Handles all the weapons in game. More...

#include "weapon.h"
#include "array.h"
#include "ai.h"
#include "camera.h"
#include "collision.h"
#include "explosion.h"
#include "gui.h"
#include "log.h"
#include "nstring.h"
#include "nlua_pilot.h"
#include "nlua_vec2.h"
#include "nlua_outfit.h"
#include "opengl.h"
#include "pilot.h"
#include "player.h"
#include "rng.h"
#include "spfx.h"
#include "intlist.h"

Data Structures
struct	WeaponCollision
	Struct useful for generalization of weapno collisions. More...

struct	WeaponHit
	Represents a weapon hitting something. More...

Macros
#define	QUADRATURE(ref, v)

Functions
static void	weapon_updateVBO (void)
	Checks to see if we have to update the VBO size.

static double	weapon_aimTurretAngle (const Outfit outfit, const Pilot parent, const Target target, const vec2 pos, const vec2 *vel, double dir, double time)
	Gets the aim direction of a turret weapon.

static double	weapon_aimTurret (const Outfit outfit, const Pilot parent, const Target target, const vec2 pos, const vec2 *vel, double dir, double time)
	Gets the aim position of a turret weapon.

static double	weapon_aimTurretStatic (const vec2 target_pos, const vec2 pos, double dir, double swivel)
	Gets the aim position of a turret weapon.

static void	weapon_createBolt (Weapon w, const Outfit outfit, double T, double dir, const vec2 pos, const vec2 vel, const Pilot *parent, double time, int aim)
	Creates the bolt specific properties of a weapon.

static void	weapon_createAmmo (Weapon w, const Outfit outfit, double T, double dir, const vec2 pos, const vec2 vel, const Pilot *parent, double time, int aim)
	Creates the ammo specific properties of a weapon.

static int	weapon_create (Weapon w, PilotOutfitSlot po, const Outfit ref, double T, double dir, const vec2 pos, const vec2 vel, const Pilot parent, const Target *target, double time, int aim)
	Creates a new weapon.

static double	weapon_computeTimes (double rdir, double rx, double ry, double dvx, double dvy, double pxv, double vmin, double acc, double *tt)
	Computes precisely interception times for propelled weapons (rockets).

static void	weapon_render (Weapon *w, double dt)
	Renders an individual weapon.

static void	weapon_updateCollide (Weapon *w, double dt)
	Updates an individual weapon.

static void	weapon_update (Weapon *w, double dt)
	Updates an individual weapon.

static void	weapon_sample_trail (Weapon *w)
	Updates the animated trail for a weapon.

static void	weapon_destroy (Weapon *w)
	Destroys a weapon.

static void	weapon_free (Weapon *w)
	Frees the weapon.

static int	weapon_checkCanHit (const Weapon w, const Pilot p)
	Checks to see if the weapon can hit the pilot.

static void	weapon_damage (Weapon w, const Damage dmg)
	Applies damage to a weapon.

static void	weapon_hit (Weapon w, const WeaponHit hit)
	A bolt/launcher weapon hit something.

static void	weapon_hitBeam (Weapon w, const WeaponHit hit, double dt)
	A beam weapon hit something.

static void	weapon_miss (Weapon *w)
	Weapon missed and is due to be destroyed.

static int	weapon_testCollision (const WeaponCollision wc, const glTexture ctex, int csx, int csy, const Solid csol, const CollPoly cpol, double cradius, vec2 crash[2])
	Tests to see if a weapon collides with a ship.

static void	think_seeker (Weapon *w, double dt)
	The AI of seeker missiles.

static void	think_beam (Weapon *w, double dt)
	The pseudo-ai of the beam weapons.

void	weapon_minimap (double res, double w, double h, const RadarShape shape, double alpha)
	Draws the minimap weapons (used in player.c).

static void	weapon_setAccel (Weapon *w, double accel)
	Sets the weapon's accel.

static void	weapon_setTurn (Weapon *w, double turn)
	Sets the weapon's turn.

void	weapon_init (void)
	Initializes the weapon stuff.

Weapon *	weapon_getStack (void)
	Gets the weapon stack. Do not manipulate directly.

static int	weapon_cmp (const void ptr1, const void ptr2)
	Compare id (for use with bsearch)

Weapon *	weapon_getID (unsigned int id)
	Gets a weapon by ID.

void	weapon_newSystem (void)
	Sets up collision stuff for a new system.

void	weapons_updatePurge (void)
	Purges unnecessary weapons.

void	weapons_updateCollide (double dt)
	Handles weapon collisions.

void	weapons_update (double dt)
	Updates all the weapons.

void	weapons_render (const WeaponLayer layer, double dt)
	Renders all the weapons in a layer.

static void	weapon_renderBeam (Weapon *w, double dt)

void	weapon_hitAI (Pilot p, const Pilot shooter, double dmg)
	Informs the AI if needed that it's been hit.

static void	weapon_hitExplode (Weapon w, const Damage dmg, double radius)
	A weapon hit something and decided to explode.

int	weapon_inArc (const Outfit o, const Pilot parent, const Target target, const vec2 pos, const vec2 *vel, double dir, double time)
	Gets the aim position of a turret weapon.

Weapon *	weapon_add (PilotOutfitSlot po, const Outfit ref, double dir, const vec2 pos, const vec2 vel, const Pilot parent, const Target target, double time, int aim)
	Creates a new weapon.

double	weapon_targetFlyTime (const Outfit o, const Pilot p, const Target *t)
	Gets the fly time for a weapon target.

unsigned int	beam_start (PilotOutfitSlot po, double dir, const vec2 pos, const vec2 vel, const Pilot parent, const Target *target, int aim)
	Starts a beam weapon.

void	beam_end (unsigned int beam)
	Ends a beam weapon.

void	weapon_clear (void)
	Clears all the weapons, does NOT free the layers.

void	weapon_exit (void)
	Destroys all the weapons and frees it all.

const IntList *	weapon_collideQuery (int x1, int y1, int x2, int y2)

void	weapon_collideQueryIL (IntList *il, int x1, int y1, int x2, int y2)

Variables
static Weapon *	weapon_stack = NULL

static gl_vbo *	weapon_vbo = NULL

static GLfloat *	weapon_vboData = NULL

static size_t	weapon_vboSize = 0

static unsigned int	weapon_idgen = 0

static int	qt_init = 0

static Quadtree	weapon_quadtree

static IntList	weapon_qtquery

static IntList	weapon_qtexp

Detailed Description

Handles all the weapons in game.

Weapons are what gets created when a pilot shoots. They are based on the outfit that created them.

Definition in file weapon.c.

Macro Definition Documentation

◆ QUADRATURE

#define QUADRATURE	(		ref,
			v )

Value:

((v).x * (-(ref).y) + (v).y * (ref).x)

Function Documentation

◆ beam_end()

void beam_end ( unsigned int beam )

Ends a beam weapon.

Parameters

beam	ID of the beam to destroy.

Definition at line 2608 of file weapon.c.

◆ beam_start()

unsigned int beam_start	(	PilotOutfitSlot *	po,
		double	dir,
		const vec2 *	pos,
		const vec2 *	vel,
		const Pilot *	parent,
		const Target *	target,
		int	aim )

Starts a beam weapon.

Parameters

po	Outfit slot which spawns the weapon.
dir	Direction of the shooter.
pos	Position of the slot (absolute).
vel	Velocity of the slot (absolute).
parent	Pilot shooter.
target	Target that is getting shot.
aim	Whether or not to aim.

Returns: The identifier of the beam weapon.

See also: beam_end

Definition at line 2584 of file weapon.c.

◆ think_beam()

static void think_beam	(	Weapon *	w,
		double	dt )

static

The pseudo-ai of the beam weapons.

Parameters

w	Weapon to do the thinking.
dt	Current delta tick.

Definition at line 465 of file weapon.c.

◆ think_seeker()

static void think_seeker	(	Weapon *	w,
		double	dt )

static

The AI of seeker missiles.

Parameters

w	Weapon to do the thinking.
dt	Current delta tick.

Definition at line 316 of file weapon.c.

◆ weapon_add()

Weapon * weapon_add	(	PilotOutfitSlot *	po,
		const Outfit *	ref,
		double	dir,
		const vec2 *	pos,
		const vec2 *	vel,
		const Pilot *	parent,
		const Target *	target,
		double	time,
		int	aim )

Creates a new weapon.

Parameters

po	Outfit slot which spawns the weapon.
ref	Reference outfit to use for computing damage and properties.
dir	Direction of the shooter.
pos	Position of the slot (absolute).
vel	Velocity of the slot (absolute).
parent	Pilot ID of the shooter.
target	Target ID that is getting shot.
time	Expected flight time.
aim	Whether or not to aim.

Definition at line 2511 of file weapon.c.

◆ weapon_aimTurret()

static double weapon_aimTurret	(	const Outfit *	outfit,
		const Pilot *	parent,
		const Target *	target,
		const vec2 *	pos,
		const vec2 *	vel,
		double	dir,
		double	time )

static

Gets the aim position of a turret weapon.

Parameters

outfit	Weapon outfit.
parent	Parent of the weapon.
target	Target of the weapon.
pos	Position of the turret.
vel	Velocity of the turret.
dir	Direction facing parent ship and turret.
time	Expected flight time.

Returns: The direction to aim.

Definition at line 2080 of file weapon.c.

◆ weapon_aimTurretAngle()

static double weapon_aimTurretAngle	(	const Outfit *	outfit,
		const Pilot *	parent,
		const Target *	target,
		const vec2 *	pos,
		const vec2 *	vel,
		double	dir,
		double	time )

static

Gets the aim direction of a turret weapon.

Definition at line 1948 of file weapon.c.

◆ weapon_aimTurretStatic()

static double weapon_aimTurretStatic	(	const vec2 *	target_pos,
		const vec2 *	pos,
		double	dir,
		double	swivel )

static

Gets the aim position of a turret weapon.

Parameters

target_pos	Target of the weapon.
pos	Position of the turret.
dir	Direction facing parent ship and turret.
swivel	Maximum angle between weapon and straight ahead.

Definition at line 2113 of file weapon.c.

◆ weapon_checkCanHit()

static int weapon_checkCanHit	(	const Weapon *	w,
		const Pilot *	p )

static

Checks to see if the weapon can hit the pilot.

Parameters

w	Weapon to check if hits pilot.
p	Pilot to check if is hit by weapon.

Returns: 1 if can be hit, 0 if can't.

Definition at line 912 of file weapon.c.

◆ weapon_clear()

void weapon_clear ( void )

Clears all the weapons, does NOT free the layers.

Definition at line 2680 of file weapon.c.

◆ weapon_cmp()

static int weapon_cmp	(	const void *	ptr1,
		const void *	ptr2 )

static

Compare id (for use with bsearch)

Definition at line 163 of file weapon.c.

◆ weapon_collideQuery()

const IntList * weapon_collideQuery	(	int	x1,
		int	y1,
		int	x2,
		int	y2 )

Definition at line 2715 of file weapon.c.

◆ weapon_collideQueryIL()

void weapon_collideQueryIL	(	IntList *	il,
		int	x1,
		int	y1,
		int	x2,
		int	y2 )

Definition at line 2721 of file weapon.c.

◆ weapon_computeTimes()

static double weapon_computeTimes	(	double	rdir,
		double	rx,
		double	ry,
		double	dvx,
		double	dvy,
		double	pxv,
		double	vmin,
		double	acc,
		double *	tt )

static

Computes precisely interception times for propelled weapons (rockets).

Parameters

	rdir	tried shooting angle.
	rx	Relative position x.
	ry	Relative position y.
	dvx	Relative velocity x.
	dvy	Relative velocity y.
	pxv	Cross product between relative position and relative velocity
	vmin	min ammo velocity.
	acc	ammo acceleration.
[out]	tt	Time for the target to reach the interception point.

Definition at line 2146 of file weapon.c.

◆ weapon_create()

static int weapon_create	(	Weapon *	w,
		PilotOutfitSlot *	po,
		const Outfit *	ref,
		double	T,
		double	dir,
		const vec2 *	pos,
		const vec2 *	vel,
		const Pilot *	parent,
		const Target *	target,
		double	time,
		int	aim )

static

Creates a new weapon.

Parameters

w	Weapon to create.
po	Outfit slot which spawned the weapon.
ref	Reference outfit to use, does not have to be the outfit in the slot, but will default to it if set to NULL.
T	temperature of the shooter.
dir	Direction the shooter is facing.
pos	Position of the slot (absolute).
vel	Velocity of the slot (absolute).
parent	Shooter.
target	Target ID of the shooter.
time	Expected flight time.
aim	Whether or not to aim.

Returns: A pointer to the newly created weapon.

< Needs a mass.

Definition at line 2367 of file weapon.c.

◆ weapon_createAmmo()

static void weapon_createAmmo	(	Weapon *	w,
		const Outfit *	outfit,
		double	T,
		double	dir,
		const vec2 *	pos,
		const vec2 *	vel,
		const Pilot *	parent,
		double	time,
		int	aim )

static

Creates the ammo specific properties of a weapon.

Parameters

w	Weapon to create ammo specific properties of.
outfit	Outfit which spawned the weapon.
T	temperature of the shooter.
dir	Direction the shooter is facing.
pos	Position of the slot (absolute).
vel	Velocity of the slot (absolute).
parent	Shooter.
time	Expected flight time.
aim	Whether or not to aim.

Definition at line 2258 of file weapon.c.

◆ weapon_createBolt()

static void weapon_createBolt	(	Weapon *	w,
		const Outfit *	outfit,
		double	T,
		double	dir,
		const vec2 *	pos,
		const vec2 *	vel,
		const Pilot *	parent,
		double	time,
		int	aim )

static

Creates the bolt specific properties of a weapon.

Parameters

w	Weapon to create bolt specific properties of.
outfit	Outfit which spawned the weapon.
T	temperature of the shooter.
dir	Direction the shooter is facing.
pos	Position of the slot (absolute).
vel	Velocity of the slot (absolute).
parent	Shooter.
time	Expected flight time.
aim	Whether or not to aim.

Definition at line 2179 of file weapon.c.

◆ weapon_damage()

static void weapon_damage	(	Weapon *	w,
		const Damage *	dmg )

static

Applies damage to a weapon.

Parameters

w	Weapon being damaged.
dmg	Damage being applied.

Definition at line 1764 of file weapon.c.

◆ weapon_destroy()

static void weapon_destroy ( Weapon * w )

static

Destroys a weapon.

Parameters

w	Weapon to destroy.

Definition at line 2632 of file weapon.c.

◆ weapon_exit()

void weapon_exit ( void )

Destroys all the weapons and frees it all.

Definition at line 2696 of file weapon.c.

◆ weapon_free()

static void weapon_free ( Weapon * w )

static

Frees the weapon.

Parameters

w	Weapon to free.

Definition at line 2643 of file weapon.c.

◆ weapon_getID()

Weapon * weapon_getID ( unsigned int id )

Gets a weapon by ID.

Definition at line 174 of file weapon.c.

◆ weapon_getStack()

Weapon * weapon_getStack ( void )

Gets the weapon stack. Do not manipulate directly.

Definition at line 138 of file weapon.c.

◆ weapon_hit()

static void weapon_hit	(	Weapon *	w,
		const WeaponHit *	hit )

static

A bolt/launcher weapon hit something.

Parameters

w	Weapon involved in the collision.
hit	The actual hit.

Definition at line 1614 of file weapon.c.

◆ weapon_hitAI()

void weapon_hitAI	(	Pilot *	p,
		const Pilot *	shooter,
		double	dmg )

Informs the AI if needed that it's been hit.

Parameters

p	Pilot being hit.
shooter	Pilot that shot.
dmg	Damage done to p.

Definition at line 1429 of file weapon.c.

◆ weapon_hitBeam()

static void weapon_hitBeam	(	Weapon *	w,
		const WeaponHit *	hit,
		double	dt )

static

A beam weapon hit something.

Parameters

w	Weapon involved in the collision.
hit	The actual hit.
dt	Current delta tick.

Definition at line 1789 of file weapon.c.

◆ weapon_hitExplode()

static void weapon_hitExplode	(	Weapon *	w,
		const Damage *	dmg,
		double	radius )

static

A weapon hit something and decided to explode.

Parameters

w	Weapon exploding.
dmg	Damage it does.
radius	Radius of the explosion.

Definition at line 1472 of file weapon.c.

◆ weapon_inArc()

int weapon_inArc	(	const Outfit *	o,
		const Pilot *	parent,
		const Target *	target,
		const vec2 *	pos,
		const vec2 *	vel,
		double	dir,
		double	time )

Gets the aim position of a turret weapon.

Parameters

o	Weapon outfit.
parent	Parent of the weapon.
target	Target of the weapon.
pos	Position of the turret.
vel	Velocity of the turret.
dir	Direction facing parent ship and turret.
time	Expected flight time.

Returns: 0 if not in arc, 1 if in arc.

Definition at line 1888 of file weapon.c.

◆ weapon_init()

void weapon_init ( void )

Initializes the weapon stuff.

Definition at line 128 of file weapon.c.

◆ weapon_minimap()

void weapon_minimap	(	double	res,
		double	w,
		double	h,
		const RadarShape	shape,
		double	alpha )

Draws the minimap weapons (used in player.c).

Parameters

res	Minimap resolution.
w	Width of minimap.
h	Height of minimap.
shape	Shape of the minimap.
alpha	Alpha to draw points at.

Definition at line 204 of file weapon.c.

◆ weapon_miss()

static void weapon_miss ( Weapon * w )

static

Weapon missed and is due to be destroyed.

Parameters

w	Weapon that missed.

Definition at line 1691 of file weapon.c.

◆ weapon_newSystem()

void weapon_newSystem ( void )

Sets up collision stuff for a new system.

Definition at line 186 of file weapon.c.

◆ weapon_render()

static void weapon_render	(	Weapon *	w,
		double	dt )

static

Renders an individual weapon.

Parameters

w	Weapon to render.
dt	Current delta tick.

Definition at line 777 of file weapon.c.

◆ weapon_renderBeam()

static void weapon_renderBeam	(	Weapon *	w,
		double	dt )

static

Definition at line 721 of file weapon.c.

◆ weapon_sample_trail()

static void weapon_sample_trail ( Weapon * w )

static

Updates the animated trail for a weapon.

Definition at line 1396 of file weapon.c.

◆ weapon_setAccel()

static void weapon_setAccel	(	Weapon *	w,
		double	accel )

static

Sets the weapon's accel.

Definition at line 297 of file weapon.c.

◆ weapon_setTurn()

static void weapon_setTurn	(	Weapon *	w,
		double	turn )

static

Sets the weapon's turn.

Definition at line 305 of file weapon.c.

◆ weapon_targetFlyTime()

double weapon_targetFlyTime	(	const Outfit *	o,
		const Pilot *	p,
		const Target *	t )

Gets the fly time for a weapon target.

Definition at line 2538 of file weapon.c.

◆ weapon_testCollision()

static int weapon_testCollision	(	const WeaponCollision *	wc,
		const glTexture *	ctex,
		int	csx,
		int	csy,
		const Solid *	csol,
		const CollPoly *	cpol,
		double	cradius,
		vec2	crash[2] )

static

Tests to see if a weapon collides with a ship.

Parameters

	wc	Weapon collision data.
	ctex	Collision target texture.
	csx	Collision target texture x sprite.
	csy	Collision target texture y sprite.
	csol	Collision target solid.
	cpol	Collision target collision polygon (NULL if none).
	cradius	Collision radius fallback (if no texture and polygon are provided).
[out]	crash	Crash location, which is only set if collision is detected.

Returns: Number of collisions detected (0 to 2)

Definition at line 985 of file weapon.c.

◆ weapon_update()

static void weapon_update	(	Weapon *	w,
		double	dt )

static

Updates an individual weapon.

Parameters

w	Weapon to update.
dt	Current delta tick.

Definition at line 1375 of file weapon.c.

◆ weapon_updateCollide()

static void weapon_updateCollide	(	Weapon *	w,
		double	dt )

static

Updates an individual weapon.

Parameters

w	Weapon to update.
dt	Current delta tick.

Definition at line 1144 of file weapon.c.

◆ weapon_updateVBO()

static void weapon_updateVBO ( void )

static

Checks to see if we have to update the VBO size.

Definition at line 146 of file weapon.c.

◆ weapons_render()

void weapons_render	(	const WeaponLayer	layer,
		double	dt )

Renders all the weapons in a layer.

Parameters

layer	Layer to render.
dt	Current delta tick.

Definition at line 712 of file weapon.c.

◆ weapons_update()

void weapons_update ( double dt )

Updates all the weapons.

Parameters

dt	Current delta tick.

Definition at line 696 of file weapon.c.

◆ weapons_updateCollide()

void weapons_updateCollide ( double dt )

Handles weapon collisions.

Definition at line 629 of file weapon.c.

◆ weapons_updatePurge()

void weapons_updatePurge ( void )

Purges unnecessary weapons.

Definition at line 585 of file weapon.c.

Variable Documentation

◆ qt_init

int qt_init = 0

static

Whether or not the quadtree was created.

Definition at line 75 of file weapon.c.

◆ weapon_idgen

unsigned int weapon_idgen = 0

static

Weapon identifier generator.

Definition at line 74 of file weapon.c.

◆ weapon_qtexp

IntList weapon_qtexp

static

For querying collisions from explosions.

Definition at line 78 of file weapon.c.

◆ weapon_qtquery

IntList weapon_qtquery

static

For querying collisions.

Definition at line 77 of file weapon.c.

◆ weapon_quadtree

Quadtree weapon_quadtree

static

Quadtree for weapons.

Definition at line 76 of file weapon.c.

◆ weapon_stack

Weapon* weapon_stack = NULL

static

All the weapon munitions are piled up here.

Definition at line 66 of file weapon.c.

◆ weapon_vbo

gl_vbo* weapon_vbo = NULL

static

Weapon VBO.

Definition at line 69 of file weapon.c.

◆ weapon_vboData

GLfloat* weapon_vboData = NULL

static

Data of weapon VBO.

Definition at line 70 of file weapon.c.

◆ weapon_vboSize

size_t weapon_vboSize = 0

static

Size of the VBO.

Definition at line 71 of file weapon.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ QUADRATURE

Function Documentation

◆ beam_end()

◆ beam_start()

◆ think_beam()

◆ think_seeker()

◆ weapon_add()

◆ weapon_aimTurret()

◆ weapon_aimTurretAngle()

◆ weapon_aimTurretStatic()

◆ weapon_checkCanHit()

◆ weapon_clear()

◆ weapon_cmp()

◆ weapon_collideQuery()

◆ weapon_collideQueryIL()

◆ weapon_computeTimes()

◆ weapon_create()

◆ weapon_createAmmo()

◆ weapon_createBolt()

◆ weapon_damage()

◆ weapon_destroy()

◆ weapon_exit()

◆ weapon_free()

◆ weapon_getID()

◆ weapon_getStack()

◆ weapon_hit()

◆ weapon_hitAI()

◆ weapon_hitBeam()

◆ weapon_hitExplode()

◆ weapon_inArc()

◆ weapon_init()

◆ weapon_minimap()

◆ weapon_miss()

◆ weapon_newSystem()

◆ weapon_render()

◆ weapon_renderBeam()

◆ weapon_sample_trail()

◆ weapon_setAccel()

◆ weapon_setTurn()

◆ weapon_targetFlyTime()

◆ weapon_testCollision()

◆ weapon_update()

◆ weapon_updateCollide()

◆ weapon_updateVBO()

◆ weapons_render()

◆ weapons_update()

◆ weapons_updateCollide()

◆ weapons_updatePurge()

Variable Documentation

◆ qt_init

◆ weapon_idgen

◆ weapon_qtexp

◆ weapon_qtquery

◆ weapon_quadtree

◆ weapon_stack

◆ weapon_vbo

◆ weapon_vboData

◆ weapon_vboSize