qcsrc/server/mutators/mutator_dodging.qc

   1
   2 .float cvar_cl_dodging_timeout;
   3
   4
   5 // these are used to store the last key press time for each of the keys..
   6 .float last_FORWARD_KEY_time;
   7 .float last_BACKWARD_KEY_time;
   8 .float last_LEFT_KEY_time;
   9 .float last_RIGHT_KEY_time;
  10
  11 // these store the movement direction at the time of the dodge action happening.
  12 .float dodging_direction_x;
  13 .float dodging_direction_y;
  14
  15 // this indicates the last time a dodge was executed. used to check if another one is allowed
  16 // and to ramp up the dodge acceleration in the physics hook.
  17 .float last_dodging_time;
  18
  19 // set to 1 to indicate dodging has started.. reset by physics hook after dodge has been done..
  20 .float dodging_action;
  21
  22 // This is the velocity gain to be added over the ramp time.
  23 // It will decrease from frame to frame during dodging_action = 1
  24 // until it's 0.
  25 .float dodging_velocity_gain;
  26
  27 // the jump part of the dodge cannot be ramped
  28 .float dodging_single_action;
  29
  30 void dodging_Initialize() {
  31         // print("dodging_Initialize\n");
  32
  33         self.last_FORWARD_KEY_time = 0;
  34         self.last_BACKWARD_KEY_time = 0;
  35         self.last_RIGHT_KEY_time = 0;
  36         self.last_LEFT_KEY_time = 0;
  37         self.last_dodging_time = 0;
  38         self.dodging_action = 0;
  39         self.dodging_velocity_gain = 0;
  40         self.dodging_single_action = 0;
  41         self.dodging_direction_x = 0;
  42         self.dodging_direction_y = 0;
  43 }
  44
  45 MUTATOR_HOOKFUNCTION(dodging_GetCvars) {
  46         GetCvars_handleFloat(get_cvars_s, get_cvars_f, cvar_cl_dodging_timeout, "cl_dodging_timeout");
  47         return 0;
  48 }
  49
  50 MUTATOR_HOOKFUNCTION(dodging_PlayerPhysics) {
  51         // print("dodging_PlayerPhysics\n");
  52
  53         float common_factor;
  54         float new_velocity_gain;
  55         float velocity_difference;
  56         float clean_up_and_do_nothing;
  57
  58         new_velocity_gain = 0;
  59         clean_up_and_do_nothing = 0;
  60
  61         if (g_dodging == 0)
  62                 clean_up_and_do_nothing = 1;
  63
  64         // when swimming, no dodging allowed..
  65         if (self.waterlevel >= WATERLEVEL_SWIMMING)
  66                 clean_up_and_do_nothing = 1;
  67
  68         if (clean_up_and_do_nothing != 0) {
  69                 self.dodging_action = 0;
  70                 self.dodging_direction_x = 0;
  71                 self.dodging_direction_y = 0;
  72                 return 0;
  73         }
  74
  75         // make sure v_up, v_right and v_forward are sane
  76         makevectors(self.angles);
  77
  78         // if we have e.g. 0.5 sec ramptime and a frametime of 0.25, then the ramp code
  79         // will be called ramp_time/frametime times = 2 times. so, we need to
  80         // add 0.5 * the total speed each frame until the dodge action is done..
  81         common_factor = sys_frametime / autocvar_sv_dodging_ramp_time;
  82
  83         // if ramp time is smaller than frametime we get problems ;D
  84         if (common_factor > 1)
  85                 common_factor = 1;
  86
  87         new_velocity_gain = self.dodging_velocity_gain - (common_factor * autocvar_sv_dodging_horiz_speed);
  88         if (new_velocity_gain < 0)
  89                 new_velocity_gain = 0;
  90
  91         velocity_difference = self.dodging_velocity_gain - new_velocity_gain;
  92
  93         // ramp up dodging speed by adding some velocity each frame.. TODO: do it! :D
  94         if (self.dodging_action == 1) {
  95                 //disable jump key during dodge accel phase
  96                 if (self.movement_z > 0) self.movement_z = 0;
  97
  98                 self.velocity =
  99                           self.velocity
 100                         + ((self.dodging_direction_y * velocity_difference) * v_right)
 101                         + ((self.dodging_direction_x * velocity_difference) * v_forward);
 102
 103                 self.dodging_velocity_gain = self.dodging_velocity_gain - velocity_difference;
 104         }
 105
 106         // the up part of the dodge is a single shot action
 107         if (self.dodging_single_action == 1) {
 108                 self.flags &~= FL_ONGROUND;
 109
 110                 self.velocity =
 111                           self.velocity
 112                         + (autocvar_sv_dodging_up_speed * v_up);
 113
 114                 if (autocvar_sv_dodging_sound == 1)
 115                         PlayerSound(playersound_jump, CHAN_PLAYER, VOICETYPE_PLAYERSOUND);
 116
 117                 setanim(self, self.anim_jump, TRUE, FALSE, TRUE);
 118
 119                 self.dodging_single_action = 0;
 120         }
 121
 122         // are we done with the dodging ramp yet?
 123         if((self.dodging_action == 1) && ((time - self.last_dodging_time) > autocvar_sv_dodging_ramp_time))
 124         {
 125                 // reset state so next dodge can be done correctly
 126                 self.dodging_action = 0;
 127                 self.dodging_direction_x = 0;
 128                 self.dodging_direction_y = 0;
 129         }
 130
 131         return 0;
 132 }
 133
 134
 135 // returns 1 if the player is close to a wall
 136 float check_close_to_wall(float threshold) {
 137         if (autocvar_sv_dodging_wall_dodging == 0)
 138                 return 0;
 139
 140         vector trace_start;
 141         vector trace_end;
 142
 143         trace_start = self.origin;
 144
 145         trace_end = self.origin + (1000*v_right);
 146         tracebox(trace_start, self.mins, self.maxs, trace_end, TRUE, self);
 147         if (trace_fraction < 1 && vlen (self.origin - trace_endpos) < threshold)
 148                 return 1;
 149
 150         trace_end = self.origin - (1000*v_right);
 151         tracebox(trace_start, self.mins, self.maxs, trace_end, TRUE, self);
 152         if (trace_fraction < 1 && vlen (self.origin - trace_endpos) < threshold)
 153                 return 1;
 154
 155         trace_end = self.origin + (1000*v_forward);
 156         tracebox(trace_start, self.mins, self.maxs, trace_end, TRUE, self);
 157         if (trace_fraction < 1 && vlen (self.origin - trace_endpos) < threshold)
 158                 return 1;
 159
 160         trace_end = self.origin - (1000*v_forward);
 161         tracebox(trace_start, self.mins, self.maxs, trace_end, TRUE, self);
 162         if (trace_fraction < 1 && vlen (self.origin - trace_endpos) < threshold)
 163                 return 1;
 164
 165         return 0;
 166 }
 167
 168 float check_close_to_ground(float threshold) {
 169         if (self.flags & FL_ONGROUND)
 170                 return 1;
 171
 172         return 0;
 173 }
 174
 175
 176 MUTATOR_HOOKFUNCTION(dodging_GetPressedKeys) {
 177         // print("dodging_PlayerPhysics\n");
 178
 179         float length;
 180         float tap_direction_x;
 181         float tap_direction_y;
 182
 183         tap_direction_x = 0;
 184         tap_direction_y = 0;
 185
 186         float dodge_detected;
 187         if (g_dodging == 0)
 188                 return 0;
 189
 190         dodge_detected = 0;
 191
 192         // first check if the last dodge is far enough back in time so we can dodge again
 193         if ((time - self.last_dodging_time) < autocvar_sv_dodging_delay)
 194                 return 0;
 195
 196         if (check_close_to_ground(autocvar_sv_dodging_height_threshold) != 1
 197                 && check_close_to_wall(autocvar_sv_dodging_wall_distance_threshold) != 1)
 198                 return 0;
 199
 200         if (self.movement_x > 0) {
 201                 // is this a state change?
 202                 if (!(self.pressedkeys & KEY_FORWARD)) {
 203                         if ((time - self.last_FORWARD_KEY_time) < self.cvar_cl_dodging_timeout) {
 204                                 tap_direction_x = 1.0;
 205                                 dodge_detected = 1;
 206                         }
 207                         self.last_FORWARD_KEY_time = time;
 208                 }
 209         }
 210
 211         if (self.movement_x < 0) {
 212                 // is this a state change?
 213                 if (!(self.pressedkeys & KEY_BACKWARD)) {
 214                         tap_direction_x = -1.0;
 215                         if ((time - self.last_BACKWARD_KEY_time) < self.cvar_cl_dodging_timeout)        {
 216                                 dodge_detected = 1;
 217                         }
 218                         self.last_BACKWARD_KEY_time = time;
 219                 }
 220         }
 221
 222         if (self.movement_y > 0) {
 223                 // is this a state change?
 224                 if (!(self.pressedkeys & KEY_RIGHT)) {
 225                         tap_direction_y = 1.0;
 226                         if ((time - self.last_RIGHT_KEY_time) < self.cvar_cl_dodging_timeout)   {
 227                                 dodge_detected = 1;
 228                         }
 229                         self.last_RIGHT_KEY_time = time;
 230                 }
 231         }
 232
 233         if (self.movement_y < 0) {
 234                 // is this a state change?
 235                 if (!(self.pressedkeys & KEY_LEFT)) {
 236                         tap_direction_y = -1.0;
 237                         if ((time - self.last_LEFT_KEY_time) < self.cvar_cl_dodging_timeout)    {
 238                                 dodge_detected = 1;
 239                         }
 240                         self.last_LEFT_KEY_time = time;
 241                 }
 242         }
 243
 244
 245
 246         if (dodge_detected == 1) {
 247                 self.last_dodging_time = time;
 248
 249                 self.dodging_action = 1;
 250                 self.dodging_single_action = 1;
 251
 252                 self.dodging_velocity_gain = autocvar_sv_dodging_horiz_speed;
 253
 254                 self.dodging_direction_x = tap_direction_x;
 255                 self.dodging_direction_y = tap_direction_y;
 256
 257                 // normalize the dodging_direction vector.. (unlike UT99) XD
 258                 length = length + self.dodging_direction_x * self.dodging_direction_x;
 259                 length = length + self.dodging_direction_y * self.dodging_direction_y;
 260                 length = sqrt(length);
 261
 262                 self.dodging_direction_x = self.dodging_direction_x * 1.0/length;
 263                 self.dodging_direction_y = self.dodging_direction_y * 1.0/length;
 264         }
 265
 266         return 0;
 267 }
 268
 269 MUTATOR_DEFINITION(mutator_dodging)
 270 {
 271         // we need to be called before GetPressedKey does its thing so we can
 272         // detect state changes and therefore dodging actions..
 273         MUTATOR_HOOK(GetPressedKeys, dodging_GetPressedKeys, CBC_ORDER_ANY);
 274
 275         // in the physics hook we actually implement the dodge..
 276         MUTATOR_HOOK(PlayerPhysics, dodging_PlayerPhysics, CBC_ORDER_ANY);
 277
 278         // get timeout information from the client, so the client can configure it..
 279         MUTATOR_HOOK(GetCvars, dodging_GetCvars, CBC_ORDER_ANY);
 280
 281         // this just turns on the cvar.
 282         MUTATOR_ONADD
 283         {
 284                 g_dodging = 1;
 285                 dodging_Initialize();
 286         }
 287
 288         // this just turns off the cvar.
 289         MUTATOR_ONREMOVE
 290         {
 291                 g_dodging = 0;
 292         }
 293
 294         return 0;
 295 }