
665: if ( ent->flags & FL_TEAMSLAVE)
666: return;
667:
668: if (ent->velocity[2] > 0)
669: ent->groundentity = NULL;
670:
671: // check for the groundentity going away
672: if (ent->groundentity)
673: if (!ent->groundentity->inuse)
674: ent->groundentity = NULL;
675:
676: // if onground, return without moving
677: if ( ent->groundentity )
678: return;
679:
680: VectorCopy (ent->s.origin, old_origin);
681:
682: SV_CheckVelocity (ent);
683:
684: // add gravity
685: if (ent->movetype != MOVETYPE_FLY
686: && ent->movetype != MOVETYPE_FLYMISSILE
687: // RAFAEL
688: // move type for rippergun projectile
689: && ent->movetype != MOVETYPE_WALLBOUNCE)
690: SV_AddGravity (ent);
691:
692: // move angles
693: VectorMA (ent->s.angles, FRAMETIME, ent->avelocity, ent->s.angles);
694:
695: // move origin
696: VectorScale (ent->velocity, FRAMETIME, move);
697: trace = SV_PushEntity (ent, move);
698: if (!ent->inuse)
699: return;
700:
701: if (trace.fraction < 1)
702: {
703: // RAFAEL
704: if (ent->movetype == MOVETYPE_WALLBOUNCE)
705: backoff = 2.0;
706: // RAFAEL ( else )
707: else if (ent->movetype == MOVETYPE_BOUNCE)
708: backoff = 1.5;
709: else
710: backoff = 1;
711:
712: ClipVelocity (ent->velocity, trace.plane.normal, ent->velocity, backoff);
713:
714: // RAFAEL
715: if (ent->movetype == MOVETYPE_WALLBOUNCE)
716: vectoangles (ent->velocity, ent->s.angles);
717:
718: // stop if on ground
719: // RAFAEL
720: if (trace.plane.normal[2] > 0.7 && ent->movetype != MOVETYPE_WALLBOUNCE)
721: {
722: if (ent->velocity[2] < 60 || ent->movetype != MOVETYPE_BOUNCE )
723: {
724: ent->groundentity = trace.ent;
725: ent->groundentity_linkcount = trace.ent->linkcount;
726: VectorCopy (vec3_origin, ent->velocity);
727: VectorCopy (vec3_origin, ent->avelocity);
728: }
729: }
730:
731: // if (ent->touch)
732: // ent->touch (ent, trace.ent, &trace.plane, trace.surface);
733: }
734:
735: // check for water transition
736: wasinwater = (ent->watertype & MASK_WATER);
737: ent->watertype = gi.pointcontents (ent->s.origin);
738: isinwater = ent->watertype & MASK_WATER;
739:
740: if (isinwater)
741: ent->waterlevel = 1;
742: else
743: ent->waterlevel = 0;
744:
745: if (!wasinwater && isinwater)
746: gi.positioned_sound (old_origin, g_edicts, CHAN_AUTO, gi.soundindex("misc/h2ohit1.wav"), 1, 1, 0);
747: else if (wasinwater && !isinwater)
748: gi.positioned_sound (ent->s.origin, g_edicts, CHAN_AUTO, gi.soundindex("misc/h2ohit1.wav"), 1, 1, 0);
749:
750: // move teamslaves
751: for (slave = ent->teamchain; slave; slave = slave->teamchain)
752: {
753: VectorCopy (ent->s.origin, slave->s.origin);
754: gi.linkentity (slave);
755: }
756: }
757:
758: /*
759: ===============================================================================
760:
761: STEPPING MOVEMENT
762:
763: ===============================================================================
764: */
765:
766: /*
767: =============
768: SV_Physics_Step
769:
770: Monsters freefall when they don't have a ground entity, otherwise
771: all movement is done with discrete steps.
772:
773: This is also used for objects that have become still on the ground, but
774: will fall if the floor is pulled out from under them.
775: FIXME: is this true?
776: =============
777: */
778:
779: //FIXME: hacked in for E3 demo
780: #define sv_stopspeed 100
781: #define sv_friction 6
782: #define sv_waterfriction 1
783:
784: void SV_AddRotationalFriction (edict_t *ent)
785: {
786: int n;
787: float adjustment;
788:
789: VectorMA (ent->s.angles, FRAMETIME, ent->avelocity, ent->s.angles);
790: adjustment = FRAMETIME * sv_stopspeed * sv_friction;
791: for (n = 0; n < 3; n++)
792: {
793: if (ent->avelocity[n] > 0)
794: {
795: ent->avelocity[n] -= adjustment;
796: if (ent->avelocity[n] < 0)
797: ent->avelocity[n] = 0;
798: }
799: else
800: {
801: ent->avelocity[n] += adjustment;
802: if (ent->avelocity[n] > 0)
803: ent->avelocity[n] = 0;
804: }
805: }
806: }
807:
808: void SV_Physics_Step (edict_t *ent)
809: {
810: qboolean wasonground;
811: qboolean hitsound = false;
812: float *vel;
813: float speed, newspeed, control;
814: float friction;
815: edict_t *groundentity;
816: int mask;
817:
818: // airborn monsters should always check for ground
819: if (!ent->groundentity)
820: M_CheckGround (ent);
821:
822: groundentity = ent->groundentity;
823:
824: SV_CheckVelocity (ent);
825:
826: if (groundentity)
827: wasonground = true;
828: else
829: wasonground = false;
830:
831: if (ent->avelocity[0] || ent->avelocity[1] || ent->avelocity[2])
832: SV_AddRotationalFriction (ent);
833:
834: // add gravity except:
835: // flying monsters
836: // swimming monsters who are in the water
837: if (! wasonground)
838: if (!(ent->flags & FL_FLY))
839: if (!((ent->flags & FL_SWIM) && (ent->waterlevel > 2)))
840: {
841: if (ent->velocity[2] < sv_gravity->value*-0.1)
842: hitsound = true;
843: if (ent->waterlevel == 0)
844: SV_AddGravity (ent);
845: }
846:
847: // friction for flying monsters that have been given vertical velocity
848: if ((ent->flags & FL_FLY) && (ent->velocity[2] != 0))
849: {
850: speed = fabs(ent->velocity[2]);
851: control = speed < sv_stopspeed ? sv_stopspeed : speed;
852: friction = sv_friction/3;
853: newspeed = speed - (FRAMETIME * control * friction);
854: if (newspeed < 0)
855: newspeed = 0;
856: newspeed /= speed;
857: ent->velocity[2] *= newspeed;
858: }
859:
860: // friction for flying monsters that have been given vertical velocity
861: if ((ent->flags & FL_SWIM) && (ent->velocity[2] != 0))
862: {
863: speed = fabs(ent->velocity[2]);
864: control = speed < sv_stopspeed ? sv_stopspeed : speed;
865: newspeed = speed - (FRAMETIME * control * sv_waterfriction * ent->waterlevel);
866: if (newspeed < 0)
867: newspeed = 0;
868: newspeed /= speed;
869: ent->velocity[2] *= newspeed;
870: }
871:
872: if (ent->velocity[2] || ent->velocity[1] || ent->velocity[0])
873: {
874: // apply friction
875: // let dead monsters who aren't completely onground slide
876: if ((wasonground) || (ent->flags & (FL_SWIM|FL_FLY)))
877: if (!(ent->health <= 0.0 && !M_CheckBottom(ent)))
878: {
879: vel = ent->velocity;
880: speed = sqrt(vel[0]*vel[0] +vel[1]*vel[1]);
881: if (speed)
882: {
883: friction = sv_friction;
884:
885: control = speed < sv_stopspeed ? sv_stopspeed : speed;
886: newspeed = speed - FRAMETIME*control*friction;
887:
888: if (newspeed < 0)
889: newspeed = 0;
890: newspeed /= speed;
891:
892: vel[0] *= newspeed;
893: vel[1] *= newspeed;
894: }
895: }
896:
897: if (ent->svflags & SVF_MONSTER)
898: mask = MASK_MONSTERSOLID;
899: else
900: mask = MASK_SOLID;
901: SV_FlyMove (ent, FRAMETIME, mask);
902:
903: gi.linkentity (ent);
904: G_TouchTriggers (ent);
905: if (!ent->inuse)
906: return;
907:
908: if (ent->groundentity)
909: if (!wasonground)
910: if (hitsound)
911: gi.sound (ent, 0, gi.soundindex("world/land.wav"), 1, 1, 0);
912: }
913:
914: // regular thinking
915: SV_RunThink (ent);
916: }
917:
918: //============================================================================
919: /*
920: ================
921: G_RunEntity
922:
923: ================
924: */
925: void G_RunEntity (edict_t *ent)
926: {
927: if (ent->prethink)
928: ent->prethink (ent);
929:
930: switch ( (int)ent->movetype)
931: {
932: case MOVETYPE_PUSH:
933: case MOVETYPE_STOP:
934: SV_Physics_Pusher (ent);
935: break;
936: case MOVETYPE_NONE:
937: SV_Physics_None (ent);
938: break;
939: case MOVETYPE_NOCLIP:
940: SV_Physics_Noclip (ent);
941: break;
942: case MOVETYPE_STEP:
943: SV_Physics_Step (ent);
944: break;
945: case MOVETYPE_TOSS:
946: case MOVETYPE_BOUNCE:
947: case MOVETYPE_FLY:
948: case MOVETYPE_FLYMISSILE:
949: // RAFAEL
950: case MOVETYPE_WALLBOUNCE:
951: SV_Physics_Toss (ent);
952: break;
953: default:
954: gi.error ("SV_Physics: bad movetype %i", (int)ent->movetype);
955: }
956: }
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