/**
* @brief Throws cargo out in space graphically.
*
* @param pilot ID of the pilot throwing the stuff out
* @param com Commodity to throw out.
* @param quantity Quantity thrown out.
*/
void commodity_Jettison( int pilot, Commodity* com, int quantity )
{
(void)com;
int i;
Pilot* p;
int n, effect;
double px,py, bvx, bvy, r,a, vx,vy;
p = pilot_get( pilot );
n = MAX( 1, RNG(quantity/10, quantity/5) );
px = p->solid->pos.x;
py = p->solid->pos.y;
bvx = p->solid->vel.x;
bvy = p->solid->vel.y;
for (i=0; i<n; i++) {
effect = spfx_get("cargo");
/* Radial distribution gives much nicer results */
r = RNGF()*25 - 12.5;
a = 2. * M_PI * RNGF();
vx = bvx + r*cos(a);
vy = bvy + r*sin(a);
/* Add the cargo effect */
spfx_add( effect, px, py, vx, vy, SPFX_LAYER_BACK );
}
}
/**
* @brief Does explosion in a radius (damage and graphics).
*
* @param x X position of explosion center.
* @param y Y position of explosion center.
* @param vx X velocity of explosion center.
* @param vy Y velocity of explosion center.
* @param radius Radius of the explosion.
* @param dtype Damage type.
* @param damage Damage amount.
* @param parent Parent of the explosion, NULL is none.
* @param mode Defines the explosion behaviour.
*/
void expl_explode( double x, double y, double vx, double vy,
double radius, const Damage *dmg,
const Pilot *parent, int mode )
{
int i, n;
double a, d;
double area;
double ex, ey;
int layer;
int efx;
/* Standard stuff - lazy allocation. */
if (exp_s == -1) {
exp_s = spfx_get("ExpS");
exp_m = spfx_get("ExpM");
exp_l = spfx_get("ExpL");
}
layer = SPFX_LAYER_FRONT;
/* Number of explosions. */
area = M_PI * pow2(radius);
n = (int)(area / 100.);
/* Create explosions. */
for (i=0; i<n; i++) {
/* Get position. */
a = RNGF()*360.;
d = RNGF()*(radius-5.) + 5.;
ex = d*cos(a);
ey = d*sin(a);
/* Create explosion. */
efx = (RNG(0,2)==0) ? exp_m : exp_s;
spfx_add( efx, x+ex, y+ey, vx, vy, layer );
}
/* Final explosion. */
spfx_add( exp_l, x, y, vx, vy, layer );
/* Run the damage. */
if (dmg != NULL)
expl_explodeDamage( x, y, radius, dmg, parent, mode );
}
/**
* @brief Weapon hit the pilot.
*
* @param w Weapon involved in the collision.
* @param p Pilot that got hit.
* @param layer Layer to which the weapon belongs.
* @param pos Position of the hit.
* @param dt Current delta tick.
*/
static void weapon_hitBeam( Weapon* w, Pilot* p, WeaponLayer layer,
Vector2d pos[2], const double dt )
{
(void) layer;
Pilot *parent;
int spfx;
double damage;
DamageType dtype;
WeaponLayer spfx_layer;
/* Get general details. */
parent = pilot_get(w->parent);
damage = outfit_damage(w->outfit) * dt;
dtype = outfit_damageType(w->outfit);
/* Have pilot take damage and get real damage done. */
damage = pilot_hit( p, w->solid, w->parent, dtype, damage );
/* Add sprite, layer depends on whether player shot or not. */
if (w->lockon == -1.) {
/* Get the layer. */
spfx_layer = (p==player) ? SPFX_LAYER_FRONT : SPFX_LAYER_BACK;
/* Choose spfx. */
if (p->shield > 0.)
spfx = outfit_spfxShield(w->outfit);
else
spfx = outfit_spfxArmour(w->outfit);
/* Add graphic. */
spfx_add( spfx, pos[0].x, pos[0].y,
VX(p->solid->vel), VY(p->solid->vel), spfx_layer );
spfx_add( spfx, pos[1].x, pos[1].y,
VX(p->solid->vel), VY(p->solid->vel), spfx_layer );
w->lockon = -2;
}
/* Inform AI that it's been hit. */
weapon_hitAI( p, parent, damage );
}
/**
* @brief Weapon hit the pilot.
*
* @param w Weapon involved in the collision.
* @param p Pilot that got hit.
* @param layer Layer to which the weapon belongs.
* @param pos Position of the hit.
*/
static void weapon_hit( Weapon* w, Pilot* p, WeaponLayer layer, Vector2d* pos )
{
Pilot *parent;
int spfx;
double damage;
DamageType dtype;
WeaponLayer spfx_layer;
int s;
/* Get general details. */
parent = pilot_get(w->parent);
damage = w->strength * outfit_damage(w->outfit);
dtype = outfit_damageType(w->outfit);
/* Play sound if they have it. */
s = outfit_soundHit(w->outfit);
if (s != -1)
w->voice = sound_playPos( s,
w->solid->pos.x,
w->solid->pos.y,
w->solid->vel.x,
w->solid->vel.y);
/* Have pilot take damage and get real damage done. */
damage = pilot_hit( p, w->solid, w->parent, dtype, damage );
/* Get the layer. */
spfx_layer = (p==player) ? SPFX_LAYER_FRONT : SPFX_LAYER_BACK;
/* Choose spfx. */
if (p->shield > 0.)
spfx = outfit_spfxShield(w->outfit);
else
spfx = outfit_spfxArmour(w->outfit);
/* Add sprite, layer depends on whether player shot or not. */
spfx_add( spfx, pos->x, pos->y,
VX(p->solid->vel), VY(p->solid->vel), spfx_layer );
/* Inform AI that it's been hit. */
weapon_hitAI( p, parent, damage );
/* no need for the weapon particle anymore */
weapon_destroy(w,layer);
}
/**
* @brief Updates all the weapons in the layer.
*
* @param dt Current delta tick.
* @param layer Layer to update.
*/
static void weapons_updateLayer( const double dt, const WeaponLayer layer )
{
Weapon **wlayer;
int *nlayer;
Weapon *w;
int i;
int spfx;
int s;
/* Choose layer. */
switch (layer) {
case WEAPON_LAYER_BG:
wlayer = wbackLayer;
nlayer = &nwbackLayer;
break;
case WEAPON_LAYER_FG:
wlayer = wfrontLayer;
nlayer = &nwfrontLayer;
break;
default:
WARN("Unknown weapon layer!");
}
i = 0;
while (i < *nlayer) {
w = wlayer[i];
switch (w->outfit->type) {
/* most missiles behave the same */
case OUTFIT_TYPE_AMMO:
case OUTFIT_TYPE_TURRET_AMMO:
if (w->lockon > 0.) /* decrement lockon */
w->lockon -= dt;
limit_speed( &w->solid->vel, w->outfit->u.amm.speed, dt );
w->timer -= dt;
if (w->timer < 0.) {
spfx = -1;
/* See if we need armour death sprite. */
if (outfit_isProp(w->outfit, OUTFIT_PROP_WEAP_BLOWUP_ARMOUR))
spfx = outfit_spfxArmour(w->outfit);
/* See if we need shield death sprite. */
else if (outfit_isProp(w->outfit, OUTFIT_PROP_WEAP_BLOWUP_SHIELD))
spfx = outfit_spfxShield(w->outfit);
/* Add death sprite if needed. */
if (spfx != -1) {
spfx_add( spfx, w->solid->pos.x, w->solid->pos.y,
w->solid->vel.x, w->solid->vel.y,
SPFX_LAYER_BACK ); /* presume back. */
/* Add sound if explodes and has it. */
s = outfit_soundHit(w->outfit);
if (s != -1)
w->voice = sound_playPos(s,
w->solid->pos.x,
w->solid->pos.y,
w->solid->vel.x,
w->solid->vel.y);
}
weapon_destroy(w,layer);
break;
}
break;
case OUTFIT_TYPE_BOLT:
case OUTFIT_TYPE_TURRET_BOLT:
w->timer -= dt;
if (w->timer < 0.) {
spfx = -1;
/* See if we need armour death sprite. */
if (outfit_isProp(w->outfit, OUTFIT_PROP_WEAP_BLOWUP_ARMOUR))
spfx = outfit_spfxArmour(w->outfit);
/* See if we need shield death sprite. */
else if (outfit_isProp(w->outfit, OUTFIT_PROP_WEAP_BLOWUP_SHIELD))
spfx = outfit_spfxShield(w->outfit);
/* Add death sprite if needed. */
if (spfx != -1) {
spfx_add( spfx, w->solid->pos.x, w->solid->pos.y,
w->solid->vel.x, w->solid->vel.y,
SPFX_LAYER_BACK ); /* presume back. */
/* Add sound if explodes and has it. */
s = outfit_soundHit(w->outfit);
if (s != -1)
w->voice = sound_playPos(s,
w->solid->pos.x,
w->solid->pos.y,
w->solid->vel.x,
w->solid->vel.y);
}
weapon_destroy(w,layer);
break;
}
else if (w->timer < w->falloff)
w->strength = w->timer / w->falloff;
break;
/* Beam weapons handled a part. */
case OUTFIT_TYPE_BEAM:
case OUTFIT_TYPE_TURRET_BEAM:
w->timer -= dt;
if (w->timer < 0.) {
weapon_destroy(w,layer);
break;
}
/* We use the lockon to tell when we have to create explosions. */
w->lockon -= dt;
if (w->lockon < 0.) {
if (w->lockon < -1.)
w->lockon = 0.100;
else
w->lockon = -1.;
}
break;
default:
WARN("Weapon of type '%s' has no update implemented yet!",
w->outfit->name);
break;
}
/* Out of bounds, loop is over. */
if (i >= *nlayer)
break;
/* Only increment if weapon wasn't deleted. */
if (w == wlayer[i]) {
weapon_update(w,dt,layer);
if ((i < *nlayer) && (w == wlayer[i]))
i++;
}
}
}