/*
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

#include "quakedef.h"
#include "cl_collision.h"

cvar_t chase_back = {CVAR_SAVE, "chase_back", "48"};
cvar_t chase_up = {CVAR_SAVE, "chase_up", "24"};
cvar_t chase_active = {CVAR_SAVE, "chase_active", "0"};
// GAME_GOODVSBAD2
cvar_t chase_stevie = {0, "chase_stevie", "0"};

void Chase_Init (void)
{
	Cvar_RegisterVariable (&chase_back);
	Cvar_RegisterVariable (&chase_up);
	Cvar_RegisterVariable (&chase_active);
	if (gamemode == GAME_GOODVSBAD2)
		Cvar_RegisterVariable (&chase_stevie);
}

void Chase_Reset (void)
{
	// for respawning and teleporting
//	start position 12 units behind head
}

void Chase_Update (void)
{
	vec_t camback, camup, dist, forward[3], stop[3], chase_dest[3], normal[3], projectangles[3];

	camback = bound(0, chase_back.value, 128);
	if (chase_back.value != camback)
		Cvar_SetValueQuick(&chase_back, camback);
	camup = bound(-48, chase_up.value, 96);
	if (chase_up.value != camup)
		Cvar_SetValueQuick(&chase_up, camup);

	VectorCopy(cl.viewangles, projectangles);
	if (gamemode == GAME_GOODVSBAD2 && chase_stevie.integer)
	{
		projectangles[0] = 90;
		r_refdef.viewangles[0] = 90;
		camback = 1024;
	}
	AngleVectors (projectangles, forward, NULL, NULL);

	dist = -chase_back.value - 8;
	chase_dest[0] = r_refdef.vieworg[0] + forward[0] * dist;
	chase_dest[1] = r_refdef.vieworg[1] + forward[1] * dist;
	chase_dest[2] = r_refdef.vieworg[2] + forward[2] * dist + chase_up.value;

	CL_TraceLine(r_refdef.vieworg, chase_dest, stop, normal, true, NULL, SUPERCONTENTS_SOLID | SUPERCONTENTS_SKY);
	chase_dest[0] = stop[0] + forward[0] * 8 + normal[0] * 4;
	chase_dest[1] = stop[1] + forward[1] * 8 + normal[1] * 4;
	chase_dest[2] = stop[2] + forward[2] * 8 + normal[2] * 4;

	VectorCopy (chase_dest, r_refdef.vieworg);
}