main/slew.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: slew.c,v 1.3 2001-01-31 15:17:57 bradleyb Exp $";
  20 #endif
  21
  22 #include <stdlib.h>
  23
  24 #include "inferno.h"
  25 #include "game.h"
  26 #include "vecmat.h"
  27 #include "key.h"
  28 #include "joy.h"
  29 #include "object.h"
  30 #include "error.h"
  31 #include "physics.h"
  32 #include "joydefs.h"
  33 #include "kconfig.h"
  34 #include "args.h"
  35
  36 //variables for slew system
  37
  38 object *slew_obj=NULL;  //what object is slewing, or NULL if none
  39
  40 #define JOY_NULL 15
  41 #define ROT_SPEED 8             //rate of rotation while key held down
  42 #define VEL_SPEED (2*55)        //rate of acceleration while key held down
  43
  44 short old_joy_x,old_joy_y;      //position last time around
  45
  46 //      Function Prototypes
  47 int slew_stop(void);
  48
  49
  50 // -------------------------------------------------------------------
  51 //say start slewing with this object
  52 void slew_init(object *obj)
  53 {
  54         slew_obj = obj;
  55
  56         slew_obj->control_type = CT_SLEW;
  57         slew_obj->movement_type = MT_NONE;
  58
  59         slew_stop();            //make sure not moving
  60 }
  61
  62
  63 int slew_stop()
  64 {
  65         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return 0;
  66
  67         vm_vec_zero(&slew_obj->mtype.phys_info.velocity);
  68         return 1;
  69 }
  70
  71 void slew_reset_orient()
  72 {
  73         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return;
  74
  75         slew_obj->orient.rvec.x = slew_obj->orient.uvec.y = slew_obj->orient.fvec.z = f1_0;
  76
  77         slew_obj->orient.rvec.y = slew_obj->orient.rvec.z = slew_obj->orient.uvec.x =
  78    slew_obj->orient.uvec.z = slew_obj->orient.fvec.x = slew_obj->orient.fvec.y = 0;
  79
  80 }
  81
  82 int do_slew_movement(object *obj, int check_keys, int check_joy )
  83 {
  84         int moved = 0;
  85         vms_vector svel, movement;                              //scaled velocity (per this frame)
  86         vms_matrix rotmat,new_pm;
  87         int joy_x,joy_y,btns;
  88         int joyx_moved,joyy_moved;
  89         vms_angvec rotang;
  90
  91         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return 0;
  92
  93         if (check_keys) {
  94                 if (Function_mode == FMODE_EDITOR) {
  95                         if (FindArg("-jasen"))
  96                                 obj->mtype.phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD3) - key_down_time(KEY_PAD1));
  97                         else
  98                                 obj->mtype.phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD9) - key_down_time(KEY_PAD7));
  99                         obj->mtype.phys_info.velocity.y += VEL_SPEED * (key_down_time(KEY_PADMINUS) - key_down_time(KEY_PADPLUS));
 100                         obj->mtype.phys_info.velocity.z += VEL_SPEED * (key_down_time(KEY_PAD8) - key_down_time(KEY_PAD2));
 101
 102                         rotang.p = (key_down_time(KEY_LBRACKET) - key_down_time(KEY_RBRACKET))/ROT_SPEED ;
 103                         if (FindArg("-jasen"))
 104                                 rotang.b  = (key_down_time(KEY_PAD7) - key_down_time(KEY_PAD9))/ROT_SPEED;
 105                         else
 106                                 rotang.b  = (key_down_time(KEY_PAD1) - key_down_time(KEY_PAD3))/ROT_SPEED;
 107                         rotang.h  = (key_down_time(KEY_PAD6) - key_down_time(KEY_PAD4))/ROT_SPEED;
 108                 }
 109                 else {
 110                         obj->mtype.phys_info.velocity.x += VEL_SPEED * Controls.sideways_thrust_time;
 111                         obj->mtype.phys_info.velocity.y += VEL_SPEED * Controls.vertical_thrust_time;
 112                         obj->mtype.phys_info.velocity.z += VEL_SPEED * Controls.forward_thrust_time;
 113
 114                         rotang.p = Controls.pitch_time/ROT_SPEED ;
 115                         rotang.b  = Controls.bank_time/ROT_SPEED;
 116                         rotang.h  = Controls.heading_time/ROT_SPEED;
 117                 }
 118         }
 119         else
 120                 rotang.p = rotang.b  = rotang.h  = 0;
 121
 122         //check for joystick movement
 123
 124         if (check_joy && joy_present && (Function_mode == FMODE_EDITOR) )       {
 125                 joy_get_pos(&joy_x,&joy_y);
 126                 btns=joy_get_btns();
 127
 128                 joyx_moved = (abs(joy_x - old_joy_x)>JOY_NULL);
 129                 joyy_moved = (abs(joy_y - old_joy_y)>JOY_NULL);
 130
 131                 if (abs(joy_x) < JOY_NULL) joy_x = 0;
 132                 if (abs(joy_y) < JOY_NULL) joy_y = 0;
 133
 134                 if (btns)
 135                         if (!rotang.p) rotang.p = fixmul(-joy_y * 512,FrameTime); else;
 136                 else
 137                         if (joyy_moved) obj->mtype.phys_info.velocity.z = -joy_y * 8192;
 138
 139                 if (!rotang.h) rotang.h = fixmul(joy_x * 512,FrameTime);
 140
 141                 if (joyx_moved) old_joy_x = joy_x;
 142                 if (joyy_moved) old_joy_y = joy_y;
 143         }
 144
 145         moved = rotang.p | rotang.b | rotang.h;
 146
 147         vm_angles_2_matrix(&rotmat,&rotang);
 148         vm_matrix_x_matrix(&new_pm,&obj->orient,&rotmat);
 149         obj->orient = new_pm;
 150         vm_transpose_matrix(&new_pm);           //make those columns rows
 151
 152         moved |= obj->mtype.phys_info.velocity.x | obj->mtype.phys_info.velocity.y | obj->mtype.phys_info.velocity.z;
 153
 154         svel = obj->mtype.phys_info.velocity;
 155         vm_vec_scale(&svel,FrameTime);          //movement in this frame
 156         vm_vec_rotate(&movement,&svel,&new_pm);
 157
 158 //      obj->last_pos = obj->pos;
 159         vm_vec_add2(&obj->pos,&movement);
 160
 161         moved |= (movement.x || movement.y || movement.z);
 162
 163         if (moved)
 164                 update_object_seg(obj); //update segment id
 165
 166         return moved;
 167 }
 168
 169 //do slew for this frame
 170 int slew_frame(int check_keys)
 171 {
 172         return do_slew_movement( slew_obj, !check_keys, 1 );
 173
 174 }
 175