Java Entity.getVelocity方法代碼示例

import org.bukkit.entity.Entity; //導入方法依賴的package包/類
public void pullEntityToLocation(Entity e, Location loc) {
    Location entityLoc = e.getLocation();
    entityLoc.setY(entityLoc.getY() + 0.5D);
    e.teleport(entityLoc);
    double g = -0.08D;
    if (loc.getWorld() != entityLoc.getWorld())
        return;
    double d = loc.distance(entityLoc);
    double t = d;
    double v_x = (1.0D + 0.07000000000000001D * t) * (loc.getX() - entityLoc.getX()) / t;
    double v_y = (1.0D + 0.03D * t) * (loc.getY() - entityLoc.getY()) / t - 0.5D * g * t;
    double v_z = (1.0D + 0.07000000000000001D * t) * (loc.getZ() - entityLoc.getZ()) / t;
    Vector v = e.getVelocity();
    v.setX(v_x);
    v.setY(v_y);
    v.setZ(v_z);
    e.setVelocity(v);
    e.setFallDistance(0f);
}
 

import org.bukkit.entity.Entity; //導入方法依賴的package包/類
@Override
protected void execute(Event e) {
	Entity ent = entity.getSingle(e);
	Location to = towards.getSingle(e);
	if (ent == null || to == null) {
		return;
	}
	Vector velocity = ent.getVelocity();
	float fallDistance = ent.getFallDistance();
	Location from = ent.getLocation();
	Vector direction = isToward ? MathUtils.vectorFromLocations(from, to) : MathUtils.vectorFromLocations(to, from);
	ent.teleport(new Location(
		ent.getWorld(),
		from.getX(),
		from.getY(),
		from.getZ(),
		MathUtils.notchYaw(MathUtils.getYaw(direction)),
		MathUtils.notchPitch(MathUtils.getPitch(direction))
	));
	ent.setVelocity(velocity);
	ent.setFallDistance(fallDistance);
}
 

import org.bukkit.entity.Entity; //導入方法依賴的package包/類
public void movePlayer(Entity p, int dx, int dy, int dz) {
	NavyCraft.instance.DebugMessage("Moving player", 4);
	int mccraftspeed = craft.speed;
	if (mccraftspeed > 2) {
		mccraftspeed = 2;
	}

	Vector pVel = p.getVelocity();

	if (dx > 0) {
		dx = craft.speed;
	} else {
		dx = craft.speed * -1;
	}
	if (dy > 0) {
		dy = craft.speed;
	} else {
		dy = craft.speed * -1;
	}
	if (dz > 0) {
		dz = craft.speed;
	} else {
		dz = craft.speed * -1;
	}
	pVel = pVel.add(new Vector(dx, dy, dz));


	if ((pVel.getX() > 10) || (pVel.getZ() > 10) || (pVel.getY() > 10)) {

		System.out.println("Velocity is too high, have to teleport " + p.getEntityId());
		Location pLoc = p.getLocation();
		pLoc.setX(pLoc.getX() + pVel.getX());
		pLoc.setY(pLoc.getY() + pVel.getY() + .05);
		pLoc.setZ(pLoc.getZ() + pVel.getZ());
		p.teleport(pLoc);
	} else {
		p.setVelocity(pVel);
	}
}
 

import org.bukkit.entity.Entity; //導入方法依賴的package包/類
@EventHandler(ignoreCancelled = true)
public void fixEntityDamage(EntityDamageByEntityEvent event) {
    Entity projectile = event.getDamager();
    if(projectile.hasMetadata("customProjectile")) {

        // If the custom projectile replaced an arrow, recreate some effects specific to arrows
        if(projectile.hasMetadata("damage")) {
            boolean critical = projectile.getMetadata("critical").get(0).asBoolean();
            int knockback = projectile.getMetadata("knockback").get(0).asInt();
            double damage = projectile.getMetadata("damage").get(0).asDouble();
            double speed = projectile.getVelocity().length();

            // Reproduce the damage calculation from nms.EntityArrow with the addition of our modifier
            int finalDamage = (int) Math.ceil(speed * damage * this.velocityMod);
            if(critical) {
                finalDamage += random.nextInt(finalDamage / 2 + 2);
            }
            event.setDamage(finalDamage);

            // Flame arrows - target burns for 5 seconds always
            if(projectile.getFireTicks() > 0) {
                event.getEntity().setFireTicks(100);
            }

            // Reproduce the knockback calculation for punch bows
            if(knockback > 0) {
                Vector projectileVelocity = projectile.getVelocity();
                double horizontalSpeed = Math.sqrt(projectileVelocity.getX() * projectileVelocity.getX() +
                                                   projectileVelocity.getZ() * projectileVelocity.getZ());
                Vector velocity = event.getEntity().getVelocity();
                velocity.setX(velocity.getX() + projectileVelocity.getX() * knockback * 0.6 / horizontalSpeed);
                velocity.setY(velocity.getY() + 0.1);
                velocity.setZ(velocity.getZ() + projectileVelocity.getZ() * knockback * 0.6 / horizontalSpeed);
                event.getEntity().setVelocity(velocity);
            }
        }

        // Apply any potion effects attached to the projectile
        if(event.getEntity() instanceof LivingEntity) {
            for(PotionEffect potionEffect : this.potionEffects) {
                ((LivingEntity) event.getEntity()).addPotionEffect(potionEffect);
            }
        }
    }
}