// Copyright (C) 1999-2000 Id Software, Inc.
//
// cg_view.c -- setup all the parameters (position, angle, etc)
// for a 3D rendering
#include "cg_local.h"
#include "cg_screenfx.h"

#define MAX_SHAKE_INTENSITY			16.0f

#define FRAMES_DOOR		16

/*
=============================================================================

  MODEL TESTING

The viewthing and gun positioning tools from Q2 have been integrated and
enhanced into a single model testing facility.

Model viewing can begin with either "testmodel <modelname>" or "testgun <modelname>".

The names must be the full pathname after the basedir, like 
"models/weapons/v_launch/tris.md3" or "players/male/tris.md3"

Testmodel will create a fake entity 100 units in front of the current view
position, directly facing the viewer.  It will remain immobile, so you can
move around it to view it from different angles.

Testgun will cause the model to follow the player around and supress the real
view weapon model.  The default frame 0 of most guns is completely off screen,
so you will probably have to cycle a couple frames to see it.

"nextframe", "prevframe", "nextskin", and "prevskin" commands will change the
frame or skin of the testmodel.  These are bound to F5, F6, F7, and F8 in
q3default.cfg.

If a gun is being tested, the "gun_x", "gun_y", and "gun_z" variables will let
you adjust the positioning.

Note that none of the model testing features update while the game is paused, so
it may be convenient to test with deathmatch set to 1 so that bringing down the
console doesn't pause the game.

=============================================================================
*/

/*
=================
CG_TestModel_f

Creates an entity in front of the current position, which
can then be moved around
=================
*/
void CG_TestModel_f (void) {
	vec3_t		angles;

	memset( &cg.testModelEntity, 0, sizeof(cg.testModelEntity) );
	if ( trap_Argc() < 2 ) {
		return;
	}

	Q_strncpyz (cg.testModelName, CG_Argv( 1 ), MAX_QPATH );
	cg.testModelEntity.hModel = trap_R_RegisterModel( cg.testModelName );

	if ( trap_Argc() == 3 ) {
		cg.testModelEntity.backlerp = atof( CG_Argv( 2 ) );
		cg.testModelEntity.frame = 1;
		cg.testModelEntity.oldframe = 0;
	}
	if (! cg.testModelEntity.hModel ) {
		CG_Printf( "Can't register model\n" );
		return;
	}

	VectorMA( cg.refdef.vieworg, 100, cg.refdef.viewaxis[0], cg.testModelEntity.origin );

	angles[PITCH] = 0;
	angles[YAW] = 180 + cg.refdefViewAngles[1];
	angles[ROLL] = 0;

	AnglesToAxis( angles, cg.testModelEntity.axis );
	cg.testGun = qfalse;
}

/*
=================
CG_TestGun_f

Replaces the current view weapon with the given model
=================
*/
void CG_TestGun_f (void) {
	CG_TestModel_f();
	cg.testGun = qtrue;
	cg.testModelEntity.renderfx = RF_DEPTHHACK | RF_FIRST_PERSON;
}


void CG_TestModelNextFrame_f (void) {
	cg.testModelEntity.frame++;
	CG_Printf( "frame %i\n", cg.testModelEntity.frame );
}

void CG_TestModelPrevFrame_f (void) {
	cg.testModelEntity.frame--;
	if ( cg.testModelEntity.frame < 0 ) {
		cg.testModelEntity.frame = 0;
	}
	CG_Printf( "frame %i\n", cg.testModelEntity.frame );
}

void CG_TestModelNextSkin_f (void) {
	cg.testModelEntity.skinNum++;
	CG_Printf( "skin %i\n", cg.testModelEntity.skinNum );
}

void CG_TestModelPrevSkin_f (void) {
	cg.testModelEntity.skinNum--;
	if ( cg.testModelEntity.skinNum < 0 ) {
		cg.testModelEntity.skinNum = 0;
	}
	CG_Printf( "skin %i\n", cg.testModelEntity.skinNum );
}

static void CG_AddTestModel (void) {
	int		i;

	// re-register the model, because the level may have changed
	cg.testModelEntity.hModel = trap_R_RegisterModel( cg.testModelName );
	if (! cg.testModelEntity.hModel ) {
		CG_Printf ("Can't register model\n");
		return;
	}

	// if testing a gun, set the origin reletive to the view origin
	if ( cg.testGun ) {
		VectorCopy( cg.refdef.vieworg, cg.testModelEntity.origin );
		VectorCopy( cg.refdef.viewaxis[0], cg.testModelEntity.axis[0] );
		VectorCopy( cg.refdef.viewaxis[1], cg.testModelEntity.axis[1] );
		VectorCopy( cg.refdef.viewaxis[2], cg.testModelEntity.axis[2] );

		// allow the position to be adjusted
		for (i=0 ; i<3 ; i++) {
			cg.testModelEntity.origin[i] += cg.refdef.viewaxis[0][i] * cg_gun_x.value;
			cg.testModelEntity.origin[i] += cg.refdef.viewaxis[1][i] * cg_gun_y.value;
			cg.testModelEntity.origin[i] += cg.refdef.viewaxis[2][i] * cg_gun_z.value;
		}
	}

	trap_R_AddRefEntityToScene( &cg.testModelEntity );
}



//============================================================================


/*
=================
CG_CalcVrect

Sets the coordinates of the rendered window
=================
*/
static void CG_CalcVrect (void) {
	int		size;

	// the intermission should allways be full screen
	if ( cg.snap->ps.pm_type == PM_INTERMISSION ) {
		size = 100;
	} else {
		// bound normal viewsize
		if (cg_viewsize.integer < 30) {
			trap_Cvar_Set ("cg_viewsize","30");
			size = 30;
		} else if (cg_viewsize.integer > 100) {
			trap_Cvar_Set ("cg_viewsize","100");
			size = 100;
		} else {
			size = cg_viewsize.integer;
		}

	}
	cg.refdef.width = cgs.glconfig.vidWidth*size/100;
	cg.refdef.width &= ~1;

	cg.refdef.height = cgs.glconfig.vidHeight*size/100;
	cg.refdef.height &= ~1;

	cg.refdef.x = (cgs.glconfig.vidWidth - cg.refdef.width)/2;
	cg.refdef.y = (cgs.glconfig.vidHeight - cg.refdef.height)/2;
}

//==============================================================================


/*
===============
CG_OffsetThirdPersonView

===============
*/
#define	FOCUS_DISTANCE	512
static void CG_OffsetThirdPersonView( void ) {
	vec3_t		forward, right, up;
	vec3_t		view;
	vec3_t		focusAngles;
	trace_t		trace;
	static vec3_t	mins = { -4, -4, -4 };
	static vec3_t	maxs = { 4, 4, 4 };
	vec3_t		focusPoint;
	float		focusDist;
	float		forwardScale, sideScale;
	char	medicrevive[32];
	int		medicrevive_int;
	vec3_t	camPlayerPos; //TiM

	
	cg.refdef.vieworg[2] += cg.predictedPlayerState.viewheight;

	VectorCopy( cg.refdefViewAngles, focusAngles );
	VectorCopy( cg.refdef.vieworg, camPlayerPos); //Copy the values b4 we offset;

	//RPG-X: TiM - Incorporated offsets so third person can be more dynamic
	//Woo! I figured out how AngleVectors and VectorMA work!! ^_^
	AngleVectors( cg.refdefViewAngles, NULL, right, NULL);
	VectorMA( cg.refdef.vieworg, cg_thirdPersonHorzOffset.value, right, cg.refdef.vieworg );
	//cg.refdef.vieworg[0] += cg_thirdPersonHorzOffset.value;
	cg.refdef.vieworg[2] += cg_thirdPersonVertOffset.value;

	// if dead, look at killer
	//RPG-X: Fix camera movment when play dies with medics revive turned on
	trap_Cvar_VariableStringBuffer( "rpg_medicsrevive", medicrevive, 32 );
	medicrevive_int = atoi(medicrevive);
	
	//TiM: Meh, you don't spin around to look at your killer in real life. O_o
	//Plus, this screws up the model system :(
	/*if(medicrevive_int == 1){
		if ( cg.predictedPlayerState.stats[STAT_HEALTH] <= 1 ) {

			focusAngles[YAW] = cg.predictedPlayerState.stats[STAT_DEAD_YAW];
			cg.refdefViewAngles[YAW] = cg.predictedPlayerState.stats[STAT_DEAD_YAW];
		}
	}else{
		if ( cg.predictedPlayerState.stats[STAT_HEALTH] <= 0 ) {
			focusAngles[YAW] = cg.predictedPlayerState.stats[STAT_DEAD_YAW];
			cg.refdefViewAngles[YAW] = cg.predictedPlayerState.stats[STAT_DEAD_YAW];
		}
	}*/

	if ( focusAngles[PITCH] > 89 )
	{
		focusAngles[PITCH] = 89; // don't go too far overhead
	}
	else if ( focusAngles[PITCH] < -89 )
	{
		focusAngles[PITCH] = -89;
	}

	AngleVectors( focusAngles, forward, NULL, NULL );

	VectorMA( cg.refdef.vieworg, FOCUS_DISTANCE, forward, focusPoint );

	VectorCopy( cg.refdef.vieworg, view );

	view[2] += 16;

	cg.refdefViewAngles[PITCH] *= 0.5;

	AngleVectors( cg.refdefViewAngles, forward, right, up );

	forwardScale = cos( cg_thirdPersonAngle.value / 180 * M_PI );
	sideScale = sin( cg_thirdPersonAngle.value / 180 * M_PI );
	VectorMA( view, -cg_thirdPersonRange.value * forwardScale, forward, view );
	VectorMA( view, -cg_thirdPersonRange.value * sideScale, right, view );

	// trace a ray from the origin to the viewpoint to make sure the view isn't
	// in a solid block.  Use an 8 by 8 block to prevent the view from near clipping anything

	//TiM : Sometimes if the value of these variables is set to extreme numbers, they'll go thru walls. O_o
	//This trace function is to fix that.
	//If player is using these CVARs...
	if ( cg_thirdPersonVertOffset.value != 0 || cg_thirdPersonHorzOffset.value != 0) {
		//Do a trace from playermodel's head to our view location
		CG_Trace( &trace, camPlayerPos, mins, maxs, view, cg.predictedPlayerState.clientNum, MASK_SOLID );

		//Okay, the trace hit something... O_o
		if ( trace.fraction != 1.0 ) {
			//copy where it hit to our view origin. :)
			VectorCopy( trace.endpos, cg.refdef.vieworg );
		}
	}

	CG_Trace( &trace, cg.refdef.vieworg, mins, maxs, view, cg.predictedPlayerState.clientNum, MASK_SOLID );

	if ( trace.fraction != 1.0 ) {
		VectorCopy( trace.endpos, view );
		view[2] += (1.0 - trace.fraction) * 32;
		// try another trace to this position, because a tunnel may have the ceiling
		// close enogh that this is poking out

		CG_Trace( &trace, cg.refdef.vieworg, mins, maxs, view, cg.predictedPlayerState.clientNum, MASK_SOLID );
		VectorCopy( trace.endpos, view );
	}

	VectorCopy( view, cg.refdef.vieworg );

	// select pitch to look at focus point from vieword
	VectorSubtract( focusPoint, cg.refdef.vieworg, focusPoint );
	focusDist = sqrt( focusPoint[0] * focusPoint[0] + focusPoint[1] * focusPoint[1] );
	if ( focusDist < 1 ) {
		focusDist = 1;	// should never happen
	}
	cg.refdefViewAngles[PITCH] = -180 / M_PI * atan2( focusPoint[2], focusDist );
	cg.refdefViewAngles[YAW] -= cg_thirdPersonAngle.value;
}


// this causes a compiler bug on mac MrC compiler
static void CG_StepOffset( void ) {
	int		timeDelta;
	
	// smooth out stair climbing
	timeDelta = cg.time - cg.stepTime;
	if ( timeDelta < STEP_TIME ) {
		cg.refdef.vieworg[2] -= cg.stepChange 
			* (STEP_TIME - timeDelta) / STEP_TIME;
	}
}

/*
===============
CG_OffsetFirstPersonView

===============
*/
static void CG_OffsetFirstPersonView( void ) {
	float			*origin;
	float			*angles;
	float			bob;
	float			ratio;
	float			delta;
	float			speed;
	float			f;
	vec3_t			predictedVelocity;
	int				timeDelta;
	char	medicrevive[32];
	int		medicrevive_int;
	
	if ( cg.snap->ps.pm_type == PM_INTERMISSION ) {
		return;
	}

	origin = cg.refdef.vieworg;
	angles = cg.refdefViewAngles;

	// if dead, fix the angle and don't add any kick
	//RPG-X: Fix camera movment when play dies with medics revive turned on
	trap_Cvar_VariableStringBuffer( "rpg_medicsrevive", medicrevive, 32 );
	medicrevive_int = atoi(medicrevive);
	if(medicrevive_int == 1){
	if ( cg.snap->ps.stats[STAT_HEALTH] <= 1 ) {
		angles[ROLL] = 40;
		angles[PITCH] = -15;
		angles[YAW] = cg.snap->ps.stats[STAT_DEAD_YAW];
		origin[2] += cg.predictedPlayerState.viewheight;
		return;
	}
	}else{
		if ( cg.snap->ps.stats[STAT_HEALTH] <= 0 ) {
		angles[ROLL] = 40;
		angles[PITCH] = -15;
		angles[YAW] = cg.snap->ps.stats[STAT_DEAD_YAW];
		origin[2] += cg.predictedPlayerState.viewheight;
		return;
		}
	}

	// add angles based on weapon kick
	VectorAdd (angles, cg.kick_angles, angles);

	// add angles based on damage kick
	if ( cg.damageTime ) {
		ratio = cg.time - cg.damageTime;
		if ( ratio < DAMAGE_DEFLECT_TIME ) {
			ratio /= DAMAGE_DEFLECT_TIME;
			angles[PITCH] += ratio * cg.v_dmg_pitch;
			angles[ROLL] += ratio * cg.v_dmg_roll;
		} else {
			ratio = 1.0 - ( ratio - DAMAGE_DEFLECT_TIME ) / DAMAGE_RETURN_TIME;
			if ( ratio > 0 ) {
				angles[PITCH] += ratio * cg.v_dmg_pitch;
				angles[ROLL] += ratio * cg.v_dmg_roll;
			}
		}
	}

	// add pitch based on fall kick
#if 0
	ratio = ( cg.time - cg.landTime) / FALL_TIME;
	if (ratio < 0)
		ratio = 0;
	angles[PITCH] += ratio * cg.fall_value;
#endif

	// add angles based on velocity
	VectorCopy( cg.predictedPlayerState.velocity, predictedVelocity );

	delta = DotProduct ( predictedVelocity, cg.refdef.viewaxis[0]);
	angles[PITCH] += delta * cg_runpitch.value;
	
	delta = DotProduct ( predictedVelocity, cg.refdef.viewaxis[1]);
	angles[ROLL] -= delta * cg_runroll.value;

	// add angles based on bob

	// make sure the bob is visible even at low speeds
	speed = cg.xyspeed > 200 ? cg.xyspeed : 200;

	delta = cg.bobfracsin * cg_bobpitch.value * speed;
	if (cg.predictedPlayerState.pm_flags & PMF_DUCKED)
		delta *= 3;		// crouching
	angles[PITCH] += delta;
	delta = cg.bobfracsin * cg_bobroll.value * speed;
	if (cg.predictedPlayerState.pm_flags & PMF_DUCKED)
		delta *= 3;		// crouching accentuates roll
	if (cg.bobcycle & 1)
		delta = -delta;
	angles[ROLL] += delta;

//===================================

	// add view height
	origin[2] += cg.predictedPlayerState.viewheight;

	// smooth out duck height changes
	timeDelta = cg.time - cg.duckTime;
	if ( timeDelta < DUCK_TIME) {
		cg.refdef.vieworg[2] -= cg.duckChange 
			* (DUCK_TIME - timeDelta) / DUCK_TIME;
	}

	// add bob height
	bob = cg.bobfracsin * cg.xyspeed * cg_bobup.value;
	if (bob > 6) {
		bob = 6;
	}

	origin[2] += bob;


	// add fall height
	delta = cg.time - cg.landTime;
	if ( delta < LAND_DEFLECT_TIME ) {
		f = delta / LAND_DEFLECT_TIME;
		cg.refdef.vieworg[2] += cg.landChange * f;
	} else if ( delta < LAND_DEFLECT_TIME + LAND_RETURN_TIME ) {
		delta -= LAND_DEFLECT_TIME;
		f = 1.0 - ( delta / LAND_RETURN_TIME );
		cg.refdef.vieworg[2] += cg.landChange * f;
	}

	// add step offset
	CG_StepOffset();

	// add kick offset

	VectorAdd (origin, cg.kick_origin, origin);

	// pivot the eye based on a neck length
#if 0
	{
#define	NECK_LENGTH		8
	vec3_t			forward, up;
 
	cg.refdef.vieworg[2] -= NECK_LENGTH;
	AngleVectors( cg.refdefViewAngles, forward, NULL, up );
	VectorMA( cg.refdef.vieworg, 3, forward, cg.refdef.vieworg );
	VectorMA( cg.refdef.vieworg, NECK_LENGTH, up, cg.refdef.vieworg );
	}
#endif
}


/*
-------------------------
CGCam_Shake
-------------------------
*/

void CG_CameraShake( float intensity, int duration )
{
	if ( intensity > MAX_SHAKE_INTENSITY )
		intensity = MAX_SHAKE_INTENSITY;

	cg.shake_intensity = intensity;
	cg.shake_duration = duration;
	cg.shake_start = cg.time;
}




/*
-------------------------
CG_UpdateShake

This doesn't actually affect the camera's info, but passed information instead
-------------------------
*/

void CG_UpdateCameraShake( vec3_t origin, vec3_t angles )
{
	vec3_t	moveDir;
	float	intensity_scale, intensity;
	int		i;

	if ( cg.shake_duration <= 0 )
		return;

	if ( cg.time > ( cg.shake_start + cg.shake_duration ) )
	{
		cg.shake_intensity = 0;
		cg.shake_duration = 0;
		cg.shake_start = 0;
		return;
	}

	//intensity_scale now also takes into account FOV with 90.0 as normal
	intensity_scale = 1.0f - ( (float) ( cg.time - cg.shake_start ) / (float) cg.shake_duration ) * (cg.refdef.fov_x/90.0f);

	intensity = cg.shake_intensity * intensity_scale;

	for (i=0; i < 3; i++ )
		moveDir[i] = ( crandom() * intensity );

	//FIXME: Lerp

	//Move the camera
	VectorAdd( origin, moveDir, origin );

	for ( i=0; i < 3; i++ )
		moveDir[i] = ( crandom() * intensity );

	//FIXME: Lerp

	//Move the angles
	VectorAdd( angles, moveDir, angles );
}


//======================================================================

void CG_ZoomDown_f( void )
{ 
	if ( cg.snap->ps.persistant[PERS_CLASS] == PC_NOCLASS 
		||	cg.snap->ps.persistant[PERS_CLASS] != PC_SECURITY 
		&& cg.snap->ps.persistant[PERS_CLASS] != PC_ALPHAOMEGA22 
		&&  cg.snap->ps.persistant[PERS_CLASS] != PC_ADMIN )
	{//in a class-based game, only these can zoom
		cg.zoomed = qfalse;
		cg.zoomLocked = qfalse;
		return;
	}

	// The zoom hasn't been started yet, so do it now
	if ( !cg.zoomed )
	{
		cg.zoomLocked = qfalse;
		cg.zoomed = qtrue;
		cg_zoomFov.value = cg_fov.value;
		cg.zoomTime = cg.time;
		trap_S_StartSound( cg.refdef.vieworg, ENTITYNUM_WORLD, CHAN_AUTO, cgs.media.zoomStart );
		return;
	}

	// Can only snap out of the zoom mode if it has already been locked (CG_ZoomUp_f has been called)
	if ( cg.zoomLocked )
	{
		// Snap out of zoom mode
		cg.zoomed = qfalse;
		cg.zoomTime = cg.time;
		trap_S_StartSound( cg.refdef.vieworg, ENTITYNUM_WORLD, CHAN_AUTO, cgs.media.zoomEnd );
	}
}
 
void CG_ZoomUp_f( void )
{ 

	if ( cg.zoomed ) {
		// Freeze the zoom mode
		cg.zoomLocked = qtrue;
	}
}

/*
====================
CG_CalcFov

Fixed fov at intermissions, otherwise account for fov variable and zooms.
====================
*/
#define	WAVE_AMPLITUDE	1
#define	WAVE_FREQUENCY	0.4

#define FOV_MAX			120

static int CG_CalcFov( void ) {
	float	x;
	float	phase;
	float	v;
	int		contents;
	float	fov_x, fov_y;
	float	zoomFov;
	float	f;
	int		inwater;

	if ( cg.predictedPlayerState.pm_type == PM_INTERMISSION ) {
		// if in intermission, use a fixed value
		fov_x = 90;
	} else {
		// user selectable
		if ( cgs.dmflags & DF_FIXED_FOV ) {
			// dmflag to prevent wide fov for all clients
			fov_x = 80;
		} else {
			fov_x = cg_fov.value;
			if ( fov_x < 1 ) {
				fov_x = 1;
			} else if ( fov_x > FOV_MAX ) {
				fov_x = FOV_MAX;
			}
		}

		// account for zooms
		zoomFov = cg_zoomFov.value;
		if ( zoomFov < 1 ) {
			zoomFov = 1;
		} else if ( zoomFov > FOV_MAX) {
			zoomFov = FOV_MAX;
		}

		// Disable zooming when in third person
		if ( cg.zoomed && !cg.renderingThirdPerson )
		{
			if ( !cg.zoomLocked )
			{
				// Interpolate current zoom level
				cg_zoomFov.value = cg_fov.value - ((float)( cg.time - cg.zoomTime ) / ZOOM_IN_TIME + ZOOM_START_PERCENT) 
									* ( cg_fov.value - MAX_ZOOM_FOV );

				// Clamp zoomFov
				if ( cg_zoomFov.value < MAX_ZOOM_FOV )
				{
					cg_zoomFov.value = MAX_ZOOM_FOV;
				}
				else if ( cg_zoomFov.value > cg_fov.value )
				{
					cg_zoomFov.value = cg_fov.value;
				}
				else
				{//still zooming
					static zoomSoundTime = 0;

					if ( zoomSoundTime < cg.time )
					{
						trap_S_StartSound( cg.refdef.vieworg, ENTITYNUM_WORLD, CHAN_LOCAL, cgs.media.zoomLoop );
						zoomSoundTime = cg.time + 300;
					}
				}
			}

			fov_x = cg_zoomFov.value;
		} else {
			f = ( cg.time - cg.zoomTime ) / (float)ZOOM_OUT_TIME;
			if ( f > 1.0 ) {
				fov_x = fov_x;
			} else {
				fov_x = zoomFov + f * ( fov_x - zoomFov );
			}
		}
	}

	if (cg.predictedPlayerState.introTime > cg.time)
	{	// The stuff is "holodecking in".
		fov_x = 80;
	}


	x = cg.refdef.width / tan( fov_x / 360 * M_PI );
	fov_y = atan2( cg.refdef.height, x );
	fov_y = fov_y * 360 / M_PI;

	// warp if underwater
	contents = CG_PointContents( cg.refdef.vieworg, -1 );
	if ( contents & ( CONTENTS_WATER | CONTENTS_SLIME | CONTENTS_LAVA ) ){
		phase = cg.time / 1000.0 * WAVE_FREQUENCY * M_PI * 2;
		v = WAVE_AMPLITUDE * sin( phase );
		fov_x += v;
		fov_y -= v;
		inwater = qtrue;
	}
	else {
		inwater = qfalse;
	}


	// set it
	cg.refdef.fov_x = fov_x;
	cg.refdef.fov_y = fov_y;

	if ( !cg.zoomed ) {
		cg.zoomSensitivity = 1;
	} else {
		cg.zoomSensitivity = cg.refdef.fov_y / 75.0;
	}

	return inwater;
}




/*
===============
CG_CalcViewValues

Sets cg.refdef view values
===============
*/
static int CG_CalcViewValues( void ) {
	playerState_t	*ps;

	memset( &cg.refdef, 0, sizeof( cg.refdef ) );

	// strings for in game rendering
	// Q_strncpyz( cg.refdef.text[0], "Park Ranger", sizeof(cg.refdef.text[0]) );
	// Q_strncpyz( cg.refdef.text[1], "19", sizeof(cg.refdef.text[1]) );

	// calculate size of 3D view
	CG_CalcVrect();

	ps = &cg.predictedPlayerState;

	// intermission view
	if ( ps->pm_type == PM_INTERMISSION ) {
		VectorCopy( ps->origin, cg.refdef.vieworg );
		VectorCopy( ps->viewangles, cg.refdefViewAngles );
		AnglesToAxis( cg.refdefViewAngles, cg.refdef.viewaxis );
		return CG_CalcFov();
	}

	cg.bobcycle = ( ps->bobCycle & 128 ) >> 7;
	cg.bobfracsin = fabs( sin( ( ps->bobCycle & 127 ) / 127.0 * M_PI ) );
	cg.xyspeed = sqrt( ps->velocity[0] * ps->velocity[0] +
		ps->velocity[1] * ps->velocity[1] );


	VectorCopy( ps->origin, cg.refdef.vieworg );
	VectorCopy( ps->viewangles, cg.refdefViewAngles );

	// add error decay
	if ( cg_errorDecay.value > 0 ) {
		int		t;
		float	f;

		t = cg.time - cg.predictedErrorTime;
		f = ( cg_errorDecay.value - t ) / cg_errorDecay.value;
		if ( f > 0 && f < 1 ) {
			VectorMA( cg.refdef.vieworg, f, cg.predictedError, cg.refdef.vieworg );
		} else {
			cg.predictedErrorTime = 0;
		}
	}

	if ( cg.renderingThirdPerson ) {
		// back away from character
		CG_OffsetThirdPersonView();
	} else {
		// offset for local bobbing and kicks
		CG_OffsetFirstPersonView();
	}

	// shake the camera if necessary
	CG_UpdateCameraShake( cg.refdef.vieworg, cg.refdefViewAngles );
	// position eye reletive to origin
	AnglesToAxis( cg.refdefViewAngles, cg.refdef.viewaxis );

	if ( cg.hyperspace ) {
		cg.refdef.rdflags |= RDF_NOWORLDMODEL | RDF_HYPERSPACE;
	}

	// field of view
	return CG_CalcFov();
}


/*
=====================
CG_PowerupTimerSounds
=====================
*/
static void CG_PowerupTimerSounds( void ) {
	int		i;
	int		t;

	// powerup timers going away
	for ( i = 0 ; i < MAX_POWERUPS ; i++ ) {
		t = cg.snap->ps.powerups[i];

		// kef -- hack hack hack. additionally, hack.
		if ( (PW_OUCH == i) || (PW_GHOST == i))
		{
			continue;
		}
		if ( t <= cg.time ) {
			continue;
		}
		if ( t - cg.time >= POWERUP_BLINKS * POWERUP_BLINK_TIME ) {
			continue;
		}
		if ( ( t - cg.time ) / POWERUP_BLINK_TIME != ( t - cg.oldTime ) / POWERUP_BLINK_TIME ) {
			trap_S_StartSound( NULL, cg.snap->ps.clientNum, CHAN_ITEM, cgs.media.wearOffSound );
		}
	}
}



//=========================================================================

/*
=============
CG_IntroModel

This is when the player is starting the level.
=============
*/
void CG_AddIntroModel(playerState_t *ps, int time) 
{
	static int soundpoint=0, lasttime=999999;
	refEntity_t	doorbox;
	float	alpha;
	byte a;
	//char pClass[MAX_QPATH];
	//char pRank[MAX_QPATH];

	if (lasttime > time)
	{	// Restart everything.
		soundpoint=0;
	}

	lasttime=time;

	// add the model
	memset( &doorbox, 0, sizeof( doorbox ) );
	VectorCopy( cg.refdef.vieworg, doorbox.lightingOrigin );

	doorbox.shaderRGBA[0] = 255;
	doorbox.shaderRGBA[1] = 255;
	doorbox.shaderRGBA[2] = 255;
	doorbox.shaderRGBA[3] = 255;

	doorbox.hModel = cgs.media.doorbox;
	if (!doorbox.hModel) {
		return;
	}


	VectorMA(cg.refdef.vieworg, 25, cg.refdef.viewaxis[0], doorbox.origin);
	VectorMA(doorbox.origin, -35, cg.refdef.viewaxis[2], doorbox.origin);
	AnglesToAxis(cg.refdefViewAngles, doorbox.axis);

	VectorScale(doorbox.axis[0], -1.0, doorbox.axis[0]);
	VectorScale(doorbox.axis[1], -1.0, doorbox.axis[1]);

	if (soundpoint <= 0)
	{	// First part...  "Prepare to compete."
		if (time >= TIME_INIT)
		{
			soundpoint = 1;
			trap_S_StartSound( cg.refdef.vieworg, ENTITYNUM_WORLD, CHAN_AUTO, cgs.media.holoInitSound );
		}
		doorbox.frame = 0;
	}
	else if (soundpoint == 1)
	{	// Second part...  Open door after "prepare".
		if (time >= TIME_DOOR_START)
		{
			soundpoint = 2;
			trap_S_StartSound( cg.refdef.vieworg, ENTITYNUM_WORLD, CHAN_AUTO, cgs.media.holoDoorSound );
		}
		doorbox.frame = 0;
	}
	else if (soundpoint == 2)
	{	// Third part...  Fade in after opening door.
		if (time >= TIME_FADE_START)
		{
			soundpoint = 3;
			trap_S_StartSound( cg.refdef.vieworg, ENTITYNUM_WORLD, CHAN_AUTO, cgs.media.holoFadeSound );
			doorbox.frame = FRAMES_DOOR-1;
		}
		else
		{
			doorbox.frame = ((float)(time - TIME_DOOR_START) / 100.0) + 1;
			if (doorbox.frame >= FRAMES_DOOR)
			{
				doorbox.frame=FRAMES_DOOR-1;
			}
			else
			{
				doorbox.oldframe = doorbox.frame-1;
				doorbox.backlerp = (float)(doorbox.frame) - ((float)(time - TIME_DOOR_START) / 100.0);
			}
		}
	}
	else
	{	// Final part...  Fade out the model.

		alpha = 1.0 - ((float)(time - TIME_FADE_START) / (float)TIME_FADE_DUR);

		if (alpha<0.0)
		{
			alpha=0.0;
		}

		a=255.0*alpha;
		if (a<=0)
		{	// An alpha of zero defaults to opaque...  Makes sense, why even send something that is 100% transparent?
			a=1;

/*			trap_Cvar_VariableStringBuffer( "ui_playerclass", pClass, sizeof(pClass) );
			trap_Cvar_VariableStringBuffer( "ui_playerrank", pRank, sizeof(pRank) );
		
			if ( !strcmp( pClass, "maker" ) || !strcmp( pClass, "alphaomega22" ) ) {
				trap_SendClientCommand( "class command" );
				trap_SendClientCommand( va( "rank %s", pRank)  );
			}

			trap_SendClientCommand( va( "class %s", pClass)  );
			trap_SendClientCommand( va( "rank %s", pRank)  );*/
		}

		doorbox.shaderRGBA[0] = 255;
		doorbox.shaderRGBA[1] = 255;
		doorbox.shaderRGBA[2] = 255;
		doorbox.shaderRGBA[3] = a;
		doorbox.frame = FRAMES_DOOR-1;
	}

	doorbox.renderfx |= (RF_DEPTHHACK|RF_FORCE_ENT_ALPHA|RF_FULLBRIGHT);

	trap_R_AddRefEntityToScene(&doorbox);
}


//=========================================================================

/*
=================
CG_DrawActiveFrame

Generates and draws a game scene and status information at the given time.
=================
*/
void CG_DrawActiveFrame( int serverTime, stereoFrame_t stereoView, qboolean demoPlayback ) {
	int		inwater;

	cg.time = serverTime;
	cg.demoPlayback = demoPlayback;

	// update cvars
	CG_UpdateCvars();

	// if we are only updating the screen as a loading
	// pacifier, don't even try to read snapshots
	if ( cg.infoScreenText[0] != 0 ) {
		CG_DrawInformation();
		return;
	}

	// any looped sounds will be respecified as entities
	// are added to the render list
	trap_S_ClearLoopingSounds();

	// clear all the render lists
	trap_R_ClearScene();

	// set up cg.snap and possibly cg.nextSnap
	CG_ProcessSnapshots();

	// if we haven't received any snapshots yet, all
	// we can draw is the information screen
	if ( !cg.snap || ( cg.snap->snapFlags & SNAPFLAG_NOT_ACTIVE ) ) {
		CG_DrawInformation();
		return;
	}

	// let the client system know what our weapon and zoom settings are
	trap_SetUserCmdValue( cg.weaponSelect, cg.zoomSensitivity );

	// this counter will be bumped for every valid scene we generate
	cg.clientFrame++;

	// update cg.predictedPlayerState
	CG_PredictPlayerState();

	// decide on third person view
	cg.renderingThirdPerson = cg_thirdPerson.integer || (cg.snap->ps.stats[STAT_HEALTH] <= 0);

	// build cg.refdef
	inwater = CG_CalcViewValues();

	// first person blend blobs, done after AnglesToAxis
	if ( !cg.renderingThirdPerson ) 
	{
		CG_DrawFullScreenFX();
	}


	// build the render lists
	if ( !cg.hyperspace ) {
		CG_AddPacketEntities();			// adter calcViewValues, so predicted player state is correct
		CG_AddMarks();
		CG_AddLocalEntities();
	}

	if (cg.predictedPlayerState.introTime > cg.time)
	{	// Render the holodeck doors
		CG_AddIntroModel(&cg.predictedPlayerState, TIME_INTRO - (cg.predictedPlayerState.introTime - cg.time));
	}

	CG_AddViewWeapon( &cg.predictedPlayerState );

	// finish up the rest of the refdef
	if ( cg.testModelEntity.hModel ) {
		CG_AddTestModel();
	}
	cg.refdef.time = cg.time;
	memcpy( cg.refdef.areamask, cg.snap->areamask, sizeof( cg.refdef.areamask ) );

	// update audio positions
	trap_S_Respatialize( cg.snap->ps.clientNum, cg.refdef.vieworg, cg.refdef.viewaxis, inwater );

	// warning sounds when powerup is wearing off
	CG_PowerupTimerSounds();

	// make sure the lagometerSample and frame timing isn't done twice when in stereo
	if ( stereoView != STEREO_RIGHT ) {
		cg.frametime = cg.time - cg.oldTime;
		if ( cg.frametime < 0 ) {
			cg.frametime = 0;
		}
		cg.oldTime = cg.time;
		CG_AddLagometerFrameInfo();
	}

	// actually issue the rendering calls
	CG_DrawActive( stereoView );

	if ( cg_stats.integer ) {
		CG_Printf( "cg.clientFrame:%i\n", cg.clientFrame );
	}
}