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 /*
  15  *
  16  * Basic slew system for moving around the mine
  17  *
  18  */
  19
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <conf.h>
  23 #endif
  24
  25 #include <stdlib.h>
  26
  27 #include "inferno.h"
  28 #include "maths.h"
  29 #include "key.h"
  30 #include "joy.h"
  31 #include "dxxerror.h"
  32 #include "args.h"
  33
  34
  35 //variables for slew system
  36
  37 object *slew_obj=NULL;  //what object is slewing, or NULL if none
  38
  39 #define JOY_NULL 15
  40 #define ROT_SPEED 8             //rate of rotation while key held down
  41 #define VEL_SPEED (2*55)        //rate of acceleration while key held down
  42
  43 short old_joy_x,old_joy_y;      //position last time around
  44
  45 //      Function Prototypes
  46 int slew_stop(void);
  47
  48
  49 // -------------------------------------------------------------------
  50 //say start slewing with this object
  51 void slew_init(object *obj)
  52 {
  53         slew_obj = obj;
  54
  55         slew_obj->control_type = CT_SLEW;
  56         slew_obj->movement_type = MT_NONE;
  57
  58         slew_stop();            //make sure not moving
  59 }
  60
  61
  62 int slew_stop()
  63 {
  64         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return 0;
  65
  66         vm_vec_zero(&slew_obj->mtype.phys_info.velocity);
  67         return 1;
  68 }
  69
  70 void slew_reset_orient()
  71 {
  72         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return;
  73
  74         slew_obj->orient.rvec.x = slew_obj->orient.uvec.y = slew_obj->orient.fvec.z = f1_0;
  75
  76         slew_obj->orient.rvec.y = slew_obj->orient.rvec.z = slew_obj->orient.uvec.x =
  77    slew_obj->orient.uvec.z = slew_obj->orient.fvec.x = slew_obj->orient.fvec.y = 0;
  78
  79 }
  80
  81 int do_slew_movement(object *obj, int check_keys, int check_joy )
  82 {
  83         int moved = 0;
  84         vms_vector svel, movement;                              //scaled velocity (per this frame)
  85         vms_matrix rotmat,new_pm;
  86         int joy_x,joy_y,btns;
  87         int joyx_moved,joyy_moved;
  88         vms_angvec rotang;
  89
  90         if (!slew_obj || slew_obj->control_type!=CT_SLEW) return 0;
  91
  92         if (check_keys) {
  93                 if (Function_mode == FMODE_EDITOR) {
  94                         if (FindArg("-jasen"))
  95                                 obj->mtype.phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD3) - key_down_time(KEY_PAD1));
  96                         else
  97                                 obj->mtype.phys_info.velocity.x += VEL_SPEED * (key_down_time(KEY_PAD9) - key_down_time(KEY_PAD7));
  98                         obj->mtype.phys_info.velocity.y += VEL_SPEED * (key_down_time(KEY_PADMINUS) - key_down_time(KEY_PADPLUS));
  99                         obj->mtype.phys_info.velocity.z += VEL_SPEED * (key_down_time(KEY_PAD8) - key_down_time(KEY_PAD2));
 100
 101                         rotang.p = (key_down_time(KEY_LBRACKET) - key_down_time(KEY_RBRACKET))/ROT_SPEED ;
 102                         if (FindArg("-jasen"))
 103                                 rotang.b  = (key_down_time(KEY_PAD7) - key_down_time(KEY_PAD9))/ROT_SPEED;
 104                         else
 105                                 rotang.b  = (key_down_time(KEY_PAD1) - key_down_time(KEY_PAD3))/ROT_SPEED;
 106                         rotang.h  = (key_down_time(KEY_PAD6) - key_down_time(KEY_PAD4))/ROT_SPEED;
 107                 }
 108                 else {
 109                         obj->mtype.phys_info.velocity.x += VEL_SPEED * Controls.sideways_thrust_time;
 110                         obj->mtype.phys_info.velocity.y += VEL_SPEED * Controls.vertical_thrust_time;
 111                         obj->mtype.phys_info.velocity.z += VEL_SPEED * Controls.forward_thrust_time;
 112
 113                         rotang.p = Controls.pitch_time/ROT_SPEED ;
 114                         rotang.b  = Controls.bank_time/ROT_SPEED;
 115                         rotang.h  = Controls.heading_time/ROT_SPEED;
 116                 }
 117         }
 118         else
 119                 rotang.p = rotang.b  = rotang.h  = 0;
 120
 121         //check for joystick movement
 122
 123         if (check_joy && joy_present && (Function_mode == FMODE_EDITOR) )       {
 124                 joy_get_pos(&joy_x,&joy_y);
 125                 btns=joy_get_btns();
 126
 127                 joyx_moved = (abs(joy_x - old_joy_x)>JOY_NULL);
 128                 joyy_moved = (abs(joy_y - old_joy_y)>JOY_NULL);
 129
 130                 if (abs(joy_x) < JOY_NULL) joy_x = 0;
 131                 if (abs(joy_y) < JOY_NULL) joy_y = 0;
 132
 133                 if (btns)
 134                         if (!rotang.p) rotang.p = fixmul(-joy_y * 512,FrameTime); else;
 135                 else
 136                         if (joyy_moved) obj->mtype.phys_info.velocity.z = -joy_y * 8192;
 137
 138                 if (!rotang.h) rotang.h = fixmul(joy_x * 512,FrameTime);
 139
 140                 if (joyx_moved) old_joy_x = joy_x;
 141                 if (joyy_moved) old_joy_y = joy_y;
 142         }
 143
 144         moved = rotang.p | rotang.b | rotang.h;
 145
 146         vm_angles_2_matrix(&rotmat,&rotang);
 147         vm_matrix_x_matrix(&new_pm,&obj->orient,&rotmat);
 148         obj->orient = new_pm;
 149         vm_transpose_matrix(&new_pm);           //make those columns rows
 150
 151         moved |= obj->mtype.phys_info.velocity.x | obj->mtype.phys_info.velocity.y | obj->mtype.phys_info.velocity.z;
 152
 153         svel = obj->mtype.phys_info.velocity;
 154         vm_vec_scale(&svel,FrameTime);          //movement in this frame
 155         vm_vec_rotate(&movement,&svel,&new_pm);
 156
 157 //      obj->last_pos = obj->pos;
 158         vm_vec_add2(&obj->pos,&movement);
 159
 160         moved |= (movement.x || movement.y || movement.z);
 161
 162         if (moved)
 163                 update_object_seg(obj); //update segment id
 164
 165         return moved;
 166 }
 167
 168 //do slew for this frame
 169 int slew_frame(int check_keys)
 170 {
 171         return do_slew_movement( slew_obj, !check_keys, 1 );
 172
 173 }
 174