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 RCS
  15 static char rcsid[] = "$Id: slew.c,v 1.2 2001-01-24 04:29:48 bradleyb Exp $";
  16 #endif
  17
  18 #include <conf.h>
  19 #include <stdlib.h>
  20
  21 #include "inferno.h"
  22 #include "game.h"
  23 #include "vecmat.h"
  24 #include "key.h"
  25 #include "joy.h"
  26 #include "object.h"
  27 #include "error.h"
  28 #include "physics.h"
  29 #include "joydefs.h"
  30 #include "kconfig.h"
  31 #include "args.h"
  32
  33 //variables for slew system
  34
  35 object *slew_obj=NULL;  //what object is slewing, or NULL if none
  36
  37 #define JOY_NULL 15
  38 #define ROT_SPEED 8             //rate of rotation while key held down
  39 #define VEL_SPEED (2*55)        //rate of acceleration while key held down
  40
  41 short old_joy_x,old_joy_y;      //position last time around
  42
  43 //      Function Prototypes
  44 int slew_stop(void);
  45
  46
  47 // -------------------------------------------------------------------
  48 //say start slewing with this object
  49 void slew_init(object *obj)
  50 {
  51         slew_obj = obj;
  52
  53         slew_obj->control_type = CT_SLEW;
  54         slew_obj->movement_type = MT_NONE;
  55
  56         slew_stop();            //make sure not moving
  57 }
  58
  59
  60 int slew_stop()
  61 {
  62         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return 0;
  63
  64         vm_vec_zero(&slew_obj->mtype.phys_info.velocity);
  65         return 1;
  66 }
  67
  68 void slew_reset_orient()
  69 {
  70         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return;
  71
  72         slew_obj->orient.rvec.x = slew_obj->orient.uvec.y = slew_obj->orient.fvec.z = f1_0;
  73
  74         slew_obj->orient.rvec.y = slew_obj->orient.rvec.z = slew_obj->orient.uvec.x =
  75    slew_obj->orient.uvec.z = slew_obj->orient.fvec.x = slew_obj->orient.fvec.y = 0;
  76
  77 }
  78
  79 int do_slew_movement(object *obj, int check_keys, int check_joy )
  80 {
  81         int moved = 0;
  82         vms_vector svel, movement;                              //scaled velocity (per this frame)
  83         vms_matrix rotmat,new_pm;
  84         int joy_x,joy_y,btns;
  85         int joyx_moved,joyy_moved;
  86         vms_angvec rotang;
  87
  88         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return 0;
  89
  90         if (check_keys) {
  91                 if (Function_mode == FMODE_EDITOR) {
  92                         if (FindArg("-jasen"))
  93                                 obj->mtype.phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD3) - key_down_time(KEY_PAD1));
  94                         else
  95                                 obj->mtype.phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD9) - key_down_time(KEY_PAD7));
  96                         obj->mtype.phys_info.velocity.y += VEL_SPEED * (key_down_time(KEY_PADMINUS) - key_down_time(KEY_PADPLUS));
  97                         obj->mtype.phys_info.velocity.z += VEL_SPEED * (key_down_time(KEY_PAD8) - key_down_time(KEY_PAD2));
  98
  99                         rotang.p = (key_down_time(KEY_LBRACKET) - key_down_time(KEY_RBRACKET))/ROT_SPEED ;
 100                         if (FindArg("-jasen"))
 101                                 rotang.b  = (key_down_time(KEY_PAD7) - key_down_time(KEY_PAD9))/ROT_SPEED;
 102                         else
 103                                 rotang.b  = (key_down_time(KEY_PAD1) - key_down_time(KEY_PAD3))/ROT_SPEED;
 104                         rotang.h  = (key_down_time(KEY_PAD6) - key_down_time(KEY_PAD4))/ROT_SPEED;
 105                 }
 106                 else {
 107                         obj->mtype.phys_info.velocity.x += VEL_SPEED * Controls.sideways_thrust_time;
 108                         obj->mtype.phys_info.velocity.y += VEL_SPEED * Controls.vertical_thrust_time;
 109                         obj->mtype.phys_info.velocity.z += VEL_SPEED * Controls.forward_thrust_time;
 110
 111                         rotang.p = Controls.pitch_time/ROT_SPEED ;
 112                         rotang.b  = Controls.bank_time/ROT_SPEED;
 113                         rotang.h  = Controls.heading_time/ROT_SPEED;
 114                 }
 115         }
 116         else
 117                 rotang.p = rotang.b  = rotang.h  = 0;
 118
 119         //check for joystick movement
 120
 121         if (check_joy && joy_present && (Function_mode == FMODE_EDITOR) )       {
 122                 joy_get_pos(&joy_x,&joy_y);
 123                 btns=joy_get_btns();
 124
 125                 joyx_moved = (abs(joy_x - old_joy_x)>JOY_NULL);
 126                 joyy_moved = (abs(joy_y - old_joy_y)>JOY_NULL);
 127
 128                 if (abs(joy_x) < JOY_NULL) joy_x = 0;
 129                 if (abs(joy_y) < JOY_NULL) joy_y = 0;
 130
 131                 if (btns)
 132                         if (!rotang.p) rotang.p = fixmul(-joy_y * 512,FrameTime); else;
 133                 else
 134                         if (joyy_moved) obj->mtype.phys_info.velocity.z = -joy_y * 8192;
 135
 136                 if (!rotang.h) rotang.h = fixmul(joy_x * 512,FrameTime);
 137
 138                 if (joyx_moved) old_joy_x = joy_x;
 139                 if (joyy_moved) old_joy_y = joy_y;
 140         }
 141
 142         moved = rotang.p | rotang.b | rotang.h;
 143
 144         vm_angles_2_matrix(&rotmat,&rotang);
 145         vm_matrix_x_matrix(&new_pm,&obj->orient,&rotmat);
 146         obj->orient = new_pm;
 147         vm_transpose_matrix(&new_pm);           //make those columns rows
 148
 149         moved |= obj->mtype.phys_info.velocity.x | obj->mtype.phys_info.velocity.y | obj->mtype.phys_info.velocity.z;
 150
 151         svel = obj->mtype.phys_info.velocity;
 152         vm_vec_scale(&svel,FrameTime);          //movement in this frame
 153         vm_vec_rotate(&movement,&svel,&new_pm);
 154
 155 //      obj->last_pos = obj->pos;
 156         vm_vec_add2(&obj->pos,&movement);
 157
 158         moved |= (movement.x || movement.y || movement.z);
 159
 160         if (moved)
 161                 update_object_seg(obj); //update segment id
 162
 163         return moved;
 164 }
 165
 166 //do slew for this frame
 167 int slew_frame(int check_keys)
 168 {
 169         return do_slew_movement( slew_obj, !check_keys, 1 );
 170
 171 }
 172