main/controls.c

   1 /* $Id: controls.c,v 1.7 2004-08-28 23:17:45 schaffner Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 /*
  16  *
  17  * Code for controlling player movement
  18  *
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <conf.h>
  23 #endif
  24
  25 #ifdef RCS
  26 static char rcsid[] = "$Id: controls.c,v 1.7 2004-08-28 23:17:45 schaffner Exp $";
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31
  32 #include "pstypes.h"
  33 #include "mono.h"
  34 #include "key.h"
  35 #include "joy.h"
  36 #include "timer.h"
  37 #include "error.h"
  38
  39 #include "inferno.h"
  40 #include "game.h"
  41 #include "object.h"
  42 #include "player.h"
  43
  44 #include "controls.h"
  45 #include "joydefs.h"
  46 #include "render.h"
  47 #include "args.h"
  48 #include "palette.h"
  49 #include "mouse.h"
  50 #include "kconfig.h"
  51 #include "laser.h"
  52 #ifdef NETWORK
  53 #include "multi.h"
  54 #endif
  55 #include "vclip.h"
  56 #include "fireball.h"
  57
  58 //look at keyboard, mouse, joystick, CyberMan, whatever, and set
  59 //physics vars rotvel, velocity
  60
  61 fix Afterburner_charge=f1_0;
  62
  63 #define AFTERBURNER_USE_SECS    3                               //use up in 3 seconds
  64 #define DROP_DELTA_TIME                 (f1_0/15)       //drop 3 per second
  65
  66 extern int Drop_afterburner_blob_flag;          //ugly hack
  67
  68 extern fix      Seismic_tremor_magnitude;
  69
  70 void read_flying_controls( object * obj )
  71 {
  72         fix     forward_thrust_time;
  73
  74         Assert(FrameTime > 0);          //Get MATT if hit this!
  75
  76 // this section commented and moved to the bottom by WraithX
  77 //      if (Player_is_dead) {
  78 //              vm_vec_zero(&obj->mtype.phys_info.rotthrust);
  79 //              vm_vec_zero(&obj->mtype.phys_info.thrust);
  80 //              return;
  81 //      }
  82 // end of section to be moved.
  83
  84         if ((obj->type!=OBJ_PLAYER) || (obj->id!=Player_num)) return;   //references to player_ship require that this obj be the player
  85
  86         if (Guided_missile[Player_num] && Guided_missile[Player_num]->signature==Guided_missile_sig[Player_num]) {
  87                 vms_angvec rotangs;
  88                 vms_matrix rotmat,tempm;
  89                 fix speed;
  90
  91                 //this is a horrible hack.  guided missile stuff should not be
  92                 //handled in the middle of a routine that is dealing with the player
  93
  94                 vm_vec_zero(&obj->mtype.phys_info.rotthrust);
  95
  96                 rotangs.p = Controls.pitch_time / 2 + Seismic_tremor_magnitude/64;
  97                 rotangs.b = Controls.bank_time / 2 + Seismic_tremor_magnitude/16;
  98                 rotangs.h = Controls.heading_time / 2 + Seismic_tremor_magnitude/64;
  99
 100                 vm_angles_2_matrix(&rotmat,&rotangs);
 101
 102                 vm_matrix_x_matrix(&tempm,&Guided_missile[Player_num]->orient,&rotmat);
 103
 104                 Guided_missile[Player_num]->orient = tempm;
 105
 106                 speed = Weapon_info[Guided_missile[Player_num]->id].speed[Difficulty_level];
 107
 108                 vm_vec_copy_scale(&Guided_missile[Player_num]->mtype.phys_info.velocity,&Guided_missile[Player_num]->orient.fvec,speed);
 109 #ifdef NETWORK
 110                 if (Game_mode & GM_MULTI)
 111                         multi_send_guided_info (Guided_missile[Player_num],0);
 112 #endif
 113
 114         }
 115         else {
 116                 obj->mtype.phys_info.rotthrust.x = Controls.pitch_time;
 117                 obj->mtype.phys_info.rotthrust.y = Controls.heading_time;
 118                 obj->mtype.phys_info.rotthrust.z = Controls.bank_time;
 119         }
 120
 121 //      mprintf( (0, "Rot thrust = %.3f,%.3f,%.3f\n", f2fl(obj->mtype.phys_info.rotthrust.x),f2fl(obj->mtype.phys_info.rotthrust.y), f2fl(obj->mtype.phys_info.rotthrust.z) ));
 122
 123         forward_thrust_time = Controls.forward_thrust_time;
 124
 125         if (Players[Player_num].flags & PLAYER_FLAGS_AFTERBURNER)
 126         {
 127                 if (Controls.afterburner_state) {                       //player has key down
 128                         //if (forward_thrust_time >= 0) {               //..and isn't moving backward
 129                         {
 130                                 fix afterburner_scale;
 131                                 int old_count,new_count;
 132
 133                                 //add in value from 0..1
 134                                 afterburner_scale = f1_0 + min(f1_0/2,Afterburner_charge) * 2;
 135
 136                                 forward_thrust_time = fixmul(FrameTime,afterburner_scale);      //based on full thrust
 137
 138                                 old_count = (Afterburner_charge / (DROP_DELTA_TIME/AFTERBURNER_USE_SECS));
 139
 140                                 Afterburner_charge -= FrameTime/AFTERBURNER_USE_SECS;
 141
 142                                 if (Afterburner_charge < 0)
 143                                         Afterburner_charge = 0;
 144
 145                                 new_count = (Afterburner_charge / (DROP_DELTA_TIME/AFTERBURNER_USE_SECS));
 146
 147                                 if (old_count != new_count)
 148                                         Drop_afterburner_blob_flag = 1; //drop blob (after physics called)
 149                         }
 150                 }
 151                 else {
 152                         fix cur_energy,charge_up;
 153
 154                         //charge up to full
 155                         charge_up = min(FrameTime/8,f1_0 - Afterburner_charge); //recharge over 8 seconds
 156
 157                         cur_energy = max(Players[Player_num].energy-i2f(10),0); //don't drop below 10
 158
 159                         //maybe limit charge up by energy
 160                         charge_up = min(charge_up,cur_energy/10);
 161
 162                         Afterburner_charge += charge_up;
 163
 164                         Players[Player_num].energy -= charge_up * 100 / 10;     //full charge uses 10% of energy
 165                 }
 166         }
 167
 168         // Set object's thrust vector for forward/backward
 169         vm_vec_copy_scale(&obj->mtype.phys_info.thrust,&obj->orient.fvec, forward_thrust_time );
 170
 171         // slide left/right
 172         vm_vec_scale_add2(&obj->mtype.phys_info.thrust,&obj->orient.rvec, Controls.sideways_thrust_time );
 173
 174         // slide up/down
 175         vm_vec_scale_add2(&obj->mtype.phys_info.thrust,&obj->orient.uvec, Controls.vertical_thrust_time );
 176
 177         if (obj->mtype.phys_info.flags & PF_WIGGLE)
 178         {
 179                 fix swiggle;
 180                 fix_fastsincos(GameTime, &swiggle, NULL);
 181                 if (FrameTime < F1_0) // Only scale wiggle if getting at least 1 FPS, to avoid causing the opposite problem.
 182                         swiggle = fixmul(swiggle*20, FrameTime); //make wiggle fps-independent (based on pre-scaled amount of wiggle at 20 FPS)
 183                 vm_vec_scale_add2(&obj->mtype.phys_info.velocity,&obj->orient.uvec,fixmul(swiggle,Player_ship->wiggle));
 184         }
 185
 186         // As of now, obj->mtype.phys_info.thrust & obj->mtype.phys_info.rotthrust are
 187         // in units of time... In other words, if thrust==FrameTime, that
 188         // means that the user was holding down the Max_thrust key for the
 189         // whole frame.  So we just scale them up by the max, and divide by
 190         // FrameTime to make them independant of framerate
 191
 192         //      Prevent divide overflows on high frame rates.
 193         //      In a signed divide, you get an overflow if num >= div<<15
 194         {
 195                 fix     ft = FrameTime;
 196
 197                 //      Note, you must check for ft < F1_0/2, else you can get an overflow  on the << 15.
 198                 if ((ft < F1_0/2) && (ft << 15 <= Player_ship->max_thrust)) {
 199                         mprintf((0, "Preventing divide overflow in controls.c for Max_thrust!\n"));
 200                         ft = (Player_ship->max_thrust >> 15) + 1;
 201                 }
 202
 203                 vm_vec_scale( &obj->mtype.phys_info.thrust, fixdiv(Player_ship->max_thrust,ft) );
 204
 205                 if ((ft < F1_0/2) && (ft << 15 <= Player_ship->max_rotthrust)) {
 206                         mprintf((0, "Preventing divide overflow in controls.c for max_rotthrust!\n"));
 207                         ft = (Player_ship->max_thrust >> 15) + 1;
 208                 }
 209
 210                 vm_vec_scale( &obj->mtype.phys_info.rotthrust, fixdiv(Player_ship->max_rotthrust,ft) );
 211         }
 212
 213         // moved here by WraithX
 214         if (Player_is_dead)
 215         {
 216                 //vm_vec_zero(&obj->mtype.phys_info.rotthrust); // let dead players rotate, changed by WraithX
 217                 vm_vec_zero(&obj->mtype.phys_info.thrust);  // don't let dead players move, changed by WraithX
 218                 return;
 219         }// end if
 220
 221 }