diff options
Diffstat (limited to 'apps/plugins/sdl/progs/quake/chase.c')
-rw-r--r-- | apps/plugins/sdl/progs/quake/chase.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/apps/plugins/sdl/progs/quake/chase.c b/apps/plugins/sdl/progs/quake/chase.c new file mode 100644 index 0000000000..23061e341a --- /dev/null +++ b/apps/plugins/sdl/progs/quake/chase.c | |||
@@ -0,0 +1,92 @@ | |||
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 = {"chase_back", "100"}; | ||
25 | cvar_t chase_up = {"chase_up", "16"}; | ||
26 | cvar_t chase_right = {"chase_right", "0"}; | ||
27 | cvar_t chase_active = {"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 | |||