qcsrc/common/triggers/subs.qc

   1 #include "subs.qh"
   2 void SUB_NullThink(entity this) { }
   3
   4 void SUB_CalcMoveDone(entity this);
   5 void SUB_CalcAngleMoveDone(entity this);
   6
   7 /*
   8 ==================
   9 SUB_Friction
  10
  11 Applies some friction to this
  12 ==================
  13 */
  14 .float friction;
  15 void SUB_Friction (entity this)
  16 {
  17         this.nextthink = time;
  18         if(IS_ONGROUND(this))
  19                 this.velocity = this.velocity * (1 - frametime * this.friction);
  20 }
  21
  22 /*
  23 ==================
  24 SUB_VanishOrRemove
  25
  26 Makes client invisible or removes non-client
  27 ==================
  28 */
  29 void SUB_VanishOrRemove (entity ent)
  30 {
  31         if (IS_CLIENT(ent))
  32         {
  33                 // vanish
  34                 ent.alpha = -1;
  35                 ent.effects = 0;
  36 #ifdef SVQC
  37                 ent.glow_size = 0;
  38                 ent.pflags = 0;
  39 #endif
  40         }
  41         else
  42         {
  43                 // remove
  44                 delete (ent);
  45         }
  46 }
  47
  48 void SUB_SetFade_Think (entity this)
  49 {
  50         if(this.alpha == 0)
  51                 this.alpha = 1;
  52         setthink(this, SUB_SetFade_Think);
  53         this.nextthink = time;
  54         this.alpha -= frametime * this.fade_rate;
  55         if (this.alpha < 0.01)
  56                 SUB_VanishOrRemove(this);
  57         else
  58                 this.nextthink = time;
  59 }
  60
  61 /*
  62 ==================
  63 SUB_SetFade
  64
  65 Fade 'ent' out when time >= 'when'
  66 ==================
  67 */
  68 void SUB_SetFade (entity ent, float when, float fading_time)
  69 {
  70         ent.fade_rate = 1/fading_time;
  71         setthink(ent, SUB_SetFade_Think);
  72         ent.nextthink = when;
  73 }
  74
  75 /*
  76 =============
  77 SUB_CalcMove
  78
  79 calculate this.velocity and this.nextthink to reach dest from
  80 this.origin traveling at speed
  81 ===============
  82 */
  83 void SUB_CalcMoveDone(entity this)
  84 {
  85         // After moving, set origin to exact final destination
  86
  87         setorigin (this, this.finaldest);
  88         this.velocity = '0 0 0';
  89         this.nextthink = -1;
  90         if (this.think1 && this.think1 != SUB_CalcMoveDone)
  91                 this.think1 (this);
  92 }
  93
  94 .float platmovetype_turn;
  95 void SUB_CalcMove_controller_think (entity this)
  96 {
  97         float traveltime;
  98         float phasepos;
  99         float nexttick;
 100         vector delta;
 101         vector delta2;
 102         vector veloc;
 103         vector angloc;
 104         vector nextpos;
 105         delta = this.destvec;
 106         delta2 = this.destvec2;
 107         if(time < this.animstate_endtime)
 108         {
 109                 nexttick = time + PHYS_INPUT_FRAMETIME;
 110
 111                 traveltime = this.animstate_endtime - this.animstate_starttime;
 112                 phasepos = (nexttick - this.animstate_starttime) / traveltime; // range: [0, 1]
 113                 phasepos = cubic_speedfunc(this.platmovetype_start, this.platmovetype_end, phasepos);
 114                 nextpos = this.origin + (delta * phasepos) + (delta2 * phasepos * phasepos);
 115                 // derivative: delta + 2 * delta2 * phasepos (e.g. for angle positioning)
 116
 117                 if(this.owner.platmovetype_turn)
 118                 {
 119                         vector destangle;
 120                         destangle = delta + 2 * delta2 * phasepos;
 121                         destangle = vectoangles(destangle);
 122                         destangle_x = -destangle_x; // flip up / down orientation
 123
 124                         // take the shortest distance for the angles
 125                         vector v = this.owner.angles;
 126                         v.x -= 360 * floor((v.x - destangle_x) / 360 + 0.5);
 127                         v.y -= 360 * floor((v.y - destangle_y) / 360 + 0.5);
 128                         v.z -= 360 * floor((v.z - destangle_z) / 360 + 0.5);
 129                         this.owner.angles = v;
 130                         angloc = destangle - this.owner.angles;
 131                         angloc = angloc * (1 / PHYS_INPUT_FRAMETIME); // so it arrives for the next frame
 132                         this.owner.avelocity = angloc;
 133                 }
 134                 if(nexttick < this.animstate_endtime)
 135                         veloc = nextpos - this.owner.origin;
 136                 else
 137                         veloc = this.finaldest - this.owner.origin;
 138                 veloc = veloc * (1 / PHYS_INPUT_FRAMETIME); // so it arrives for the next frame
 139
 140                 this.owner.velocity = veloc;
 141                 this.nextthink = nexttick;
 142         }
 143         else
 144         {
 145                 // derivative: delta + 2 * delta2 (e.g. for angle positioning)
 146                 entity own = this.owner;
 147                 setthink(own, this.think1);
 148                 delete(this);
 149                 getthink(own)(own);
 150         }
 151 }
 152
 153 void SUB_CalcMove_controller_setbezier (entity controller, vector org, vector control, vector destin)
 154 {
 155         // 0 * (1-t) * (1-t) + 2 * control * t * (1-t) + destin * t * t
 156         // 2 * control * t - 2 * control * t * t + destin * t * t
 157         // 2 * control * t + (destin - 2 * control) * t * t
 158
 159         setorigin(controller, org);
 160         control -= org;
 161         destin -= org;
 162
 163         controller.destvec = 2 * control; // control point
 164         controller.destvec2 = destin - 2 * control; // quadratic part required to reach end point
 165         // also: initial d/dphasepos origin = 2 * control, final speed = 2 * (destin - control)
 166 }
 167
 168 void SUB_CalcMove_controller_setlinear (entity controller, vector org, vector destin)
 169 {
 170         // 0 * (1-t) * (1-t) + 2 * control * t * (1-t) + destin * t * t
 171         // 2 * control * t - 2 * control * t * t + destin * t * t
 172         // 2 * control * t + (destin - 2 * control) * t * t
 173
 174         setorigin(controller, org);
 175         destin -= org;
 176
 177         controller.destvec = destin; // end point
 178         controller.destvec2 = '0 0 0';
 179 }
 180
 181 float TSPEED_TIME = -1;
 182 float TSPEED_LINEAR = 0;
 183 float TSPEED_START = 1;
 184 float TSPEED_END = 2;
 185 // TODO average too?
 186
 187 void SUB_CalcMove_Bezier (entity this, vector tcontrol, vector tdest, float tspeedtype, float tspeed, void(entity this) func)
 188 {
 189         float   traveltime;
 190         entity controller;
 191
 192         if (!tspeed)
 193                 objerror (this, "No speed is defined!");
 194
 195         this.think1 = func;
 196         this.finaldest = tdest;
 197         setthink(this, SUB_CalcMoveDone);
 198
 199         switch(tspeedtype)
 200         {
 201                 default:
 202                 case TSPEED_START:
 203                         traveltime = 2 * vlen(tcontrol - this.origin) / tspeed;
 204                         break;
 205                 case TSPEED_END:
 206                         traveltime = 2 * vlen(tcontrol - tdest)       / tspeed;
 207                         break;
 208                 case TSPEED_LINEAR:
 209                         traveltime = vlen(tdest - this.origin)        / tspeed;
 210                         break;
 211                 case TSPEED_TIME:
 212                         traveltime = tspeed;
 213                         break;
 214         }
 215
 216         if (traveltime < 0.1) // useless anim
 217         {
 218                 this.velocity = '0 0 0';
 219                 this.nextthink = this.ltime + 0.1;
 220                 return;
 221         }
 222
 223         controller = new(SUB_CalcMove_controller);
 224         controller.owner = this;
 225         controller.platmovetype = this.platmovetype;
 226         controller.platmovetype_start = this.platmovetype_start;
 227         controller.platmovetype_end = this.platmovetype_end;
 228         SUB_CalcMove_controller_setbezier(controller, this.origin, tcontrol, tdest);
 229         controller.finaldest = (tdest + '0 0 0.125'); // where do we want to end? Offset to overshoot a bit.
 230         controller.animstate_starttime = time;
 231         controller.animstate_endtime = time + traveltime;
 232         setthink(controller, SUB_CalcMove_controller_think);
 233         controller.think1 = getthink(this);
 234
 235         // the thinking is now done by the controller
 236         setthink(this, SUB_NullThink); // for PushMove
 237         this.nextthink = this.ltime + traveltime;
 238
 239         // invoke controller
 240         getthink(controller)(controller);
 241 }
 242
 243 void SUB_CalcMove (entity this, vector tdest, float tspeedtype, float tspeed, void(entity this) func)
 244 {
 245         vector  delta;
 246         float   traveltime;
 247
 248         if (!tspeed)
 249                 objerror (this, "No speed is defined!");
 250
 251         this.think1 = func;
 252         this.finaldest = tdest;
 253         setthink(this, SUB_CalcMoveDone);
 254
 255         if (tdest == this.origin)
 256         {
 257                 this.velocity = '0 0 0';
 258                 this.nextthink = this.ltime + 0.1;
 259                 return;
 260         }
 261
 262         delta = tdest - this.origin;
 263
 264         switch(tspeedtype)
 265         {
 266                 default:
 267                 case TSPEED_START:
 268                 case TSPEED_END:
 269                 case TSPEED_LINEAR:
 270                         traveltime = vlen (delta) / tspeed;
 271                         break;
 272                 case TSPEED_TIME:
 273                         traveltime = tspeed;
 274                         break;
 275         }
 276
 277         // Very short animations don't really show off the effect
 278         // of controlled animation, so let's just use linear movement.
 279         // Alternatively entities can choose to specify non-controlled movement.
 280         // The only currently implemented alternative movement is linear (value 1)
 281         if (traveltime < 0.15 || (this.platmovetype_start == 1 && this.platmovetype_end == 1)) // is this correct?
 282         {
 283                 this.velocity = delta * (1/traveltime); // QuakeC doesn't allow vector/float division
 284                 this.nextthink = this.ltime + traveltime;
 285                 return;
 286         }
 287
 288         // now just run like a bezier curve...
 289         SUB_CalcMove_Bezier(this, (this.origin + tdest) * 0.5, tdest, tspeedtype, tspeed, func);
 290 }
 291
 292 void SUB_CalcMoveEnt (entity ent, vector tdest, float tspeedtype, float tspeed, void(entity this) func)
 293 {
 294         SUB_CalcMove(ent, tdest, tspeedtype, tspeed, func);
 295 }
 296
 297 /*
 298 =============
 299 SUB_CalcAngleMove
 300
 301 calculate this.avelocity and this.nextthink to reach destangle from
 302 this.angles rotating
 303
 304 The calling function should make sure this.setthink is valid
 305 ===============
 306 */
 307 void SUB_CalcAngleMoveDone(entity this)
 308 {
 309         // After rotating, set angle to exact final angle
 310         this.angles = this.finalangle;
 311         this.avelocity = '0 0 0';
 312         this.nextthink = -1;
 313         if (this.think1 && this.think1 != SUB_CalcAngleMoveDone) // avoid endless loops
 314                 this.think1 (this);
 315 }
 316
 317 // FIXME: I fixed this function only for rotation around the main axes
 318 void SUB_CalcAngleMove (entity this, vector destangle, float tspeedtype, float tspeed, void(entity this) func)
 319 {
 320         if (!tspeed)
 321                 objerror (this, "No speed is defined!");
 322
 323         // take the shortest distance for the angles
 324         this.angles_x -= 360 * floor((this.angles_x - destangle_x) / 360 + 0.5);
 325         this.angles_y -= 360 * floor((this.angles_y - destangle_y) / 360 + 0.5);
 326         this.angles_z -= 360 * floor((this.angles_z - destangle_z) / 360 + 0.5);
 327         vector delta = destangle - this.angles;
 328         float traveltime;
 329
 330         switch(tspeedtype)
 331         {
 332                 default:
 333                 case TSPEED_START:
 334                 case TSPEED_END:
 335                 case TSPEED_LINEAR:
 336                         traveltime = vlen (delta) / tspeed;
 337                         break;
 338                 case TSPEED_TIME:
 339                         traveltime = tspeed;
 340                         break;
 341         }
 342
 343         this.think1 = func;
 344         this.finalangle = destangle;
 345         setthink(this, SUB_CalcAngleMoveDone);
 346
 347         if (traveltime < 0.1)
 348         {
 349                 this.avelocity = '0 0 0';
 350                 this.nextthink = this.ltime + 0.1;
 351                 return;
 352         }
 353
 354         this.avelocity = delta * (1 / traveltime);
 355         this.nextthink = this.ltime + traveltime;
 356 }
 357
 358 void SUB_CalcAngleMoveEnt (entity ent, vector destangle, float tspeedtype, float tspeed, void(entity this) func)
 359 {
 360         SUB_CalcAngleMove (ent, destangle, tspeedtype, tspeed, func);
 361 }