main/controls.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include <conf.h>
  16 #endif
  17
  18 #ifdef RCS
  19 static char rcsid[] = "$Id: controls.c,v 1.2 2001-01-31 15:17:49 bradleyb Exp $";
  20 #endif
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24
  25 #include "pstypes.h"
  26 #include "mono.h"
  27 #include "key.h"
  28 #include "joy.h"
  29 #include "timer.h"
  30 #include "error.h"
  31
  32 #include "inferno.h"
  33 #include "game.h"
  34 #include "object.h"
  35 #include "player.h"
  36
  37 #include "controls.h"
  38 #include "joydefs.h"
  39 #include "render.h"
  40 #include "args.h"
  41 #include "palette.h"
  42 #include "mouse.h"
  43 #include "kconfig.h"
  44 #include "laser.h"
  45 #include "multi.h"
  46 #include "vclip.h"
  47 #include "fireball.h"
  48
  49 //look at keyboard, mouse, joystick, CyberMan, whatever, and set
  50 //physics vars rotvel, velocity
  51
  52 fix Afterburner_charge=f1_0;
  53
  54 #define AFTERBURNER_USE_SECS    3                               //use up in 3 seconds
  55 #define DROP_DELTA_TIME                 (f1_0/15)       //drop 3 per second
  56
  57 extern int Drop_afterburner_blob_flag;          //ugly hack
  58
  59 extern fix      Seismic_tremor_magnitude;
  60
  61 void read_flying_controls( object * obj )
  62 {
  63         fix     forward_thrust_time;
  64
  65         Assert(FrameTime > 0);          //Get MATT if hit this!
  66
  67         if (Player_is_dead) {
  68                 vm_vec_zero(&obj->mtype.phys_info.rotthrust);
  69                 vm_vec_zero(&obj->mtype.phys_info.thrust);
  70                 return;
  71         }
  72
  73         if ((obj->type!=OBJ_PLAYER) || (obj->id!=Player_num)) return;   //references to player_ship require that this obj be the player
  74
  75         if (Guided_missile[Player_num] && Guided_missile[Player_num]->signature==Guided_missile_sig[Player_num]) {
  76                 vms_angvec rotangs;
  77                 vms_matrix rotmat,tempm;
  78                 fix speed;
  79
  80                 //this is a horrible hack.  guided missile stuff should not be
  81                 //handled in the middle of a routine that is dealing with the player
  82
  83                 vm_vec_zero(&obj->mtype.phys_info.rotthrust);
  84
  85                 rotangs.p = Controls.pitch_time / 2 + Seismic_tremor_magnitude/64;
  86                 rotangs.b = Controls.bank_time / 2 + Seismic_tremor_magnitude/16;
  87                 rotangs.h = Controls.heading_time / 2 + Seismic_tremor_magnitude/64;
  88
  89                 vm_angles_2_matrix(&rotmat,&rotangs);
  90
  91                 vm_matrix_x_matrix(&tempm,&Guided_missile[Player_num]->orient,&rotmat);
  92
  93                 Guided_missile[Player_num]->orient = tempm;
  94
  95                 speed = Weapon_info[Guided_missile[Player_num]->id].speed[Difficulty_level];
  96
  97                 vm_vec_copy_scale(&Guided_missile[Player_num]->mtype.phys_info.velocity,&Guided_missile[Player_num]->orient.fvec,speed);
  98 #ifdef NETWORK
  99                 if (Game_mode & GM_MULTI)
 100                         multi_send_guided_info (Guided_missile[Player_num],0);
 101 #endif
 102
 103         }
 104         else {
 105                 obj->mtype.phys_info.rotthrust.x = Controls.pitch_time;
 106                 obj->mtype.phys_info.rotthrust.y = Controls.heading_time;
 107                 obj->mtype.phys_info.rotthrust.z = Controls.bank_time;
 108         }
 109
 110 //      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) ));
 111
 112         forward_thrust_time = Controls.forward_thrust_time;
 113
 114         if (Players[Player_num].flags & PLAYER_FLAGS_AFTERBURNER)
 115         {
 116                 if (Controls.afterburner_state) {                       //player has key down
 117                         //if (forward_thrust_time >= 0) {               //..and isn't moving backward
 118                         {
 119                                 fix afterburner_scale;
 120                                 int old_count,new_count;
 121
 122                                 //add in value from 0..1
 123                                 afterburner_scale = f1_0 + min(f1_0/2,Afterburner_charge) * 2;
 124
 125                                 forward_thrust_time = fixmul(FrameTime,afterburner_scale);      //based on full thrust
 126
 127                                 old_count = (Afterburner_charge / (DROP_DELTA_TIME/AFTERBURNER_USE_SECS));
 128
 129                                 Afterburner_charge -= FrameTime/AFTERBURNER_USE_SECS;
 130
 131                                 if (Afterburner_charge < 0)
 132                                         Afterburner_charge = 0;
 133
 134                                 new_count = (Afterburner_charge / (DROP_DELTA_TIME/AFTERBURNER_USE_SECS));
 135
 136                                 if (old_count != new_count)
 137                                         Drop_afterburner_blob_flag = 1; //drop blob (after physics called)
 138                         }
 139                 }
 140                 else {
 141                         fix cur_energy,charge_up;
 142
 143                         //charge up to full
 144                         charge_up = min(FrameTime/8,f1_0 - Afterburner_charge); //recharge over 8 seconds
 145
 146                         cur_energy = max(Players[Player_num].energy-i2f(10),0); //don't drop below 10
 147
 148                         //maybe limit charge up by energy
 149                         charge_up = min(charge_up,cur_energy/10);
 150
 151                         Afterburner_charge += charge_up;
 152
 153                         Players[Player_num].energy -= charge_up * 100 / 10;     //full charge uses 10% of energy
 154                 }
 155         }
 156
 157         // Set object's thrust vector for forward/backward
 158         vm_vec_copy_scale(&obj->mtype.phys_info.thrust,&obj->orient.fvec, forward_thrust_time );
 159
 160         // slide left/right
 161         vm_vec_scale_add2(&obj->mtype.phys_info.thrust,&obj->orient.rvec, Controls.sideways_thrust_time );
 162
 163         // slide up/down
 164         vm_vec_scale_add2(&obj->mtype.phys_info.thrust,&obj->orient.uvec, Controls.vertical_thrust_time );
 165
 166         if (obj->mtype.phys_info.flags & PF_WIGGLE) {
 167                 fix swiggle;
 168                 fix_fastsincos(GameTime, &swiggle, NULL);
 169                 vm_vec_scale_add2(&obj->mtype.phys_info.velocity,&obj->orient.uvec,fixmul(swiggle,Player_ship->wiggle));
 170         }
 171
 172         // As of now, obj->mtype.phys_info.thrust & obj->mtype.phys_info.rotthrust are
 173         // in units of time... In other words, if thrust==FrameTime, that
 174         // means that the user was holding down the Max_thrust key for the
 175         // whole frame.  So we just scale them up by the max, and divide by
 176         // FrameTime to make them independant of framerate
 177
 178         //      Prevent divide overflows on high frame rates.
 179         //      In a signed divide, you get an overflow if num >= div<<15
 180         {
 181                 fix     ft = FrameTime;
 182
 183                 //      Note, you must check for ft < F1_0/2, else you can get an overflow  on the << 15.
 184                 if ((ft < F1_0/2) && (ft << 15 <= Player_ship->max_thrust)) {
 185                         mprintf((0, "Preventing divide overflow in controls.c for Max_thrust!\n"));
 186                         ft = (Player_ship->max_thrust >> 15) + 1;
 187                 }
 188
 189                 vm_vec_scale( &obj->mtype.phys_info.thrust, fixdiv(Player_ship->max_thrust,ft) );
 190
 191                 if ((ft < F1_0/2) && (ft << 15 <= Player_ship->max_rotthrust)) {
 192                         mprintf((0, "Preventing divide overflow in controls.c for max_rotthrust!\n"));
 193                         ft = (Player_ship->max_thrust >> 15) + 1;
 194                 }
 195
 196                 vm_vec_scale( &obj->mtype.phys_info.rotthrust, fixdiv(Player_ship->max_rotthrust,ft) );
 197         }
 198
 199 }