1 float PUSH_ONCE                 = 1;
2 float PUSH_SILENT               = 2;
4 .float pushltime;
5 .float height;
7 void() SUB_UseTargets;
9 float trigger_push_calculatevelocity_flighttime;
11 void trigger_push_use()
12 {
13         if(teams_matter)
14                 self.team = activator.team;
15 }
17 /*
18         trigger_push_calculatevelocity
20         Arguments:
21           org - origin of the object which is to be pushed
22           tgt - target entity (can be either a point or a model entity; if it is
23                 the latter, its midpoint is used)
24           ht  - jump height, measured from the higher one of org and tgt's midpoint
26         Returns: velocity for the jump
27         the global trigger_push_calculatevelocity_flighttime is set to the total
28         jump time
29  */
31 vector trigger_push_calculatevelocity(vector org, entity tgt, float ht)
32 {
33         local float grav, sdist, zdist, vs, vz, jumpheight;
34         local vector sdir, torg;
36         torg = tgt.origin + (tgt.mins + tgt.maxs) * 0.5;
38         grav = cvar("sv_gravity");
40         zdist = torg_z - org_z;
41         sdist = vlen(torg - org - zdist * '0 0 1');
42         sdir = normalize(torg - org - zdist * '0 0 1');
44         // how high do we need to push the player?
45         jumpheight = fabs(ht);
46         if(zdist > 0)
47                 jumpheight = jumpheight + zdist;
49         /*
50                 STOP.
52                 You will not understand the following equations anyway...
53                 But here is what I did to get them.
55                 I used the functions
57                   s(t) = t * vs
58                   z(t) = t * vz - 1/2 grav t^2
60                 and solved for:
62                   s(ti) = sdist
63                   z(ti) = zdist
64                   max(z, ti) = jumpheight
66                 From these three equations, you will find the three parameters vs, vz
67                 and ti.
68          */
70         // push him so high...
71         vz = sqrt(2 * grav * jumpheight); // NOTE: sqrt(positive)!
73         // we start with downwards velocity only if it's a downjump and the jump apex should be outside the jump!
74         if(ht < 0)
75                 if(zdist < 0)
76                         vz = -vz;
78         vector solution;
79         solution = solve_quadratic(0.5 * grav, -vz, zdist); // equation "z(ti) = zdist"
80         // ALWAYS solvable because jumpheight >= zdist
81         if(!solution_z)
82                 solution_y = solution_x; // just in case it is not solvable due to roundoff errors, assume two equal solutions at their center (this is mainly for the usual case with ht == 0)
83         if(zdist == 0)
84                 solution_x = solution_y; // solution_x is 0 in this case, so don't use it, but rather use solution_y (which will be sqrt(0.5 * jumpheight / grav), actually)
86         if(zdist < 0)
87         {
88                 // down-jump
89                 if(ht < 0)
90                 {
91                         // almost straight line type
92                         // jump apex is before the jump
93                         // we must take the larger one
94                         trigger_push_calculatevelocity_flighttime = solution_y;
95                 }
96                 else
97                 {
98                         // regular jump
99                         // jump apex is during the jump
100                         // we must take the larger one too
101                         trigger_push_calculatevelocity_flighttime = solution_y;
102                 }
103         }
104         else
105         {
106                 // up-jump
107                 if(ht < 0)
108                 {
109                         // almost straight line type
110                         // jump apex is after the jump
111                         // we must take the smaller one
112                         trigger_push_calculatevelocity_flighttime = solution_x;
113                 }
114                 else
115                 {
116                         // regular jump
117                         // jump apex is during the jump
118                         // we must take the larger one
119                         trigger_push_calculatevelocity_flighttime = solution_y;
120                 }
121         }
122         vs = sdist / trigger_push_calculatevelocity_flighttime;
124         // finally calculate the velocity
125         return sdir * vs + '0 0 1' * vz;
126 }
128 void trigger_push_touch()
129 {
130         // FIXME: add a .float for whether an entity should be tossed by jumppads
131         if (!other.iscreature)
132         if (other.classname != "corpse")
133         if (other.classname != "body")
134         if (other.classname != "gib")
135         if (other.classname != "casing")
136         if (other.classname != "droppedweapon")
137         if (!other.projectiledeathtype || other.classname == "bullet")
138                 return;
141                 return;
143         if(self.team)
144                 if((self.spawnflags & 4 == 0) == (self.team != other.team))
145                         return;
147         EXACTTRIGGER_TOUCH;
149         if(self.target)
150                 self.movedir = trigger_push_calculatevelocity(other.origin, self.enemy, self.height);
152         other.flags &~= FL_ONGROUND;
154         other.velocity = self.movedir;
156         if (other.classname == "player")
157         {
158                 // reset tracking of oldvelocity for impact damage (sudden velocity changes)
159                 other.oldvelocity = other.velocity;
161                 if(self.pushltime < time)  // prevent "snorring" sound when a player hits the jumppad more than once
162                 {
163                         // flash when activated
165                         sound (other, CHAN_AUTO, self.noise, VOL_BASE, ATTN_NORM);
166                         self.pushltime = time + 0.2;
167                 }
168                 local float ct;
169                 ct = clienttype(other);
170                 if( ct == CLIENTTYPE_REAL)
171                 {
172                         local float i;
173                         local float found;
174                         found = FALSE;
175                         for(i = 0; i < other.jumppadcount && i < NUM_JUMPPADSUSED; ++i)
177                                         found = TRUE;
178                         if(!found)
179                         {
182                         }
184                         if(self.message)
185                                 centerprint(other, self.message);
186                 }
187                 else if(ct == CLIENTTYPE_BOT)
188                         other.lastteleporttime = time;
189                 else
192                 // reset tracking of who pushed you into a hazard (for kill credit)
193                 other.pushltime = 0;
194         }
196         if(self.enemy.target)
197         {
198                 entity oldself;
199                 oldself = self;
200                 activator = other;
201                 self = self.enemy;
202                 SUB_UseTargets();
203                 self = oldself;
204         }
206         if (other.flags & FL_PROJECTILE)
207         {
208                 other.angles = vectoangles (other.velocity);
209                 switch(other.movetype)
210                 {
211                         case MOVETYPE_FLY:
212                                 other.movetype = MOVETYPE_TOSS;
213                                 other.gravity = 1;
214                                 break;
215                         case MOVETYPE_BOUNCEMISSILE:
216                                 other.movetype = MOVETYPE_BOUNCE;
217                                 other.gravity = 1;
218                                 break;
219                 }
220                 UpdateCSQCProjectile(other);
221         }
223         if (self.spawnflags & PUSH_ONCE)
224         {
225                 self.touch = SUB_Null;
226                 self.think = SUB_Remove;
227                 self.nextthink = time;
228         }
229 };
231 .vector dest;
233 void trigger_push_findtarget()
234 {
235         local entity e;
236         local vector org;
237         local float flighttime;
239         // first calculate a typical start point for the jump
240         org = (self.absmin + self.absmax) * 0.5;
241         org_z = self.absmax_z - PL_MIN_z;
243         if (self.target)
244         {
245                 // find the target
246                 self.enemy = find(world, targetname, self.target);
247                 if (!self.enemy)
248                 {
249                         objerror("trigger_push: target not found\n");
250                         remove(self);
251                         return;
252                 }
254                 self.movedir = trigger_push_calculatevelocity(org, self.enemy, self.height);
255                 flighttime = trigger_push_calculatevelocity_flighttime;
256         }
257         else
258                 flighttime = 0;
260         // calculate the destination and spawn a teleporter spawnfunc_waypoint
261         e = spawn();
262         setorigin(e, org);
263         setsize(e, PL_MIN, PL_MAX);
264         e.velocity = self.movedir;
265         tracetoss(e, e);
266         self.dest = trace_endpos;
267         remove(e);
269         waypoint_spawnforteleporter(self, self.dest, flighttime);
270 };
272 /*
273  * ENTITY PARAMETERS:
274  *
275  *   target:  target of jump
276  *   height:  the absolute value is the height of the highest point of the jump
277  *            trajectory above the higher one of the player and the target.
278  *            the sign indicates whether the highest point is INSIDE (positive)
279  *            or OUTSIDE (negative) of the jump trajectory. General rule: use
280  *            positive values for targets mounted on the floor, and use negative
281  *            values to target a point on the ceiling.
282  *   movedir: if target is not set, this * speed * 10 is the velocity to be reached.
283  */
284 void spawnfunc_trigger_push()
285 {
286         if (self.angles != '0 0 0')
287                 SetMovedir ();
289         EXACTTRIGGER_INIT;
291         self.use = trigger_push_use;
292         self.touch = trigger_push_touch;
294         // normal push setup
295         if (!self.speed)
296                 self.speed = 1000;
297         self.movedir = self.movedir * self.speed * 10;
299         if not(self.noise)