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chase.c
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chase.c
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/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// chase.c -- chase camera code
// much of the code here was taken from Telejano.
// Some editing by Entar; chase_pitch and _roll only work in
// custom chase mode (chase_active 2) which is created by Entar
// for "cinematic" screenshots; chase_active 1 is your regular chasecam.
#include "quakedef.h"
cvar_t chase_back = {"chase_back", "55"};
cvar_t chase_up = {"chase_up", "20"};
cvar_t chase_right = {"chase_right", "-5"};
cvar_t chase_active = {"chase_active", "0"};
cvar_t chase_pitch = {"chase_pitch", "5", true};
cvar_t chase_roll = {"chase_roll", "0", true};
cvar_t chase_yaw = {"chase_yaw", "0", true};
vec3_t chase_pos;
vec3_t chase_angles;
vec3_t chase_dest;
vec3_t chase_dest_angles;
#define MAXCAMS 100
typedef struct
{
vec3_t org;
vec3_t angle;
float lastchange;
int used;
} infocam;
infocam cams[MAXCAMS];
/*void TraceLine (vec3_t start, vec3_t end, vec3_t impact)
{
trace_t trace;
memset (&trace, 0, sizeof(trace));
SV_RecursiveHullCheck (cl.worldmodel->hulls, 0, 0, 1, start, end, &trace);
VectorCopy (trace.endpos, impact);
}*/
extern entity_t *traceline_entity[MAX_EDICTS];
extern int traceline_entities;
float TraceLine (vec3_t start, vec3_t end, vec3_t impact, vec3_t normal)
{
trace_t trace;
extern cvar_t env_engine;
int x;
model_t *mod;
float shortest;
vec3_t newstart, newend;
memset (&trace, 0, sizeof(trace));
VectorCopy (end, trace.endpos);
trace.fraction = 1;
trace.startsolid = true;
// if (sv.active)
// SV_RecursiveHullCheck (sv.worldmodel->hulls, 0, 0, 1, start, end, &trace);
// else
if (cl.worldmodel)
SV_RecursiveHullCheck (cl.worldmodel->hulls, 0, 0, 1, start, end, &trace);
VectorCopy (trace.endpos, impact);
VectorCopy (trace.plane.normal, normal);
shortest = trace.fraction;
VectorCopy (end, trace.endpos);
trace.fraction = 1;
trace.startsolid = true;
for (x = 0; x < traceline_entities; x++)
{
mod = traceline_entity[x]->model;
if (mod->type != mod_brush) continue;
if (mod->name[0] != '*') continue;
// set up start point
// offset the start [0] and [1] points by entity origin to do func_train bmodels
// this is positioned above the model to account for moving bmodels (note the "-" in [2])
newstart[0] = start[0] + cl_visedicts[x]->origin[0];
newstart[1] = start[1] + cl_visedicts[x]->origin[1];
newstart[2] = start[2] + cl_visedicts[x]->origin[2];
// set up end point
newend[0] = end[0] + cl_visedicts[x]->origin[0];
newend[1] = end[1] + cl_visedicts[x]->origin[1];
newend[2] = end[2] + cl_visedicts[x]->origin[2];
// reset trace
memset (&trace, 0, sizeof(trace));
VectorCopy (end, trace.endpos);
trace.fraction = 1;
trace.startsolid = true;
// r = RecursiveLightPoint (mod->nodes + mod->hulls[0].firstclipnode, start, end);
SV_RecursiveHullCheck (mod->hulls, mod->hulls[0].firstclipnode, 0, 1, newstart, newend, &trace);
// check for shortest path
if (trace.fraction < shortest)
{
shortest = trace.fraction;
VectorCopy (trace.endpos, impact);
VectorSubtract(trace.endpos, cl_visedicts[x]->origin, trace.endpos);
VectorCopy (trace.plane.normal, normal);
}
VectorCopy (end, trace.endpos);
trace.fraction = 1;
trace.startsolid = true;
}
return shortest;
}
int GetNearCam(vec3_t org)
{
int i;
vec3_t vec,stop;
int min_num = 0; // = no near cam
int min_dist = 9999999;
for (i = 0; i < MAXCAMS; i++)
{
if(cams[i].used)
{
VectorSubtract (org, cams[i].org, vec);
if (Length(vec) < min_dist)
{
//TODO: avoid that?
if (TraceLine(org,cams[i].org,stop,stop)==1)
{
min_num = i;
min_dist = Length(vec);
}
}
}
}
return min_num;
}
int GetAliasCam(vec3_t org, vec3_t out)
{
int i;
//TODO: smooth here
i = GetNearCam(org);
if (!i)
{
VectorCopy(org,out);
return 0;
}
//sucesfull alias cam!
VectorCopy(cams[i].org, out);
return i;
}
void Chase_Init (void)
{
Cvar_RegisterVariable (&chase_back);
Cvar_RegisterVariable (&chase_up);
Cvar_RegisterVariable (&chase_right);
Cvar_RegisterVariable (&chase_active);
Cvar_RegisterVariable (&chase_pitch);
Cvar_RegisterVariable (&chase_roll);
Cvar_RegisterVariable (&chase_yaw);
}
void Chase_Reset (void)
{
// for respawning and teleporting
// start position 12 units behind head
}
void vectoangles (vec3_t value1,vec3_t out);;
void Chase_Update (void)
{
//TODO: reformulation
int i, camavail;
float dist;
vec3_t forward, up, right, normal, out, bak;
vec3_t dest, stop;
camavail =0; // this need to be set to zero to all
// if can't see player, reset
if (chase_active.value == 1)
AngleVectors (cl.viewangles, forward, right, up);
//Tei chase zenit
else
if (chase_active.value == 2)
{
VectorClear(dest);
dest[2] = -1;
AngleVectors (dest, forward, right, up);
}
else
{
camavail = 0;
//Backup vieworg
VectorCopy(r_refdef.vieworg, bak);
if (camavail = GetAliasCam(r_refdef.vieworg, out))
{
VectorCopy(out, r_refdef.vieworg);
AngleVectors (cams[camavail].angle, forward, right, up);
}
else
{
//Normal chase
AngleVectors (cl.viewangles, forward, right, up);
}
}
//Tei chase zenit
if (chase_active.value == 4) // absolute values
{
chase_dest[0] = chase_right.value;
chase_dest[1] = chase_back.value;
chase_dest[2] = chase_up.value;
}
else
{
for (i=0 ; i<3 ; i++) // calc exact destination
chase_dest[i] = r_refdef.vieworg[i]
- forward[i]*chase_back.value
- right[i]*chase_right.value;
chase_dest[2] = r_refdef.vieworg[2] + chase_up.value;
}
// find the spot the player is looking at
if (chase_active.value == 1 )
{
VectorMA (r_refdef.vieworg, 4096, forward, dest);
TraceLine (r_refdef.vieworg, dest, stop, normal);
// calculate pitch to look at the same spot from camera
VectorSubtract (stop, r_refdef.vieworg, stop);
dist = DotProduct (stop, forward);
if (dist < 1)
dist = 1;
//r_refdef.viewangles[PITCH] = -atan(stop[2] / dist) / M_PI * 180;
r_refdef.viewangles[PITCH] = -stop[2] / dist / M_PI * 180;
}
//Tei chase zenit
else if (chase_active.value == 2 || chase_active.value == 4)
{
r_refdef.viewangles[PITCH] = chase_pitch.value;
r_refdef.viewangles[ROLL] = chase_roll.value;
r_refdef.viewangles[YAW] = chase_yaw.value;
}
else if (chase_active.value == 3)
{
r_refdef.viewangles[PITCH] += chase_pitch.value;
r_refdef.viewangles[ROLL] += chase_roll.value;
r_refdef.viewangles[YAW] += chase_yaw.value;
}
else
{
if (camavail)
{
VectorSubtract( bak, r_refdef.vieworg ,normal);
vectoangles(normal, r_refdef.viewangles);//out);
r_refdef.viewangles[PITCH] = - r_refdef.viewangles[PITCH];
//VectorCopy(out, r_refdef.viewangles);
}
else
{
VectorMA (r_refdef.vieworg, 4096, forward, dest);
TraceLine (r_refdef.vieworg, dest, stop, normal);
// calculate pitch to look at the same spot from camera
VectorSubtract (stop, r_refdef.vieworg, stop);
dist = DotProduct (stop, forward);
if (dist < 1)
dist = 1;
r_refdef.viewangles[PITCH] = -atan(stop[2] / dist) / M_PI * 180;
}
}
//Tei chase zenit
if ( !camavail)
{
// Tomaz - Chase Cam Fix Begin
TraceLine(r_refdef.vieworg, chase_dest, stop, normal);
if (stop[0] != 0 || stop[1] != 0 || stop[2] != 0)
{
// Entar : move the camera away from the wall it's hitting, so we don't see behind it
VectorAdd(normal, stop, stop);
VectorCopy(stop, chase_dest);
}
// Tomaz - Chase Cam Fix End
TraceLine(r_refdef.vieworg, chase_dest, stop, normal);
if (Length(stop) != 0)
VectorCopy(stop, chase_dest);
// move towards destination
VectorCopy (chase_dest, r_refdef.vieworg);
}
}