st/code/cgame/cg_effects.c

/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2007 HermitWorks Entertainment Corporation

This file is part of the Space Trader source code.

The Space Trader source code 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.

The Space Trader source code 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 the Space Trader source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/

#include "cg_local.h"

// cg_effects.c -- these functions generate localentities, usually as a result
// of event processing

/*
==================
CG_BubbleTrail

Bullets shot underwater
==================
*/
void CG_BubbleTrail( vec3_t start, vec3_t end, float spacing ) {
	vec3_t		move;
	vec3_t		vec;
	float		len;
	int			i;

	if ( cg_noProjectileTrail.integer ) {
		return;
	}

	VectorCopy (start, move);
	VectorSubtract (end, start, vec);
	len = VectorNormalize (vec);

	// advance a random amount first
	i = rand() % (int)spacing;
	VectorMA( move, i, vec, move );

	VectorScale (vec, spacing, vec);

	for ( ; i < len; i += spacing ) {
		localEntity_t	*le;
		refEntity_t		*re;

		le = CG_AllocLocalEntity();
		le->leFlags = LEF_PUFF_DONT_SCALE;
		le->leType = LE_MOVE_SCALE_FADE;
		le->startTime = cg.time;
		le->endTime = cg.time + 1000 + random() * 250;
		le->lifeRate = 1.0 / ( le->endTime - le->startTime );

		re = &le->refEntity;
		re->shaderTime = cg.time / 1000.0f;

		re->reType = RT_SPRITE;
		re->rotation = 0;
		re->radius = 3;
		re->customShader = cgs.media.waterBubbleShader;
		re->shaderRGBA[0] = 0xff;
		re->shaderRGBA[1] = 0xff;
		re->shaderRGBA[2] = 0xff;
		re->shaderRGBA[3] = 0xff;

		le->color[3] = 1.0;

		le->pos.trType = TR_LINEAR;
		le->pos.trTime = cg.time;
		VectorCopy( move, le->pos.trBase );
		le->pos.trDelta[0] = crandom()*5;
		le->pos.trDelta[1] = crandom()*5;
		le->pos.trDelta[2] = crandom()*5 + 6;

		VectorAdd (move, vec, move);
	}
}

/*
=====================
CG_SmokePuff

Adds a smoke puff or blood trail localEntity.
=====================
*/
localEntity_t *CG_SmokePuff( const vec3_t p, const vec3_t vel,  float radius,
	float r, float g, float b, float a, float duration, int startTime, int fadeInTime,
	int leFlags, qhandle_t hShader )
{
	localEntity_t	*le;
	refEntity_t		*re;
//	int fadeInTime = startTime + duration / 2;

	le = CG_AllocLocalEntity();
	le->leFlags = leFlags;
	le->radius = radius;

	re = &le->refEntity;
	re->rotation = Q_random() * 360;
	re->radius = radius;
	re->shaderTime = startTime / 1000.0f;

	le->leType = LE_MOVE_SCALE_FADE;
	le->startTime = startTime;
	le->fadeInTime = fadeInTime;
	le->endTime = startTime + duration;
	if( fadeInTime > startTime )
		le->lifeRate = 1.0 / ( le->endTime - le->fadeInTime );
	else
		le->lifeRate = 1.0 / ( le->endTime - le->startTime );
	le->color[0] = r;
	le->color[1] = g; 
	le->color[2] = b;
	le->color[3] = a;


	le->pos.trType = TR_LINEAR;
	le->pos.trTime = startTime;
	VectorCopy( vel, le->pos.trDelta );
	VectorCopy( p, le->pos.trBase );

	VectorCopy( p, re->origin );
	re->customShader = hShader;

	re->shaderRGBA[0] = le->color[0] * 0xff;
	re->shaderRGBA[1] = le->color[1] * 0xff;
	re->shaderRGBA[2] = le->color[2] * 0xff;
	re->shaderRGBA[3] = 0xff;

	re->reType = RT_SPRITE;
	re->radius = le->radius;

	return le;
}

/*
==================
CG_SpawnEffect

Player teleporting in or out
==================
*/
void CG_SpawnEffect( vec3_t org ) {
	localEntity_t	*le;
	refEntity_t		*re;

	le = CG_AllocLocalEntity();
	le->leFlags = 0;
	le->leType = LE_FADE_RGB;
	le->startTime = cg.time;
	le->endTime = cg.time + 500;
	le->lifeRate = 1.0 / ( le->endTime - le->startTime );

	le->color[0] = le->color[1] = le->color[2] = le->color[3] = 1.0;

	re = &le->refEntity;

	re->reType = RT_MODEL;
	re->shaderTime = cg.time / 1000.0f;

	re->customShader = cgs.media.teleportEffectShader;
	re->hModel = cgs.media.teleportEffectModel;
	AxisClear( re->axis );

	VectorCopy( org, re->origin );
}



/*
==================
CG_ScorePlum
==================
*/
void CG_ScorePlum( int client, vec3_t org, int score ) {
	localEntity_t	*le;
	refEntity_t		*re;
	vec3_t			angles;
	static vec3_t lastPos;

	// only visualize for the client that scored
	if (client != cg.predictedPlayerState.clientNum || cg_scorePlum.integer == 0) {
		return;
	}

	le = CG_AllocLocalEntity();
	le->leFlags = 0;
	le->leType = LE_SCOREPLUM;
	le->startTime = cg.time;
	le->endTime = cg.time + 4000;
	le->lifeRate = 1.0 / ( le->endTime - le->startTime );

	
	le->color[0] = le->color[1] = le->color[2] = le->color[3] = 1.0;
	le->radius = score;
	
	VectorCopy( org, le->pos.trBase );
	if (org[2] >= lastPos[2] - 20 && org[2] <= lastPos[2] + 20) {
		le->pos.trBase[2] -= 20;
	}

	//CG_Printf( "Plum origin %i %i %i -- %i\n", (int)org[0], (int)org[1], (int)org[2], (int)Distance(org, lastPos));
	VectorCopy(org, lastPos);


	re = &le->refEntity;

	re->reType = RT_SPRITE;
	re->radius = 16;

	VectorClear(angles);
	AnglesToAxis( angles, re->axis );
}


/*
====================
CG_MakeExplosion
====================
*/
localEntity_t *CG_MakeExplosion( vec3_t origin, vec3_t dir, 
								qhandle_t hModel, qhandle_t shader,
								int msec, qboolean isSprite ) {
	float			ang;
	localEntity_t	*ex;
	int				offset;
	vec3_t			tmpVec, newOrigin;

	if ( msec <= 0 ) {
		CG_Error( "CG_MakeExplosion: msec = %i", msec );
	}

	// skew the time a bit so they aren't all in sync
	offset = Q_rand() & 63;

	ex = CG_AllocLocalEntity();
	if ( isSprite ) {
		ex->leType = LE_SPRITE_EXPLOSION;

		// randomly rotate sprite orientation
		ex->refEntity.rotation = Q_rand() % 360;
		VectorScale( dir, 16, tmpVec );
		VectorAdd( tmpVec, origin, newOrigin );
	} else {
		ex->leType = LE_EXPLOSION;
		VectorCopy( origin, newOrigin );

		// set axis with random rotate
		if ( !dir ) {
			AxisClear( ex->refEntity.axis );
		} else {
			ang = Q_rand() % 360;
			VectorCopy( dir, ex->refEntity.axis[0] );
			RotateAroundDirection( ex->refEntity.axis, ang );
		}
	}

	ex->startTime = cg.time - offset;
	ex->endTime = ex->startTime + msec;

	// bias the time so all shader effects start correctly
	ex->refEntity.shaderTime = ex->startTime / 1000.0f;

	ex->refEntity.hModel = hModel;
	ex->refEntity.customShader = shader;

	// set origin
	VectorCopy( newOrigin, ex->refEntity.origin );
	VectorCopy( newOrigin, ex->refEntity.oldorigin );

	ex->color[0] = ex->color[1] = ex->color[2] = 1.0;

	return ex;
}


/*
=================
CG_Bleed

This is the spurt of blood when a character gets hit
=================
*/
void CG_Bleed( vec3_t origin, int entityNum ) {
	localEntity_t	*ex;

	if ( !cg_blood.integer ) {
		return;
	}

	ex = CG_AllocLocalEntity();
	ex->leType = LE_EXPLOSION;

	ex->startTime = cg.time;
	ex->endTime = ex->startTime + 500;
	
	VectorCopy ( origin, ex->refEntity.origin);
	ex->refEntity.reType = RT_SPRITE;
	ex->refEntity.rotation = Q_rand() % 360;
	ex->refEntity.radius = 24;

	ex->refEntity.shaderTime = cg.time;

	if( cg_entities[entityNum].currentState.shields > 0 )
	{
		ex->refEntity.customShader = cgs.media.shieldExplosionShader;
		ex->endTime = ex->startTime + 250;
	}
	else
	{
		ex->refEntity.customShader = cgs.media.bloodExplosionShader;
	}
	*(unsigned int *)ex->refEntity.shaderRGBA = 0xFFFFFFFF;
	// don't show player's own blood in view
	if ( entityNum == cg.snap->ps.clientNum ) {
		ex->refEntity.renderfx |= RF_THIRD_PERSON;
	}
}



/*
==================
CG_LaunchGib
==================
*/
void CG_LaunchGib( vec3_t origin, vec3_t velocity, qhandle_t hModel ) {
	localEntity_t	*le;
	refEntity_t		*re;

	le = CG_AllocLocalEntity();
	re = &le->refEntity;

	le->leType = LE_FRAGMENT;
	le->startTime = cg.time;
	le->endTime = le->startTime + 5000 + random() * 3000;

	VectorCopy( origin, re->origin );
	AxisCopy( axisDefault, re->axis );
	re->hModel = hModel;

	le->pos.trType = TR_GRAVITY;
	VectorCopy( origin, le->pos.trBase );
	VectorCopy( velocity, le->pos.trDelta );
	le->pos.trTime = cg.time;

	le->bounceFactor = 0.6f;

	le->leBounceSoundType = LEBS_BLOOD;
	le->leMarkType = LEMT_BLOOD;
}

/*
===================
CG_GibPlayer

Generated a bunch of gibs launching out from the bodies location
===================
*/
#define	GIB_VELOCITY	250
#define	GIB_JUMP		250
void CG_GibPlayer( vec3_t playerOrigin ) {
	vec3_t	velocity;
	int i;

	if ( !cg_blood.integer ) {
		return;
	}
	// allow gibs to be turned off for speed
	if ( !cg_gibs.integer ) {
		return;
	}

	for (i=0; i < 4; i++)
	{
		velocity[0] = crandom()*GIB_VELOCITY;
		velocity[1] = crandom()*GIB_VELOCITY;
		velocity[2] = GIB_JUMP + crandom()*GIB_VELOCITY;
		CG_LaunchGib( playerOrigin, velocity, cgs.media.gibs[i] );
	}
}

/*
==================
CG_LaunchGib
==================
*/
void CG_LaunchExplode( vec3_t origin, vec3_t velocity, qhandle_t hModel ) {
	localEntity_t	*le;
	refEntity_t		*re;

	le = CG_AllocLocalEntity();
	re = &le->refEntity;

	le->leType = LE_FRAGMENT;
	le->startTime = cg.time;
	le->endTime = le->startTime + 1000;

	VectorCopy( origin, re->origin );
	AxisCopy( axisDefault, re->axis );
	re->hModel = hModel;

	le->pos.trType = TR_GRAVITY;
	VectorCopy( origin, le->pos.trBase );
	VectorCopy( velocity, le->pos.trDelta );
	le->pos.trTime = cg.time;

	le->bounceFactor = 0.1f;

	le->leBounceSoundType = LEBS_NONE;
	le->leMarkType = LEMT_NONE;
}

#define	EXP_VELOCITY	600
#define	EXP_JUMP		150
/*
===================
CG_GibPlayer

Generated a bunch of gibs launching out from the bodies location
===================
*/
void CG_BigExplode( vec3_t playerOrigin, qhandle_t hModel ) {
	vec3_t	origin, velocity;
	int i;

	if ( !cg_blood.integer ) {
		return;
	}


	for (i=0; i < 20; i++)
	{
		VectorCopy( playerOrigin, origin );
		velocity[0] = crandom()*EXP_VELOCITY;
		velocity[1] = crandom()*EXP_VELOCITY;
		velocity[2] = EXP_JUMP + crandom()*EXP_VELOCITY;
		CG_LaunchExplode( origin, velocity, hModel );
	}
}