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ShootCommand.java
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ShootCommand.java
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package com.denizenscript.denizen.scripts.commands.entity;
import com.denizenscript.denizen.utilities.Conversion;
import com.denizenscript.denizen.utilities.DenizenAPI;
import com.denizenscript.denizen.utilities.Utilities;
import com.denizenscript.denizen.utilities.entity.Velocity;
import com.denizenscript.denizen.utilities.debugging.Debug;
import com.denizenscript.denizen.utilities.entity.Position;
import com.denizenscript.denizen.nms.NMSHandler;
import com.denizenscript.denizen.objects.EntityTag;
import com.denizenscript.denizen.objects.LocationTag;
import com.denizenscript.denizencore.exceptions.InvalidArgumentsException;
import com.denizenscript.denizencore.objects.*;
import com.denizenscript.denizencore.objects.core.ElementTag;
import com.denizenscript.denizencore.objects.core.ListTag;
import com.denizenscript.denizencore.objects.core.ScriptTag;
import com.denizenscript.denizencore.scripts.ScriptEntry;
import com.denizenscript.denizencore.scripts.commands.AbstractCommand;
import com.denizenscript.denizencore.scripts.commands.Holdable;
import com.denizenscript.denizencore.scripts.queues.ScriptQueue;
import com.denizenscript.denizencore.utilities.CoreUtilities;
import com.denizenscript.denizencore.utilities.ScriptUtilities;
import org.bukkit.Bukkit;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Projectile;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.util.Vector;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.function.Consumer;
public class ShootCommand extends AbstractCommand implements Listener, Holdable {
public ShootCommand() {
setName("shoot");
setSyntax("shoot [<entity>|...] (origin:<entity>/<location>) (destination:<location>) (height:<#.#>) (speed:<#.#>) (script:<name>) (def:<element>|...) (shooter:<entity>) (spread:<#.#>) (lead:<location>) (no_rotate)");
setRequiredArguments(1, 11);
Bukkit.getServer().getPluginManager().registerEvents(this, DenizenAPI.getCurrentInstance());
}
// <--[command]
// @Name Shoot
// @Syntax shoot [<entity>|...] (origin:<entity>/<location>) (destination:<location>) (height:<#.#>) (speed:<#.#>) (script:<name>) (def:<element>|...) (shooter:<entity>) (spread:<#.#>) (lead:<location>) (no_rotate)
// @Required 1
// @Maximum 11
// @Short Shoots an entity through the air, useful for things like firing arrows.
// @Group entity
//
// @Description
// Shoots an entity through the air up to a certain height, optionally triggering a script on impact with a target.
//
// Generally, use the "speed" argument to send an entity exactly the direction you input,
// and don't include it to have the entity automatically attempt to land exactly on the destination by calculating an arc.
//
// If the origin is not an entity, specify a shooter so the damage handling code knows how to assume shot the projectile.
//
// Normally, a list of entities will spawn mounted on top of each other. To have them instead fire separately and spread out,
// specify the 'spread' argument with a decimal number indicating how wide to spread the entities.
//
// Use the 'script:<name>' argument to run a task script when the projectiles land.
// When that script runs, the following definitions will be available:
// <[shot_entities]> for all shot entities (as in, the projectiles),
// <[last_entity]> for the last one (The controlling entity),
// <[location]> for the last known location of the last shot entity, and
// <[hit_entities]> for a list of any entities that were hit by fired projectiles.
//
// Optionally, specify a speed and 'lead' value to use the experimental arrow-aiming system.
//
// Optionally, add 'no_rotate' to prevent the shoot command from rotating launched entities.
//
// The shoot command is ~waitable. Refer to <@link language ~waitable>.
//
// @Tags
// <entry[saveName].shot_entity> returns the single entity that was shot (as in, the projectile) (if you only shot one).
// <entry[saveName].shot_entities> returns a ListTag of entities that were shot (as in, the projectiles).
//
// @Usage
// Use to shoot an arrow from the NPC to perfectly hit the player.
// - shoot arrow origin:<npc> destination:<player.location>
//
// @Usage
// Use to shoot an arrow out of the player with a given speed.
// - shoot arrow origin:<player> speed:2
// -->
Map<UUID, EntityTag> arrows = new HashMap<>();
@Override
public void parseArgs(ScriptEntry scriptEntry) throws InvalidArgumentsException {
for (Argument arg : scriptEntry.getProcessedArgs()) {
if (!scriptEntry.hasObject("origin")
&& arg.matchesPrefix("origin", "o", "source", "s")) {
if (arg.matchesArgumentType(EntityTag.class)) {
scriptEntry.addObject("origin_entity", arg.asType(EntityTag.class));
}
else if (arg.matchesArgumentType(LocationTag.class)) {
scriptEntry.addObject("origin_location", arg.asType(LocationTag.class));
}
else {
Debug.echoError("Ignoring unrecognized argument: " + arg.raw_value);
}
}
else if (!scriptEntry.hasObject("destination")
&& arg.matchesArgumentType(LocationTag.class)
&& arg.matchesPrefix("destination", "d")) {
scriptEntry.addObject("destination", arg.asType(LocationTag.class));
}
else if (!scriptEntry.hasObject("lead")
&& arg.matchesArgumentType(LocationTag.class)
&& arg.matchesPrefix("lead")) {
scriptEntry.addObject("lead", arg.asType(LocationTag.class));
}
else if (!scriptEntry.hasObject("height")
&& arg.matchesFloat()
&& arg.matchesPrefix("height", "h")) {
scriptEntry.addObject("height", arg.asElement());
}
else if (!scriptEntry.hasObject("speed")
&& arg.matchesFloat()
&& arg.matchesPrefix("speed")) {
scriptEntry.addObject("speed", arg.asElement());
}
else if (!scriptEntry.hasObject("script")
&& (arg.matchesArgumentType(ScriptTag.class)
|| arg.matchesPrefix("script"))) {
scriptEntry.addObject("script", arg.asType(ScriptTag.class));
}
else if (!scriptEntry.hasObject("shooter")
&& arg.matchesArgumentType(EntityTag.class)
&& arg.matchesPrefix("shooter")) {
scriptEntry.addObject("shooter", arg.asType(EntityTag.class));
}
else if (!scriptEntry.hasObject("entities")
&& arg.matchesArgumentList(EntityTag.class)) {
scriptEntry.addObject("entities", arg.asType(ListTag.class).filter(EntityTag.class, scriptEntry));
}
// Don't document this argument; it is for debug purposes only
else if (!scriptEntry.hasObject("gravity")
&& arg.matchesFloat()
&& arg.matchesPrefix("gravity", "g")) {
scriptEntry.addObject("gravity", arg.asElement());
}
else if (!scriptEntry.hasObject("spread")
&& arg.matchesFloat()
&& arg.matchesPrefix("spread")) {
scriptEntry.addObject("spread", arg.asElement());
}
else if (!scriptEntry.hasObject("no_rotate")
&& arg.matches("no_rotate")) {
scriptEntry.addObject("no_rotate", new ElementTag(true));
}
else if (arg.matchesPrefix("def", "define", "context")) {
scriptEntry.addObject("definitions", arg.asType(ListTag.class));
}
else {
arg.reportUnhandled();
}
}
// Use the NPC or player's locations as the origin if one is not specified
if (!scriptEntry.hasObject("origin_location")) {
scriptEntry.defaultObject("origin_entity",
Utilities.entryHasNPC(scriptEntry) ? Utilities.getEntryNPC(scriptEntry).getDenizenEntity() : null,
Utilities.entryHasPlayer(scriptEntry) ? Utilities.getEntryPlayer(scriptEntry).getDenizenEntity() : null);
}
scriptEntry.defaultObject("height", new ElementTag(3));
// Check to make sure required arguments have been filled
if (!scriptEntry.hasObject("entities")) {
throw new InvalidArgumentsException("Must specify entity/entities!");
}
if (!scriptEntry.hasObject("origin_entity") && !scriptEntry.hasObject("origin_location")) {
throw new InvalidArgumentsException("Must specify an origin location!");
}
}
@SuppressWarnings("unchecked")
@Override
public void execute(final ScriptEntry scriptEntry) {
EntityTag originEntity = scriptEntry.getObjectTag("origin_entity");
LocationTag originLocation = scriptEntry.hasObject("origin_location") ?
(LocationTag) scriptEntry.getObject("origin_location") :
new LocationTag(originEntity.getEyeLocation()
.add(originEntity.getEyeLocation().getDirection()));
boolean no_rotate = scriptEntry.hasObject("no_rotate") && scriptEntry.getElement("no_rotate").asBoolean();
// If there is no destination set, but there is a shooter, get a point
// in front of the shooter and set it as the destination
final LocationTag destination = scriptEntry.hasObject("destination") ?
(LocationTag) scriptEntry.getObject("destination") :
(originEntity != null ? new LocationTag(originEntity.getEyeLocation().clone()
.add(originEntity.getEyeLocation().clone().getDirection().multiply(30)))
: (originLocation != null ? new LocationTag(originLocation.clone().add(
originLocation.getDirection().multiply(30))) : null));
// TODO: Same as PUSH -- is this the place to do this?
if (destination == null) {
if (scriptEntry.dbCallShouldDebug()) {
Debug.report(scriptEntry, getName(), "No destination specified!");
}
return;
}
final List<EntityTag> entities = (List<EntityTag>) scriptEntry.getObject("entities");
final ScriptTag script = scriptEntry.getObjectTag("script");
final ListTag definitions = scriptEntry.getObjectTag("definitions");
EntityTag shooter = scriptEntry.getObjectTag("shooter");
ElementTag height = scriptEntry.getElement("height");
ElementTag gravity = scriptEntry.getElement("gravity");
ElementTag speed = scriptEntry.getElement("speed");
ElementTag spread = scriptEntry.getElement("spread");
LocationTag lead = scriptEntry.getObjectTag("lead");
if (scriptEntry.dbCallShouldDebug()) {
Debug.report(scriptEntry, getName(), ArgumentHelper.debugObj("origin", originEntity != null ? originEntity : originLocation) +
ArgumentHelper.debugObj("entities", entities.toString()) +
destination.debug() +
height.debug() +
(gravity != null ? gravity.debug() : "") +
(speed != null ? speed.debug() : "") +
(script != null ? script.debug() : "") +
(shooter != null ? shooter.debug() : "") +
(spread != null ? spread.debug() : "") +
(lead != null ? lead.debug() : "") +
(no_rotate ? ArgumentHelper.debugObj("no_rotate", "true") : "") +
(definitions != null ? definitions.debug() : ""));
}
// Keep a ListTag of entities that can be called using <entry[name].shot_entities>
// later in the script queue
final ListTag entityList = new ListTag();
// Go through all the entities, spawning/teleporting and rotating them
for (EntityTag entity : entities) {
if (!entity.isSpawned() || !no_rotate) {
entity.spawnAt(originLocation);
}
// Only add to entityList after the entities have been
// spawned, otherwise you'll get something like "e@skeleton"
// instead of "e@57" on it
entityList.addObject(entity);
if (!no_rotate) {
NMSHandler.getEntityHelper().faceLocation(entity.getBukkitEntity(), destination);
}
// If the current entity is a projectile, set its shooter
// when applicable
if (entity.isProjectile() && (shooter != null || originEntity != null)) {
entity.setShooter(shooter != null ? shooter : originEntity);
// Also, watch for it hitting a target
arrows.put(entity.getUUID(), null);
}
}
// Add entities to context so that the specific entities created/spawned
// can be fetched.
scriptEntry.addObject("shot_entities", entityList);
if (entityList.size() == 1) {
scriptEntry.addObject("shot_entity", entityList.getObject(0));
}
if (spread == null) {
Position.mount(Conversion.convertEntities(entities));
}
// Get the entity at the bottom of the entity list, because
// only its gravity should be affected and tracked considering
// that the other entities will be mounted on it
final EntityTag lastEntity = entities.get(entities.size() - 1);
if (gravity == null) {
gravity = new ElementTag(lastEntity.getEntityType().getGravity());
}
if (speed == null) {
Vector v1 = lastEntity.getLocation().toVector();
Vector v2 = destination.toVector();
Vector v3 = Velocity.calculate(v1, v2, gravity.asDouble(), height.asDouble());
lastEntity.setVelocity(v3);
}
else if (lead == null) {
Vector relative = destination.clone().subtract(originLocation).toVector();
lastEntity.setVelocity(relative.normalize().multiply(speed.asDouble()));
}
else {
double g = 20;
double v = speed.asDouble();
Vector relative = destination.clone().subtract(originLocation).toVector();
double testAng = Velocity.launchAngle(originLocation, destination.toVector(), v, relative.getY(), g);
double hangTime = Velocity.hangtime(testAng, v, relative.getY(), g);
Vector to = destination.clone().add(lead.clone().multiply(hangTime)).toVector();
relative = to.clone().subtract(originLocation.toVector());
double dist = Math.sqrt(relative.getX() * relative.getX() + relative.getZ() * relative.getZ());
if (dist == 0) {
dist = 0.1d;
}
testAng = Velocity.launchAngle(originLocation, to, v, relative.getY(), g);
relative.setY(Math.tan(testAng) * dist);
relative = relative.normalize();
v = v + (1.188 * Math.pow(hangTime, 2));
relative = relative.multiply(v / 20.0d);
lastEntity.setVelocity(relative);
}
if (spread != null) {
Vector base = lastEntity.getVelocity().clone();
float sf = spread.asFloat();
for (EntityTag entity : entities) {
Vector newvel = Velocity.spread(base, (CoreUtilities.getRandom().nextDouble() > 0.5f ? 1 : -1) * Math.toRadians(CoreUtilities.getRandom().nextDouble() * sf),
(CoreUtilities.getRandom().nextDouble() > 0.5f ? 1 : -1) * Math.toRadians(CoreUtilities.getRandom().nextDouble() * sf));
entity.setVelocity(newvel);
}
}
final LocationTag start = new LocationTag(lastEntity.getLocation());
final Vector start_vel = lastEntity.getVelocity();
// A task used to trigger a script if the entity is no longer
// being shot, when the script argument is used
BukkitRunnable task = new BukkitRunnable() {
boolean flying = true;
LocationTag lastLocation = null;
Vector lastVelocity = null;
public void run() {
// If the entity is no longer spawned, stop the task
if (!lastEntity.isSpawned()) {
flying = false;
}
// Otherwise, if the entity is no longer traveling through
// the air, stop the task
else if (lastLocation != null && lastVelocity != null) {
if (lastLocation.distanceSquared(lastEntity.getBukkitEntity().getLocation()) < 1
&& lastVelocity.distanceSquared(lastEntity.getBukkitEntity().getVelocity()) < 0.1) {
flying = false;
}
}
// Stop the task and run the script if conditions
// are met
if (!flying) {
this.cancel();
if (script != null) {
if (lastLocation == null) {
lastLocation = start;
}
if (lastVelocity == null) {
lastVelocity = start_vel;
}
ListTag hitEntities = new ListTag();
for (EntityTag entity : entities) {
if (arrows.containsKey(entity.getUUID())) {
EntityTag hit = arrows.get(entity.getUUID());
arrows.remove(entity.getUUID());
if (hit != null) {
hitEntities.addObject(hit);
}
}
}
Consumer<ScriptQueue> configure = (queue) -> {
queue.addDefinition("location", lastLocation);
queue.addDefinition("shot_entities", entityList);
queue.addDefinition("last_entity", lastEntity);
queue.addDefinition("hit_entities", hitEntities);
};
ScriptUtilities.createAndStartQueue(script.getContainer(), null, scriptEntry.entryData, null, configure, null, null, definitions, scriptEntry);
}
scriptEntry.setFinished(true);
}
else {
// Record its position in case the entity dies
lastLocation = lastEntity.getLocation();
lastVelocity = lastEntity.getVelocity();
}
}
};
task.runTaskTimer(DenizenAPI.getCurrentInstance(), 1, 2);
}
@EventHandler
public void arrowDamage(EntityDamageByEntityEvent event) {
// Get the damager
Entity arrow = event.getDamager();
// First, quickly confirm it's a projectile (relevant at all)
if (!(arrow instanceof Projectile)) {
return;
}
// Second, more slowly check if we shot it
if (!arrows.containsKey(arrow.getUniqueId())) {
return;
}
// Replace its entry with the hit entity.
arrows.remove(arrow.getUniqueId());
arrows.put(arrow.getUniqueId(), new EntityTag(event.getEntity()));
}
}