fields.c File Reference

Asteroid and mine hazard fields. More...

#include "game.h"

Go to the source code of this file.

Macros
#define	g_acHazardPitchRange   ((const signed char *)&g_nHazardPitchRange)

Functions
void	make_shard (short asteroid, FixedVector direction)
void	init_hazard (short obj, FixedVector position, short moving)
short	try_far_spot (FixedVector *spot, short *moving)
void	manage_hazard (short obj, short slot)
void	extra_hazard (short obj)
void	add_hazard_field (short type, FixedVector center, short radius, short density)
short	easy2see (short obj)
void	remove_hazard (signed char hazard)
void	remove_all_hazards (void)
short	difficulty (void)
short	asteroid_velocity (void)
void	skew_randomly (short obj, short allowReverse)
void	align (int *value, short quantum)
short	near_field (const HazardField *field, const FixedVector *point)
short	within_field (const HazardField *field, const FixedVector *point)
short	rear_sphere (void)
short	ok_hazard_spot (short obj)
short	make_hazard (void)
void	approach (short obj)
void	match_ship_to_eye (void)
void	update_hazards (void)
void	start_hazard_field (short region)
void	check_hazards (void)

Variables
short	g_nHazardReferenceSpeed = 0
short	g_nActiveHazards = 0

Detailed Description

Asteroid and mine hazard fields.

Definition in file fields.c.

Macro Definition Documentation

g_acHazardPitchRange

#define g_acHazardPitchRange   ((const signed char *)&g_nHazardPitchRange)

Definition at line 13 of file fields.c.

Referenced by try_far_spot().

Function Documentation

add_hazard_field()

void add_hazard_field	(	short	type,
		FixedVector	center,
		short	radius,
		short	density )

Definition at line 411 of file fields.c.

References add_hazard_field(), HazardField::center, HazardField::density, g_aHazardFields, g_nHazardFieldCount, HazardField::innerRadius, HazardField::outerRadius, and HazardField::type.

Referenced by add_hazard_field(), and init_ship().

align()

void align	(	int *	value,
		short	quantum )

Definition at line 134 of file fields.c.

References align().

Referenced by align(), and init_hazard().

approach()

void approach

(

short

obj

)

Definition at line 324 of file fields.c.

References AddFixedVectors(), approach(), g_aShipForwardVector, g_aShipPosition, g_aShipVelocity, g_nCannedSceneMode, point_at(), RecordCannedSceneObjectEvent(), and ScaleFixedVector().

Referenced by ApplyCannedSceneObjectEventRecord(), approach(), and manage_hazard().

asteroid_velocity()

short asteroid_velocity

(

void

)

Definition at line 104 of file fields.c.

References asteroid_velocity(), MinShort(), and RandomBelowOrEqual().

Referenced by asteroid_velocity(), and init_hazard().

check_hazards()

void check_hazards

(

void

)

Definition at line 428 of file fields.c.

References check_hazards(), g_aHazardFields, g_aShipPosition, g_bUseEyePositionForHazards, g_nHazardFieldCount, g_pActiveHazardField, near_field(), remove_all_hazards(), and start_hazard_field().

Referenced by auto_pilot_sequence(), check_hazards(), and house_keep().

difficulty()

short difficulty

(

void

)

Definition at line 98 of file fields.c.

References difficulty(), and g_nHazardReferenceSpeed.

Referenced by difficulty(), and init_hazard().

easy2see()

short easy2see

(

short

obj

)

Definition at line 25 of file fields.c.

References easy2see(), g_15_nStoredScreenViewCentreX, g_27_stViewScratchInfo, g_37_nViewCenterY, g_apObjectShape, g_asObjectFlip, g_asObjectScreenAngle, g_asObjectScreenScale, g_asObjectScreenX, g_asObjectScreenY, g_asObjectViewFrame, and GetTransformedShapeBounds().

Referenced by easy2see(), and object_collision().

extra_hazard()

void extra_hazard

(

short

obj

)

Definition at line 317 of file fields.c.

References extra_hazard(), g_aeObjectClass, OBJECT_CLASS_DUST, and OBJECT_CLASS_NULL.

Referenced by extra_hazard(), and update_star_field().

init_hazard()

void init_hazard	(	short	obj,
		FixedVector	position,
		short	moving )

Definition at line 140 of file fields.c.

References AddFixedVectors(), align(), asteroid_velocity(), HazardField::center, difficulty(), distance_between_points(), g_acObjectCollisionGraceTicks, g_aShipForwardVector, g_aShipPosition, g_aShipVelocity, g_asObjectCounter, g_bUseEyePositionForHazards, g_cHazardBaseTravelTime, g_nActiveHazards, g_pActiveHazardField, init_hazard(), kilrathi_near(), MaxShort(), OBJECT_DATA_ASTEROID1, OBJECT_DATA_ASTEROID_FIELD, OBJECT_DATA_SPACE_MINE, point_at(), RandomBelow(), RandomBelowOrEqual(), ScaleFixedVector(), set_objects_data(), skew_randomly(), SubtractFixedVectors(), and HazardField::type.

Referenced by init_hazard(), and make_hazard().

make_hazard()

short make_hazard

(

void

)

Definition at line 302 of file fields.c.

References find_vacant_3d_object(), init_hazard(), make_hazard(), RecordCannedSceneObjectEvent(), and try_far_spot().

Referenced by make_hazard(), start_hazard_field(), and update_hazards().

make_shard()

void make_shard	(	short	asteroid,
		FixedVector	direction )

Definition at line 46 of file fields.c.

References AddFixedVectors(), alter_pitch(), alter_yaw(), find_vacant_3d_object(), fix_objects_ijk(), g_acObjectOwner, g_aShipForwardVector, g_aShipPosition, g_aShipVelocity, g_asObjectCollisionRadius, g_asObjectCounter, make_shard(), OBJECT_DATA_ROCK_CHUNK, RandomInRange(), real_velocity(), RecordCannedSceneObjectEvent(), set_objects_data(), SetVectorFixedPoint(), and signed_random().

Referenced by hit_asteroid(), and make_shard().

manage_hazard()

void manage_hazard	(	short	obj,
		short	slot )

Definition at line 340 of file fields.c.

References approach(), g_asObjectDistance, g_asObjectScreenX, g_asObjectType, g_nRenderedSpaceFrame, manage_hazard(), OBJECT_DATA_PORCUPINE_MINE, ok_hazard_spot(), real_velocity(), and remove_hazard().

Referenced by manage_hazard(), and update_hazards().

match_ship_to_eye()

void match_ship_to_eye

(

void

)

Definition at line 356 of file fields.c.

References HazardField::center, EYE_OBJECT, g_aShipForwardVector, g_aShipPosition, g_aShipRightVector, g_aShipUpVector, g_aShipVelocity, g_nHazardReferenceSpeed, g_pActiveHazardField, match_ship_to_eye(), and ScaleFixedVector().

Referenced by match_ship_to_eye(), and update_hazards().

near_field()

short near_field	(	const HazardField *	field,
		const FixedVector *	point )

Definition at line 220 of file fields.c.

References HazardField::center, HazardField::innerRadius, IsPointWithinRange(), and near_field().

Referenced by check_hazards(), and near_field().

ok_hazard_spot()

short ok_hazard_spot

(

short

obj

)

Definition at line 286 of file fields.c.

References g_aShipPosition, g_asObjectScreenX, IsPointWithinRange(), ok_hazard_spot(), and rear_sphere().

Referenced by manage_hazard(), and ok_hazard_spot().

rear_sphere()

short rear_sphere

(

void

)

Definition at line 279 of file fields.c.

References find_ratio(), g_nHazardReferenceSpeed, and rear_sphere().

Referenced by ok_hazard_spot(), and rear_sphere().

remove_all_hazards()

void remove_all_hazards

(

void

)

Definition at line 83 of file fields.c.

References g_abHazardObjects, g_pActiveHazardField, remove_all_hazards(), and remove_hazard().

Referenced by check_hazards(), free_3Space(), remove_all_hazards(), set_up_action_sphere(), and start_hazard_field().

remove_hazard()

void remove_hazard

(

signed char

hazard

)

Definition at line 74 of file fields.c.

References g_nActiveHazards, MaxShort(), RecordCannedSceneObjectEvent(), remove_hazard(), and remove_object().

Referenced by manage_hazard(), remove_all_hazards(), and remove_hazard().

skew_randomly()

void skew_randomly	(	short	obj,
		short	allowReverse )

Definition at line 110 of file fields.c.

References g_aShipForwardVector, g_aShipRightVector, g_aShipUpVector, negate_vector(), RandomBelow(), and skew_randomly().

Referenced by init_hazard(), and skew_randomly().

start_hazard_field()

void start_hazard_field

(

short

region

)

Definition at line 399 of file fields.c.

References g_abHazardObjects, g_aHazardFields, g_pActiveHazardField, make_hazard(), remove_all_hazards(), and start_hazard_field().

Referenced by check_hazards(), and start_hazard_field().

try_far_spot()

short try_far_spot	(	FixedVector *	spot,
		short *	moving )

Definition at line 235 of file fields.c.

References copy_frame(), find_ratio(), g_acHazardPitchRange, g_anObjectPitchRotation, g_anObjectYawRotation, g_aShipForwardVector, g_aShipPosition, g_aShipRightVector, g_aShipUpVector, g_nCurrentView, g_pActiveHazardField, IsPointWithinRange(), position_relative_ijk(), RandomBelow(), rotate_about_i(), rotate_about_j(), SCRATCH_VIEW_OBJECT, signed_random(), try_far_spot(), and within_field().

Referenced by make_hazard(), and try_far_spot().

update_hazards()

void update_hazards

(

void

)

Definition at line 375 of file fields.c.

References g_abHazardObjects, g_bUseEyePositionForHazards, g_nHazardReferenceSpeed, make_hazard(), manage_hazard(), match_ship_to_eye(), RandomBelowOrEqual(), real_velocity(), and update_hazards().

Referenced by update_hazards(), and update_star_field().

within_field()

short within_field	(	const HazardField *	field,
		const FixedVector *	point )

Definition at line 228 of file fields.c.

References HazardField::center, HazardField::innerRadius, IsPointWithinRange(), and within_field().

Referenced by try_far_spot(), and within_field().

Variable Documentation

g_nActiveHazards

short g_nActiveHazards = 0

Definition at line 9 of file fields.c.

Referenced by init_hazard(), and remove_hazard().

g_nHazardReferenceSpeed

short g_nHazardReferenceSpeed = 0

Definition at line 8 of file fields.c.

Referenced by difficulty(), match_ship_to_eye(), rear_sphere(), and update_hazards().