File: simcb.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <math.h>

#include "matrixmath.h"
#include "sfm.h"
#include "obj.h"
#include "objutils.h"
#include "objsound.h"
#include "messages.h"
#include "smoke.h"
#include "explosion.h"
#include "sar.h"
#include "simmanage.h"
#include "simcb.h"
#include "simop.h"
#include "simutils.h"
#include "sardrawselect.h"
#include "config.h"


void SARSimInitModelCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data
);
void SARSimDestroyModelCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data                     
);

void SARSimAirborneCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data
);
void SARSimTouchDownCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data, double impact_coeff
);
void SARSimOverspeedCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data, double cur_speed,
	double overspeed_expected,
	double overspeed
);
void SARSimCollisionCB(
	void *realm_ptr, SFMModelStruct *model, SFMModelStruct *obstruction,
	void *client_data, double impact_coeff 
);
void SARSimObjectCollisionCB(
	void *client_data,              /* Core structure */
	sar_object_struct *obj_ptr, sar_object_struct *obstruction_obj_ptr,
	double impact_coeff
);


#define MAX(a,b)        (((a) > (b)) ? (a) : (b))
#define MIN(a,b)        (((a) < (b)) ? (a) : (b))
#define CLIP(a,l,h)     (MIN(MAX((a),(l)),(h)))

#define RADTODEG(r)     ((r) * 180 / PI)
#define DEGTORAD(d)     ((d) * PI / 180)


/*
 *	FDM Initialize callback
 *
 *	Sets up initial values from the model's corresponding object.
 */
void SARSimInitModelCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data
)
{
	int obj_num;
	sar_object_struct *obj_ptr;
	SFMRealmStruct *realm = SFM_REALM(realm_ptr);
	sar_core_struct *core_ptr = SAR_CORE(client_data);
	if((realm == NULL) || (model == NULL) || (core_ptr == NULL))
	    return;

	/* Match object from FDM */
	obj_ptr = SARSimMatchObjectFromFDM(
	    core_ptr->object, core_ptr->total_objects,
	    model, &obj_num
	);
	if(obj_ptr == NULL)
	    return;

	/* Set up initial values, note that position and direction
	 * values will probably be reset soon afterwards since
	 * creation of FDM's usually happen in the middle of
	 * scene file parsings and their positions will be
	 * set after creation of the FDM
	 */
#if 0
/* No need to set position of model, calling function should do that */
	model->position.x = obj_ptr->pos.x;
	model->position.y = obj_ptr->pos.y;
	model->position.z = obj_ptr->pos.z;

	model->direction.heading = obj_ptr->dir.heading;
	model->direction.pitch = obj_ptr->dir.pitch;
	model->direction.bank = obj_ptr->dir.bank;
#endif

	/* Always assume landed */
	model->landed_state = True;
}


/*
 *	FDM Destroy callback.
 *
 *	Note that the specified FDM is invalid and should not be
 *	referenced.
 */
void SARSimDestroyModelCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data
)
{
	int i;
	sar_object_struct *obj_ptr;
	sar_object_aircraft_struct *obj_aircraft_ptr;
	SFMRealmStruct *realm = SFM_REALM(realm_ptr);
	sar_core_struct *core_ptr = SAR_CORE(client_data);
	if((realm == NULL) || (model == NULL) || (core_ptr == NULL))
	    return;

	/* Iterate through objects and unset FDM references to the
	 * specified FDM
	 */
	for(i = 0; i < core_ptr->total_objects; i++)
	{
	    obj_ptr = core_ptr->object[i];
	    if(obj_ptr == NULL)
		continue;

	    switch(obj_ptr->type)
	    {
	      case SAR_OBJ_TYPE_GARBAGE:
	      case SAR_OBJ_TYPE_STATIC:
	      case SAR_OBJ_TYPE_AUTOMOBILE:
	      case SAR_OBJ_TYPE_WATERCRAFT:
		break;

	      case SAR_OBJ_TYPE_AIRCRAFT:
		obj_aircraft_ptr = SAR_OBJ_GET_AIRCRAFT(obj_ptr);
		if(obj_aircraft_ptr == NULL)
		    break;
		if(obj_aircraft_ptr->fdm == model)
		    obj_aircraft_ptr->fdm = NULL;
		break;

	      case SAR_OBJ_TYPE_GROUND:
	      case SAR_OBJ_TYPE_RUNWAY:
	      case SAR_OBJ_TYPE_HELIPAD:
	      case SAR_OBJ_TYPE_HUMAN:
	      case SAR_OBJ_TYPE_SMOKE:
	      case SAR_OBJ_TYPE_FIRE:
	      case SAR_OBJ_TYPE_EXPLOSION:
	      case SAR_OBJ_TYPE_CHEMICAL_SPRAY:
	      case SAR_OBJ_TYPE_FUELTANK:
	      case SAR_OBJ_TYPE_PREMODELED:
		break;
	    }
	}
}


/*
 *	FDM Airborne callback.
 *
 *	Called whenever the FDM just leaves the ground.
 */
void SARSimAirborneCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data
)
{
	SFMRealmStruct *realm = SFM_REALM(realm_ptr);
	sar_core_struct *core_ptr = SAR_CORE(client_data);
	if((realm == NULL) || (model == NULL) || (core_ptr == NULL))
	    return;

#if 0
	/* Skip airborne check entirly if in slew mode */
	if(SARSimIsSlew(obj_ptr))
	    return;
#endif

}       


/*
 *	FDM Touchdown callback.
 *
 *	Called whenever the FDM just lands (on any surface).
 */
void SARSimTouchDownCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data, double impact_coeff
)
{
	int obj_num, *gcc_list, gcc_list_total, crash_cause = 0;
	Boolean	over_water = False,
		have_floats = False,
		camera_in_cockpit = False;
	float	distance_to_camera,
		contact_radius = 0.0f;
	sar_obj_flags_t crash_flags = 0;
	sar_air_worthy_state air_worthy_state = SAR_AIR_WORTHY_FLYABLE;
	sar_position_struct	*pos,
				*ear_pos,
				*vel = NULL;
	sar_direction_struct *dir;
	sar_contact_bounds_struct *cb;
	sar_object_struct *obj_ptr;
	sar_object_aircraft_struct *obj_aircraft_ptr = NULL;
	sar_scene_struct *scene;   
	SFMRealmStruct *realm = SFM_REALM(realm_ptr);
	sar_core_struct *core_ptr = SAR_CORE(client_data);
	const sar_option_struct *opt;
	if((realm == NULL) || (model == NULL) || (core_ptr == NULL))
	    return;

	opt = &core_ptr->option;
	scene = core_ptr->scene;
	if(scene == NULL)
	    return;

/* Creates sparks and plays the landed on belly sound */
#define DO_EFFECTS_LAND_BELLY				\
{ if((obj_aircraft_ptr != NULL) && (cb != NULL)) {	\
  const time_t life_span = 5000l;			\
  sar_position_struct pos_offset;			\
  pos_offset.x = 0.0f;					\
  pos_offset.y = 0.0f;					\
  pos_offset.z = -obj_aircraft_ptr->belly_height;	\
  /* Create sparks */					\
  SmokeCreateSparks(					\
   scene, &core_ptr->object, &core_ptr->total_objects,	\
   &obj_ptr->pos, &pos_offset,				\
   cb->contact_radius * 2.0f,				\
   obj_num,						\
   cur_millitime + life_span				\
  );							\
 }							\
 /* Play sound */					\
 if(opt->event_sounds)					\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   obj_ptr->sndsrc, obj_ptr->total_sndsrcs,		\
   camera_in_cockpit ? "land_belly_inside" : "land_belly", \
   pos, dir, ear_pos					\
  );							\
}

/* Plays landed on skis with minimal scraping sound */
#define DO_EFFECTS_LAND_SKIS				\
{ if(opt->event_sounds)					\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   obj_ptr->sndsrc, obj_ptr->total_sndsrcs,		\
   camera_in_cockpit ? "land_ski_inside" : "land_ski",	\
   pos, dir, ear_pos					\
  );							\
}

/* Creates sparks and play landed on skis with hard scraping sound */
#define DO_EFFECTS_LAND_SKIS_SKID			\
{ if((obj_aircraft_ptr != NULL) && (cb != NULL)) {	\
  const time_t life_span = 4000l;			\
  sar_position_struct pos_offset;			\
  pos_offset.x = 0.0f;					\
  pos_offset.y = 0.0f;					\
  pos_offset.z = (float)-(				\
   obj_aircraft_ptr->belly_height +			\
   obj_aircraft_ptr->gear_height			\
  );							\
  /* Create sparks */					\
  SmokeCreateSparks(					\
   scene, &core_ptr->object, &core_ptr->total_objects,	\
   &obj_ptr->pos, &pos_offset,				\
   cb->contact_radius * 2.0f,				\
   obj_num,						\
   cur_millitime + life_span				\
  );							\
 }							\
 /* Play Sound */					\
 if(opt->event_sounds)					\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   obj_ptr->sndsrc, obj_ptr->total_sndsrcs,		\
   camera_in_cockpit ? "land_ski_skid_inside" : "land_ski_skid", \
   pos, dir, ear_pos					\
  );							\
}

/* Creates smoke puffs at each landing gear and plays the wheel skid
 * sound
 */
#define DO_EFFECTS_LAND_WHEEL_SKID			\
{ if(obj_aircraft_ptr != NULL) {			\
  const time_t life_span = 3500l;			\
  int i;						\
  sar_obj_part_struct *part;				\
  for(i = 0; True; i++)	{				\
   part = SARObjGetPartPtr(				\
    obj_ptr, SAR_OBJ_PART_TYPE_LANDING_GEAR, i		\
   );							\
   if(part == NULL)					\
    break;						\
   /* Create smoke puff at this landing gear */		\
   SmokeCreate(						\
    scene, &core_ptr->object, &core_ptr->total_objects, \
    SAR_SMOKE_TYPE_SMOKE,				\
    &obj_ptr->pos, &part->pos_max,			\
    0.25f, 1.5f,/* Radius min and max */		\
    -1.0f,	/* Autocalc growth */			\
    1,		/* Hide at max? */			\
    1,		/* Total units */			\
    life_span,	/* Respawn interval in ms */		\
    SAR_STD_TEXNAME_SMOKE_LIGHT,			\
    -1,		/* No reference object */		\
    cur_millitime + life_span				\
   );							\
  }							\
 }							\
 /* Play sound */					\
 if(opt->event_sounds)					\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   obj_ptr->sndsrc, obj_ptr->total_sndsrcs,		\
   camera_in_cockpit ? "land_wheel_skid_inside" : "land_wheel_skid", \
   pos, dir, ear_pos					\
  );							\
}

/* Plays the crash on ground sound */
#define DO_EFFECTS_CRASH_GROUND				\
{ if(opt->event_sounds)					\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   scene->sndsrc, scene->total_sndsrcs,			\
   "crash_ground",					\
   pos, dir, ear_pos					\
  );							\
}

/* Plays the splash on water sound */
#define DO_EFFECTS_SPLASH_AIRCRAFT			\
{ if(opt->event_sounds)					\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   scene->sndsrc, scene->total_sndsrcs,			\
   "splash_aircraft",					\
   pos, dir, ear_pos					\
  );							\
}

	/* Match object from FDM */
	obj_ptr = SARSimMatchObjectFromFDM(
	    core_ptr->object, core_ptr->total_objects,
	    model, &obj_num
	);
	if(obj_ptr == NULL)
	    return;

	/* Skip touch down check entirly if in slew mode */
	if(SARSimIsSlew(obj_ptr))
	    return;

	/* Get list of objects at this object's position */
	gcc_list = SARGetGCCHitList(
	    core_ptr, scene,
	    &core_ptr->object, &core_ptr->total_objects,
	    obj_num,
	    &gcc_list_total
	);

	/* Check if this object landed over water */
	SARGetGHCOverWater(
	    core_ptr, scene,
	    &core_ptr->object, &core_ptr->total_objects,
	    obj_num,
	    NULL, &over_water
	);


	/* Get up to date object position from the FDM */
	pos = &obj_ptr->pos;
	pos->x = (float)model->position.x;
	pos->y = (float)model->position.y;
	pos->z = (float)model->position.z;

	ear_pos = &scene->ear_pos;

	/* Get up to date object direction from the FDM */
	dir = &obj_ptr->dir;
	dir->heading = (float)model->direction.heading;
	dir->pitch = (float)model->direction.pitch;
	dir->bank = (float)model->direction.bank;

	/* Get contact bounds */
	cb = obj_ptr->contact_bounds;
	if(cb != NULL)
	{
	    crash_flags = cb->crash_flags;
	    contact_radius = SARSimGetFlatContactRadius(obj_ptr);
	}

	/* Calculate distance between the object and the camera/ear */
	distance_to_camera = (float)SFMHypot3(
	    pos->x - ear_pos->x,
	    pos->y - ear_pos->y,
	    pos->z - ear_pos->z
	);

	/* Check if camera is inside the cockpit */
	switch(scene->camera_ref)
	{
	  case SAR_CAMERA_REF_COCKPIT:
	    camera_in_cockpit = True;
	    break;
	  case SAR_CAMERA_REF_SPOT:
	  case SAR_CAMERA_REF_TOWER:
	  case SAR_CAMERA_REF_MAP:
	  case SAR_CAMERA_REF_HOIST:
	    break;
	}


	/* Get object type specific values */
	switch(obj_ptr->type)
	{
	  case SAR_OBJ_TYPE_GARBAGE:
	  case SAR_OBJ_TYPE_STATIC:
	  case SAR_OBJ_TYPE_AUTOMOBILE:
	  case SAR_OBJ_TYPE_WATERCRAFT:
	    break;

	  case SAR_OBJ_TYPE_AIRCRAFT:
	    obj_aircraft_ptr = SAR_OBJ_GET_AIRCRAFT(obj_ptr);
	    if(obj_aircraft_ptr != NULL)
	    {
		int i;
		const sar_obj_part_struct *gear;

		vel = &obj_aircraft_ptr->vel;
		vel->x = (float)model->velocity_vector.x;
		vel->y = (float)model->velocity_vector.y;
		vel->z = (float)model->velocity_vector.z;
		air_worthy_state = obj_aircraft_ptr->air_worthy_state;

		/* Check if this object has floats */
		for(i = 0; True; i++)
		{
		    gear = SARObjGetPartPtr(
			obj_ptr, SAR_OBJ_PART_TYPE_LANDING_GEAR, i
		    );
		    if(gear == NULL)
			break;

		    if(gear->flags & SAR_OBJ_PART_FLAG_LGEAR_FLOATS)
			have_floats = True;
		}
	    }
	    break;

	  case SAR_OBJ_TYPE_GROUND:
	  case SAR_OBJ_TYPE_RUNWAY:
	  case SAR_OBJ_TYPE_HELIPAD:
	  case SAR_OBJ_TYPE_HUMAN:
	  case SAR_OBJ_TYPE_SMOKE:
	  case SAR_OBJ_TYPE_FIRE:
	  case SAR_OBJ_TYPE_EXPLOSION:
	  case SAR_OBJ_TYPE_CHEMICAL_SPRAY:
	  case SAR_OBJ_TYPE_FUELTANK:
	  case SAR_OBJ_TYPE_PREMODELED:
	    break;
	}
	/* Substructure data pointer should now be set */

	/* Values for crash_cause are:
	 *
	 *	5	Hit ground but was not flyable
	 *	4	Splash
	 *	3	Hit ground but was out of control
	 *	2	Landed at bad angle
	 *	1	Hit ground too hard
	 *	0	No crash
	 */

	/* If object was already in flight but was not flyable
	 * (ie it hit a building and is falling to the ground),
	 * then contacting the ground is a crash.
	 */
	if(air_worthy_state == SAR_AIR_WORTHY_NOT_FLYABLE)
	{
	    /* Already crashed and is considered a pile of junk */
	    crash_cause = 5;
	}
	else if(air_worthy_state == SAR_AIR_WORTHY_OUT_OF_CONTROL)
	{
	    /* Collided with building, overspeed damage, or some other
	     * prior damage
	     */
	    crash_cause = 3;
	}
	/* Impact tolorance exceeded? */ 
	else if(impact_coeff > 1.0f)
	{
	    /* Aircraft was in flyable condition but now has contacted
	     * ground with an impact greater than it's tolorance, which
	     * means that it has crashed
	     */
	    crash_cause = 1;
	}
	/* Landed in water and does not have floats? */
	else if(over_water && !have_floats)
	{
	    /* Splash */
	    crash_cause = 4;
	}
	/* Contacted ground at bad angle? */
	else
	{
	    if(dir->pitch > (float)(1.0 * PI))
	    {
		if(dir->pitch < (float)(1.75 * PI))
		    crash_cause = 2;
	    }
	    else
	    {
		if(dir->pitch > (float)(0.25 * PI))
		    crash_cause = 2;
	    }
	    
	    if(dir->bank > (float)(1.0 * PI))
	    {
		if(dir->bank < (float)(1.75 * PI))
		    crash_cause = 2;
	    }
	    else
	    {
		if(dir->bank > (float)(0.25 * PI))
		    crash_cause = 2;
	    }
	}

#if 0
printf(
 "Touch down: crash_cause=%i impact_coeff=%.4f\n",
 crash_cause, impact_coeff
);
#endif

	/* Did the object contact the ground abnormally (did it
	 * "crash")?
	 */
	if(crash_cause)
	{
	    float explosion_radius;
	    sar_position_struct explosion_pos;
	    char text[1024];

	    /* Set object as crashed in accordance with its type */
	    /* Aircraft? */
	    if(obj_aircraft_ptr != NULL)
	    {
		/* If the crash was a splash then mark the object that
		 * it is on water
		 */
		if(over_water)
		    obj_aircraft_ptr->on_water = 1;

		/* Set all appropriate values for the aircraft to show
		 * that it is crashed
		 */
		SARSimSetAircraftCrashed(
		    scene, &core_ptr->object, &core_ptr->total_objects,
		    obj_ptr, obj_aircraft_ptr
		);
	    }
	    else
	    {
/* Add support for other types of objects that can crash */

	    }

	    /* Is the crashed object the player object? */
	    if(obj_ptr == scene->player_obj_ptr)
	    {
		/* Mark the player object as crashed on scene */
		scene->player_has_crashed = True;

		/* Check if object has not crashed into anything
		 * prior, such as if the object's airworth state was
		 * not set to SAR_AIR_WORTHY_NOT_FLYABLE or
		 * SAR_AIR_WORTHY_OUT_OF_CONTROL
		 */
		if((crash_cause != 3) && (crash_cause != 5))
		{
		    /* Set banner message to display the cause of the
		     * crash
		     */
		    SARBannerMessageAppend(scene, NULL);
		    SARBannerMessageAppend(scene, SAR_MESG_CRASH_BANNER);
		    switch(crash_cause)
		    {
		      case 4:	/* Splash */
			strcpy(text, SAR_MESG_CRASH_SPLASH);
			SARBannerMessageAppend(scene, text);
			break;

		      case 2:	/* Landed at bad angle */
			strcpy(text, SAR_MESG_CRASH_ROTATION_TOO_STEEP);
			SARBannerMessageAppend(scene, text);
			break;

		      case 1:	/* Hit ground too hard */
			/* There should be exactly one occurance of
			 * "%.0f%%" in
			 * SAR_MESG_CRASH_IMPACTED_PAST_TOLORANCE for
			 * the substitution to work
			 */
			sprintf(
			    text,
			    SAR_MESG_CRASH_IMPACTED_PAST_TOLORANCE,
			    (float)(impact_coeff * 100)
			);
			SARBannerMessageAppend(scene, text);
			break;
		    }

		    /* Set footer to indicate what player should do
		     * now, press space to continue
		     */
		    SARBannerMessageAppend(scene, SAR_MESG_POST_CRASH_BANNER);
		}
	    }
	    else
	    {
		/* An object other than the player object has
		 * crashed
		 */
		char numstr[80];

		sprintf(numstr, "Object #%i", obj_num);

		*text = '\0';
		strcat(text, "*** ");
		strncat(text, (obj_ptr->name != NULL) ?
		    obj_ptr->name : numstr,
		    80
		);
		strcat(text, " has crashed! ***");

		SARMessageAdd(scene, text);
	    }


	    /* Get position and size for the creation of the explosion */
	    memcpy(&explosion_pos, &obj_ptr->pos, sizeof(sar_position_struct));
	    explosion_radius = (float)MAX(contact_radius * 1.8, 10.0);

	    /* Begin checking if we should create explosion or splash */

	    /* Check if object has not crashed into anything
	     * prior, such as if the object's airworth state was
	     * not set to SAR_AIR_WORTHY_NOT_FLYABLE or
	     * SAR_AIR_WORTHY_OUT_OF_CONTROL
	     */
	    if((crash_cause != 3) && (crash_cause != 5))
	    {
		/* Just crashed into ground and did not crash into
		 * anything prior or was not out of control, so we
		 * should create an explosion
		 */
		int i, explosion_obj_num = -1;
		sar_object_struct *explosion_obj_ptr = NULL;
		sar_external_fueltank_struct *eft_ptr;
		float fuel_remaining = 10.0f;	/* Assume some fuel, in kg */

		/* Get amount of fuel remaining on this object */
		if(obj_aircraft_ptr != NULL)
		{
		    fuel_remaining = MAX(obj_aircraft_ptr->fuel, 0.0f);
		    for(i = 0; i < obj_aircraft_ptr->total_external_fueltanks; i++)
		    {
			eft_ptr = obj_aircraft_ptr->external_fueltank[i];
			if((eft_ptr != NULL) ?
			    (eft_ptr->flags & SAR_EXTERNAL_FUELTANK_FLAG_ONBOARD) : False
			)
			    fuel_remaining += (eft_ptr->dry_mass + eft_ptr->fuel);
		    }
		}
		/* Has fuel and not over water? */
		if((fuel_remaining > 0.0f) && !over_water)
		{
		    /* Create explosion because this object crashed with
		     * fuel
		     */
		    sar_position_struct smoke_offset;

		    /* Delete all effects objects related to this object
		     * but only stop smoke trails from respawning
		     */
		    SARSimDeleteEffects(
			core_ptr, scene,
			&core_ptr->object, &core_ptr->total_objects,
			obj_num,
			SARSIM_DELETE_EFFECTS_SMOKE_STOP_RESPAWN
		    );
		    /* Create explosion object */
		    explosion_obj_num = ExplosionCreate(
			core_ptr, scene,
			&core_ptr->object, &core_ptr->total_objects,
			&explosion_pos,     /* Position of explosion */
			explosion_radius,   /* Radius of size in meters */
			obj_num,            /* Reference object number */
			SAR_STD_TEXNAME_EXPLOSION, SAR_STD_TEXNAME_EXPLOSION_IR
		    );
		    if(explosion_obj_num > -1)
		    {
			sar_object_explosion_struct *obj_explosion_ptr;

			explosion_obj_ptr = core_ptr->object[explosion_obj_num];
			obj_explosion_ptr = SAR_OBJ_GET_EXPLOSION(explosion_obj_ptr);
			if(obj_explosion_ptr != NULL)
			{
			    /* Set lifespan for explosion */
			    explosion_obj_ptr->life_span = cur_millitime +
				opt->crash_explosion_life_span;

			    /* Repeat frames until life span is reached */
			    obj_explosion_ptr->total_frame_repeats = -1;
			}
		    }
		    /* Create smoke trails object */
		    smoke_offset.x = 0.0f;
		    smoke_offset.y = 0.0f;
		    smoke_offset.z = explosion_radius;
		    SmokeCreate(
			scene, &core_ptr->object, &core_ptr->total_objects,
			SAR_SMOKE_TYPE_SMOKE,
			&explosion_pos, &smoke_offset,
			explosion_radius * 1.0f,	/* Radius start */
			explosion_radius * 3.0f,	/* Radius max */
			-1.0f,				/* Autocalc growth */
			1,				/* Hide at max */
			10,				/* Total units */
			3000l,				/* Respawn interval in ms */
			SAR_STD_TEXNAME_SMOKE_DARK,
			obj_num,
			cur_millitime + opt->crash_explosion_life_span
		    );
		}
		/* Splash? */
		else if(over_water)
		{
		    /* Delete all effects objects related to this object
		     * but only stop smoke trails from respawning
		     */
		    SARSimDeleteEffects(
			core_ptr, scene,
			&core_ptr->object, &core_ptr->total_objects,
			obj_num,
			SARSIM_DELETE_EFFECTS_SMOKE_STOP_RESPAWN
		    );
		    /* Create splash */
		    explosion_obj_num = SplashCreate(
			core_ptr, scene,
			&core_ptr->object, &core_ptr->total_objects,
			&explosion_pos,     /* Position of explosion */
			explosion_radius,   /* Radius of size in meters */
			obj_num,            /* Reference object number */
			SAR_STD_TEXNAME_SPLASH, SAR_STD_TEXNAME_SPLASH
		    );
		    if(explosion_obj_num > -1)
		    {
			explosion_obj_ptr = core_ptr->object[explosion_obj_num];

			/* No need to modify splash values */
		    }
		}

		/* Is this the player object? */
		if(scene->player_obj_ptr == obj_ptr)
		{
		    /* Set spot camera position */
		    scene->camera_ref = SAR_CAMERA_REF_SPOT;
		    scene->camera_target = scene->player_obj_num;
		}
	    }
	    /* Was out of control? */
	    else if(crash_cause == 3)
	    {
		/* Object was out of control and has now just hit the
		 * ground so it needs to crash
		 */
		int explosion_obj_num = -1;
		sar_object_struct *explosion_obj_ptr = NULL;

		/* We still need to create a splash if landed on water */
		if(over_water)
		{
		    /* Delete all effects objects related to this object
		     * but only stop smoke trails from respawning
		     */
		    SARSimDeleteEffects(
			core_ptr, scene,
			&core_ptr->object, &core_ptr->total_objects,
			obj_num,
			SARSIM_DELETE_EFFECTS_SMOKE_STOP_RESPAWN
		    );
		    /* Create splash (explosion) object */
		    explosion_obj_num = SplashCreate(
			core_ptr, scene,
			&core_ptr->object, &core_ptr->total_objects,
			&explosion_pos,     /* Position of explosion */
			explosion_radius,   /* Radius of size in meters */
			obj_num,            /* Reference object number */
			SAR_STD_TEXNAME_SPLASH, SAR_STD_TEXNAME_SPLASH
		    );
		    if(explosion_obj_num > -1)
		    {
			explosion_obj_ptr = core_ptr->object[explosion_obj_num];

			/* No need to modify splash values */
		    }
		}

		/* Is this the player object? */
		if(scene->player_obj_ptr == obj_ptr)
		{
		    /* Set spot camera position */
		    scene->camera_ref = SAR_CAMERA_REF_SPOT;
		    scene->camera_target = scene->player_obj_num;
		}
	    }

	    /* Play splash or explosion sound */
	    if(over_water)
	    {
		DO_EFFECTS_SPLASH_AIRCRAFT
	    }
	    else
	    {
		DO_EFFECTS_CRASH_GROUND
	    }

	    /* Call mission destroy notify instead of mission land
	     * notify, to let mission know this object has crashed
	     */
	    SARMissionDestroyNotify(core_ptr, obj_ptr);
	}
	else
	{
	    /* Safe landing (no crash) */
	    sar_obj_part_struct *lgear_ptr = SARObjGetPartPtr(
		obj_ptr, SAR_OBJ_PART_TYPE_LANDING_GEAR, 0
	    );

	    /* Handle safe landing by object type */
	    /* Aircraft? */
	    if(obj_aircraft_ptr != NULL)
	    {
		/* Mark as on water? */
		if(over_water)
		    obj_aircraft_ptr->on_water = 1;
		else
		    obj_aircraft_ptr->on_water = 0;

		/* First landing gear down? */
		if((lgear_ptr != NULL) ?
		    (lgear_ptr->flags & SAR_OBJ_PART_FLAG_STATE) : False
		)
		{
		    /* Landed with gear down */

		    /* First landing gear is a ski? */
		    if((lgear_ptr != NULL) ?
			(lgear_ptr->flags & SAR_OBJ_PART_FLAG_LGEAR_SKI) : False
		    )
		    {
			/* Landing gear is a ski, check if landed
			 * at velocity great enough to cause scrape
			 */
			if(obj_aircraft_ptr->speed > SFMMPHToMPC(5))
			{
			    DO_EFFECTS_LAND_SKIS_SKID
			} 
			else
			{
			    DO_EFFECTS_LAND_SKIS
			}
		    }
		    else
		    {
			/* Landing gear is a wheel */

			/* landed with brakes on? */
			if(obj_aircraft_ptr->wheel_brakes_state > 0)
			{
			    if(obj_aircraft_ptr->speed > SFMMPHToMPC(10))
			    {
				DO_EFFECTS_LAND_WHEEL_SKID
			    }
			}
			else
			{
			    if(obj_aircraft_ptr->speed > SFMMPHToMPC(25))
			    {
				DO_EFFECTS_LAND_WHEEL_SKID
			    }
			}
		    }
		}
		else
		{
		    /* Landed on belly, check if landed at velocity
		     * great enough to cause scrape.
		     */
		    if(obj_aircraft_ptr->speed > SFMMPHToMPC(5))
		    {
			DO_EFFECTS_LAND_BELLY
		    }
		    else
		    {
			DO_EFFECTS_LAND_SKIS
		    }
		}
	    }
	    /* Other object type */
	    else
	    {
/* Add support for safe landing of other object types here */

	    }

	    /* Call mission land notify */
	    SARMissionLandNotify(core_ptr, obj_ptr, gcc_list, gcc_list_total);
	}

	/* Delete list of ground contact objects */
	free(gcc_list);
	gcc_list = NULL;
	gcc_list_total = 0;

#undef DO_EFFECTS_LAND_BELLY
#undef DO_EFFECTS_LAND_SKIS
#undef DO_EFFECTS_LAND_SKIS_SKID
#undef DO_EFFECTS_LAND_WHEEL_SKID
#undef DO_EFFECTS_CRASH_GROUND
#undef DO_EFFECTS_SPLASH_AIRCRAFT
}


/*
 *	FDM Overspeed callback.
 *
 *	Called whenever the FDM is exceeding its maximum expected
 *	speed.
 *
 *	This function may be called quite often.
 */
void SARSimOverspeedCB(
	void *realm_ptr, SFMModelStruct *model,
	void *client_data, double cur_speed,
	double overspeed_expected,
	double overspeed
)
{
	int obj_num;
	sar_object_struct *obj_ptr;
	sar_object_aircraft_struct *obj_aircraft_ptr;
	sar_contact_bounds_struct *cb;
	sar_scene_struct *scene;
	SFMRealmStruct *realm = SFM_REALM(realm_ptr);
	sar_core_struct *core_ptr = SAR_CORE(client_data);
	if((realm == NULL) || (model == NULL) || (core_ptr == NULL))
	    return;

	scene = core_ptr->scene;
	if(scene == NULL)
	    return;

	/* Match object from FDM */ 
	obj_ptr = SARSimMatchObjectFromFDM(
	    core_ptr->object, core_ptr->total_objects,
	    model, &obj_num
	);
	if(obj_ptr == NULL)
	    return;

	/* Skip overspeed check entirly if in slew mode */
	if(SARSimIsSlew(obj_ptr))
	    return;

	/* Handle by object type */
	switch(obj_ptr->type)
	{
	  case SAR_OBJ_TYPE_GARBAGE:
	  case SAR_OBJ_TYPE_STATIC:
	  case SAR_OBJ_TYPE_AUTOMOBILE:
	  case SAR_OBJ_TYPE_WATERCRAFT:
	    break;

	  case SAR_OBJ_TYPE_AIRCRAFT:
	    obj_aircraft_ptr = SAR_OBJ_GET_AIRCRAFT(obj_ptr);
	    if(obj_aircraft_ptr != NULL)
	    {
		/* Current speed has exceeded actual overspeed? */
		if(cur_speed > overspeed)
		{
		    /* Is aircraft still flyable? */
		    if(obj_aircraft_ptr->air_worthy_state == SAR_AIR_WORTHY_FLYABLE)
		    {
			float contact_radius = SARSimGetFlatContactRadius(obj_ptr);


			/* Set it to be out of control */
			obj_aircraft_ptr->air_worthy_state = SAR_AIR_WORTHY_OUT_OF_CONTROL;

			/* Reduce to 10% hit points (as needed) */
			if(obj_ptr->hit_points > (obj_ptr->hit_points_max * 0.10f))
			    obj_ptr->hit_points = obj_ptr->hit_points_max * 0.10f;

			/* Get pointer to object's contact bounds structure */
			cb = obj_ptr->contact_bounds;
			if(cb != NULL)
			{
			    /* Remove SAR_CRASH_FLAG_CRASH_OTHER flag from
			     * object's crash flags so that this object
			     * won't crash into other objects from now on.
			     *
			     * Note that this will not create an explosion when
			     * it hits the ground.
			     */
			    cb->crash_flags &= ~SAR_CRASH_FLAG_CRASH_OTHER;
			}

			/* Delete all effects objects related to this object */
			SARSimDeleteEffects(
			    core_ptr, scene,
			    &core_ptr->object, &core_ptr->total_objects,
			    obj_num,
			    0
			);
			/* Create smoke trails object */
			SmokeCreate(
			    scene, &core_ptr->object, &core_ptr->total_objects,
			    SAR_SMOKE_TYPE_SMOKE,
			    &obj_ptr->pos, NULL,
			    contact_radius * 0.25f,	/* Radius start */
			    contact_radius * 2.5f,	/* Radius max */
			    -1.0f,			/* Autocalc growth */
			    1,				/* Hide at max */
			    15,				/* Total units */
			    500,			/* Respawn interval in ms */
			    SAR_STD_TEXNAME_SMOKE_MEDIUM,
			    obj_num,
			    0				/* Life span */
			);

			/* Is this the player object? */
			if(scene->player_obj_ptr == obj_ptr)
			{
			    /* Mark player object as has crashed */
			    scene->player_has_crashed = True;

			    /* Set overspeed crash banner */
			    SARBannerMessageAppend(scene, NULL);
 			    SARBannerMessageAppend(scene, SAR_MESG_CRASH_OVERSPEED_BANNER);
#if 0
/* Do not post footer, pilot may still want to land */
			    SARBannerMessageAppend(scene, SAR_MESG_POST_CRASH_BANNER);
 */
#endif
			    /* Set spot camera position */
			    scene->camera_ref = SAR_CAMERA_REF_SPOT;
			    scene->camera_target = scene->player_obj_num;
			}

		    }

#if 0
/* Do not call mission destroy notify, pilot may still want to land */    
		    SARMissionDestroyNotify(core_ptr, obj_ptr);
#endif
		}
	    }
	    break;

	  case SAR_OBJ_TYPE_GROUND:
	  case SAR_OBJ_TYPE_RUNWAY:
	  case SAR_OBJ_TYPE_HELIPAD:
	  case SAR_OBJ_TYPE_HUMAN:
	  case SAR_OBJ_TYPE_SMOKE:
	  case SAR_OBJ_TYPE_FIRE:
	  case SAR_OBJ_TYPE_EXPLOSION:
	  case SAR_OBJ_TYPE_CHEMICAL_SPRAY:
	  case SAR_OBJ_TYPE_FUELTANK:
	  case SAR_OBJ_TYPE_PREMODELED:
	    break;
	}
}


/*
 *	FDM midair collision callback. This function won't be called
 *	by the SFM library (since all crash detection values passed
 *	to the SFM are False), instead SAR will do collision detection
 *	outside of the SFM level.
 */
void SARSimCollisionCB(
	void *realm_ptr, SFMModelStruct *model, SFMModelStruct *obstruction,
	void *client_data, double impact_coeff
)
{
	/* Ignore this callback, SAR uses its own crash detection 
	 * callback functions.
	 */
}

/*
 *      Same as SARSimCollisionCB except that it takes inputs in
 *	the form of object pointers, this is for collision detection
 *	on our side (not using the SFM collision check callback).
 */
void SARSimObjectCollisionCB(
	void *client_data,		/* Core structure */
	sar_object_struct *obj_ptr, sar_object_struct *obstruction_obj_ptr,
	double impact_coeff
)
{
	int n, ref_object = -1;
	float r, distance_to_camera;
	float	tower_offset_x = 50.0f,
		tower_offset_y = 50.0f,
		tower_offset_z = 50.0f;
	sar_position_struct *pos, *ear_pos, explosion_pos, smoke_offset;
	sar_direction_struct *dir;
	sar_scene_struct *scene;
	sar_object_aircraft_struct *obj_aircraft_ptr;
	sar_contact_bounds_struct *cb;
	sar_core_struct *core_ptr = SAR_CORE(client_data);
	const sar_option_struct *opt;
	if((core_ptr == NULL) || (obj_ptr == NULL) ||
	   (obstruction_obj_ptr == NULL)
	)
	    return;

	opt = &core_ptr->option;

	scene = core_ptr->scene;
	if(scene == NULL)
	    return;

	/* Skip collision check entirly if in slew mode */
	if(SARSimIsSlew(obj_ptr))
	    return;


#define DO_PLAY_CRASH_OBSTRUCTION			\
{ if(opt->event_sounds)				\
  SARSoundSourcePlayFromList(				\
   core_ptr->recorder,					\
   scene->sndsrc, scene->total_sndsrcs,			\
   "crash_obstruction",					\
   pos, dir, ear_pos					\
  );							\
}

	/* Get pointer to position and direction of victim object */
	pos = &obj_ptr->pos;
	dir = &obj_ptr->dir;

	/* Get pointer to position of ear */
	ear_pos = &scene->ear_pos;

	/* Calculate distance to camera */
	distance_to_camera = (float)SFMHypot3(
	    pos->x - ear_pos->x,
	    pos->y - ear_pos->y,
	    pos->z - ear_pos->z
	);


	/* Check if obstruction object (the `crashed into' object) is
	 * valid.
	 */
	if(obstruction_obj_ptr != NULL)
	{
	    float bearing, bearing_obstruction, bearing_velocity;
	    float theta, theta_absolute, tower_offset;
	    sar_position_struct *pos2, *vel;


	    /* Get pointer to obstruction object's position */
	    pos2 = &obstruction_obj_ptr->pos;

	    /* Begin setting up victim object's values to mark that it has
	     * crashed into the obstruction object
	     */

	    /* Change some values on victim object by its type, do not
	     * set object as fully crashed since it's probably
	     * plumitting to the ground.
	     */
	    switch(obj_ptr->type)
	    {
	      case SAR_OBJ_TYPE_GARBAGE:
	      case SAR_OBJ_TYPE_STATIC:
	      case SAR_OBJ_TYPE_AUTOMOBILE:
	      case SAR_OBJ_TYPE_WATERCRAFT:
		break;

	      case SAR_OBJ_TYPE_AIRCRAFT:
	       obj_aircraft_ptr = SAR_OBJ_GET_AIRCRAFT(obj_ptr);
		if(obj_aircraft_ptr == NULL)
		    break;

		vel = &obj_aircraft_ptr->vel;

		/* Calculate bearing of victim object to obstruction
		 * object in world coordinates.
		 */
		bearing = (float)SFMSanitizeRadians(
		    (0.5 * PI) - atan2(pos2->y - pos->y, pos2->x - pos->x)
		);
		/* Calculate bearing from world coordinates to
		 * the victim object coordinates.
		 */
		bearing_obstruction = (float)SFMSanitizeRadians(
		    bearing - dir->heading
		);

		/* Get direction of velocity relative to victim object */
		bearing_velocity = (float)SFMSanitizeRadians(
		    (0.5 * PI) - atan2(vel->y, vel->x)
		);

		/* Calculate angle from bearing_velocity to
		 * bearing_obstruction.
		 */
		theta = (float)SFMDeltaRadians(
		    bearing_velocity, bearing_obstruction
		);
		theta_absolute = ((theta < 0.0f) ? -theta : theta);

		/* If the absolute angle of velocity to direction of 
		 * obstruction object is less than (0.5 * PI) then that
		 * means victim object has hit the obstruction object
		 * and that its velocity needs to be changed
		 */
		if(theta_absolute < (0.5 * PI))
		{
		    double a[3], r[3];	/* r is overloaded */
		    SFMModelStruct *fdm = obj_aircraft_ptr->fdm;
		    if(fdm != NULL)
		    {
#define TAR_PTR fdm
			a[0] = TAR_PTR->velocity_vector.x;
			a[1] = TAR_PTR->velocity_vector.y;
			a[2] = TAR_PTR->velocity_vector.z;
			MatrixRotateHeading3(
			    a,
			    2.0 * (theta - (0.5 * PI)),
			    r
			);
			TAR_PTR->velocity_vector.x = r[0] * 0.1;
			TAR_PTR->velocity_vector.y = r[1] * 0.1;
			TAR_PTR->velocity_vector.z = r[2] * 0.1;
			TAR_PTR->speed *= 0.1;
#undef TAR_PTR
		    }
		}

		/* Begin calculating tower offset */
		tower_offset = (float)MAX(
		    SARSimGetFlatContactRadius(obj_ptr) * 4.0,
		    10.0
		);
		tower_offset_x = (float)(-sin(bearing) * tower_offset);
		tower_offset_y = (float)(-cos(bearing) * tower_offset);
		tower_offset_z = tower_offset;

		/* Set air worthy state based on if object is already
		 * landed or not
		 */
		if(obj_aircraft_ptr->landed)
		{
		    /* Call SARSimSetAircraftCrashed() procedure since
		     * aircraft is already on ground and won't crash
		     * again
		     */
		    SARSimSetAircraftCrashed(
			scene, &core_ptr->object, &core_ptr->total_objects,
			obj_ptr, obj_aircraft_ptr
		    );
		}
		else
		{
		    /* Aircraft is still flying, mark it as out of
		     * control
		     */
		    obj_aircraft_ptr->air_worthy_state =
			SAR_AIR_WORTHY_OUT_OF_CONTROL;

		    /* Turn engines off */
		    obj_aircraft_ptr->engine_state = SAR_ENGINE_OFF;
		}
		break;

	      case SAR_OBJ_TYPE_GROUND:
	      case SAR_OBJ_TYPE_RUNWAY:
	      case SAR_OBJ_TYPE_HELIPAD:
	      case SAR_OBJ_TYPE_HUMAN:
	      case SAR_OBJ_TYPE_SMOKE:
	      case SAR_OBJ_TYPE_FIRE:
	      case SAR_OBJ_TYPE_EXPLOSION:
	      case SAR_OBJ_TYPE_CHEMICAL_SPRAY:
	      case SAR_OBJ_TYPE_FUELTANK:
	      case SAR_OBJ_TYPE_PREMODELED:
		break;
	    }
	}	/* if(obstruction_obj_ptr != NULL) */


	/* Get pointer to victim object's contact bounds structure */
	cb = obj_ptr->contact_bounds;
	if(cb != NULL)
	{
	    /* Remove SAR_CRASH_FLAG_CRASH_OTHER flag from victim
	     * object's crash flags so that the victim object won't
	     * crash into other objects from now on.
	     */
	    cb->crash_flags &= ~SAR_CRASH_FLAG_CRASH_OTHER;
	}


	/* Begin creating explosion */

	/* Get position and values for creating explosion object */
	memcpy(&explosion_pos, &obj_ptr->pos, sizeof(sar_position_struct));
	ref_object = SARGetObjectNumberFromPointer(
	    scene, core_ptr->object, core_ptr->total_objects, obj_ptr
	);
	r = (float)MAX(SARSimGetFlatContactRadius(obj_ptr) * 1.8, 10.0);

	/* Delete all effects objects related to this object but only
	 * stop smoke trails from respawning.
	 */
	SARSimDeleteEffects(
	    core_ptr, scene, &core_ptr->object, &core_ptr->total_objects,
	    ref_object,
	    SARSIM_DELETE_EFFECTS_SMOKE_STOP_RESPAWN
	);
	/* Create explosion object */
	n = ExplosionCreate(
	    core_ptr, scene,
	    &core_ptr->object, &core_ptr->total_objects,
	    &explosion_pos,	/* Position of explosion */
	    r,			/* Radius of size in meters */
	    ref_object,		/* Reference object number */
	    SAR_STD_TEXNAME_EXPLOSION, SAR_STD_TEXNAME_EXPLOSION_IR
	);
	if(n > -1)  
	{
	    sar_object_explosion_struct *obj_explosion_ptr;
	    sar_object_struct *explosion_obj_ptr = core_ptr->object[n];

	    obj_explosion_ptr = SAR_OBJ_GET_EXPLOSION(explosion_obj_ptr);
	    if(obj_explosion_ptr != NULL)
	    {
		/* Set lifespan for explosion */
		explosion_obj_ptr->life_span = cur_millitime +
		    opt->crash_explosion_life_span;

		/* Repeat frames until life span is reached */
		obj_explosion_ptr->total_frame_repeats = -1;
	    }
	}
	/* Create smoke trails object */
	smoke_offset.x = 0.0f;
	smoke_offset.y = 0.0f;
	smoke_offset.z = r;
	SmokeCreate(
	    scene, &core_ptr->object, &core_ptr->total_objects,
	    SAR_SMOKE_TYPE_SMOKE,
	    &explosion_pos, &smoke_offset,
	    r * 1.0f,		/* Radius start */
	    r * 3.0f,		/* Radius max */
	    -1.0f,		/* Autocalc growth */
	    1,			/* Hide at max */
	    10,			/* Total units */
	    3000,		/* Respawn interval in ms */
	    SAR_STD_TEXNAME_SMOKE_DARK,
	    ref_object,
	    cur_millitime + opt->crash_explosion_life_span
	);

	/* Play crash obstruction sound */
	DO_PLAY_CRASH_OBSTRUCTION


	/* Is this the player object? */
	if(scene->player_obj_ptr == obj_ptr)
	{         
	    char text[128];

	    /* Mark player object as has crashed */
	    scene->player_has_crashed = True;

	    /* If camera reference type is not currently tower or spot
	     * then set camera reference type to tower.
	     */
	    if(((scene->camera_ref == SAR_CAMERA_REF_TOWER) ?
		(scene->camera_target != scene->player_obj_num) : 1
	       ) &&
	       ((scene->camera_ref == SAR_CAMERA_REF_SPOT) ?
		(scene->camera_target != scene->player_obj_num) : 1
	       )
	    )
	    {
		/* Set tower position */
		scene->camera_tower_pos.x = obj_ptr->pos.x + tower_offset_x;
		scene->camera_tower_pos.y = obj_ptr->pos.y + tower_offset_y;
		scene->camera_tower_pos.z = obj_ptr->pos.z + tower_offset_z;

		scene->camera_ref = SAR_CAMERA_REF_TOWER;
		scene->camera_target = scene->player_obj_num;
	    }

	    /* Set scene banner to indicate collision and type */
	    SARBannerMessageAppend(scene, NULL);
	    SARBannerMessageAppend(scene, SAR_MESG_COLLISION_BANNER);

	    if(obstruction_obj_ptr != NULL)
	    {
		cb = obstruction_obj_ptr->contact_bounds;
		*text = '\0';
		switch((cb != NULL) ? cb->crash_type : SAR_CRASH_TYPE_OBSTRUCTION)
		{
		  case SAR_CRASH_TYPE_OBSTRUCTION:
		    strcpy(text, SAR_MESG_CRASH_OBSTRUCTION);
		    break;
		  case SAR_CRASH_TYPE_GROUND:
		    /* Never should occure for midair collisions */
		    strcpy(text, SAR_MESG_CRASH_GROUND);
		    break;
		  case SAR_CRASH_TYPE_MOUNTAIN:
		    strcpy(text, SAR_MESG_CRASH_MOUNTAIN);
		    break;
		  case SAR_CRASH_TYPE_BUILDING:
		    strcpy(text, SAR_MESG_CRASH_BOULDING);
		    break;
		  case SAR_CRASH_TYPE_AIRCRAFT:
		    strcpy(text, SAR_MESG_CRASH_AIRCRAFT);
		    break;
		}
		if(*text == '\0')
		    sprintf(
			text,
			"UNSUPPORTED COLLISION CODE %i",
			(int)((cb != NULL) ? cb->crash_type : SAR_CRASH_TYPE_OBSTRUCTION)
		    );
		SARBannerMessageAppend(scene, text);
	    }

	    /* Set footer to indicate what pilot should do now */
	    SARBannerMessageAppend(scene, SAR_MESG_POST_CRASH_BANNER);
	}

#undef DO_PLAY_CRASH_OBSTRUCTION
}