1 /* 2 Copyright (C) 1996-1997 Id Software, Inc. 3 4 This program is free software; you can redistribute it and/or 5 modify it under the terms of the GNU General Public License 6 as published by the Free Software Foundation; either version 2 7 of the License, or (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 13 See the GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19 */ 20 // chase.c -- chase camera code 21 22 #include "quakedef.h" 23 24 cvar_t chase_back = CVAR2("chase_back", "100"); 25 cvar_t chase_up = CVAR2("chase_up", "16"); 26 cvar_t chase_right = CVAR2("chase_right", "0"); 27 cvar_t chase_active = CVAR2("chase_active", "0"); 28 29 vec3_t chase_pos; 30 vec3_t chase_angles; 31 32 vec3_t chase_dest; 33 vec3_t chase_dest_angles; 34 35 36 void Chase_Init (void) 37 { 38 Cvar_RegisterVariable (&chase_back); 39 Cvar_RegisterVariable (&chase_up); 40 Cvar_RegisterVariable (&chase_right); 41 Cvar_RegisterVariable (&chase_active); 42 } 43 44 void Chase_Reset (void) 45 { 46 // for respawning and teleporting 47 // start position 12 units behind head 48 } 49 50 void TraceLine (vec3_t start, vec3_t end, vec3_t impact) 51 { 52 trace_t trace; 53 54 memset (&trace, 0, sizeof(trace)); 55 SV_RecursiveHullCheck (cl.worldmodel->hulls, 0, 0, 1, start, end, &trace); 56 57 VectorCopy (trace.endpos, impact); 58 } 59 60 void Chase_Update (void) 61 { 62 int i; 63 float dist; 64 vec3_t forward, up, right; 65 vec3_t dest, stop; 66 67 68 // if can't see player, reset 69 AngleVectors (cl.viewangles, forward, right, up); 70 71 // calc exact destination 72 for (i=0 ; i<3 ; i++) 73 chase_dest[i] = r_refdef.vieworg[i] 74 - forward[i]*chase_back.value 75 - right[i]*chase_right.value; 76 chase_dest[2] = r_refdef.vieworg[2] + chase_up.value; 77 78 // find the spot the player is looking at 79 VectorMA (r_refdef.vieworg, 4096, forward, dest); 80 TraceLine (r_refdef.vieworg, dest, stop); 81 82 // calculate pitch to look at the same spot from camera 83 VectorSubtract (stop, r_refdef.vieworg, stop); 84 dist = DotProduct (stop, forward); 85 if (dist < 1) 86 dist = 1; 87 r_refdef.viewangles[PITCH] = -atan(stop[2] / dist) / M_PI * 180; 88 89 // move towards destination 90 VectorCopy (chase_dest, r_refdef.vieworg); 91 } 92 93
