mirror of https://github.com/Minestom/Minestom.git
109 lines
3.0 KiB
Java
109 lines
3.0 KiB
Java
package net.minestom.server.entity;
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import net.minestom.server.coordinate.Vec;
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import java.util.Comparator;
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public class ExperienceOrb extends Entity {
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private short experienceCount;
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private Player target;
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private long lastTargetUpdateTick;
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public ExperienceOrb(short experienceCount) {
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super(EntityType.EXPERIENCE_ORB);
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setBoundingBox(0.5f, 0.5f, 0.5f);
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//todo vanilla sets random velocity here?
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this.experienceCount = experienceCount;
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}
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@Override
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public void update(long time) {
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// TODO slide toward nearest player
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//todo water movement
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if (hasNoGravity()) {
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setVelocity(getVelocity().add(0, -0.3f, 0));
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}
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//todo lava
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double d = 8.0;
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if (lastTargetUpdateTick < time - 20 + getEntityId() % 100) {
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if (target == null || target.getPosition().distanceSquared(getPosition()) > 64) {
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this.target = getClosestPlayer(this, 8);
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}
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lastTargetUpdateTick = time;
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}
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if (target != null && target.getGameMode() == GameMode.SPECTATOR) {
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target = null;
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}
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if (target != null) {
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final var pos = getPosition();
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final var targetPos = target.getPosition();
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final Vec toTarget = new Vec(targetPos.x() - pos.x(), targetPos.y() + (target.getEyeHeight() / 2) - pos.y(), targetPos.z() - pos.z());
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double e = toTarget.length(); //could really be lengthSquared
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if (e < 8) {
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double f = 1 - (e / 8);
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setVelocity(getVelocity().add(toTarget.normalize().mul(f * f * 0.1)));
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}
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}
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// Move should be called here
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float g = 0.98f;
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if (this.onGround) {
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// g = 2f;
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g = 0.6f * 0.98f;
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}
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// apply slipperiness
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setVelocity(getVelocity().mul(new Vec(g, 0.98f, g)));
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if (isOnGround()) {
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setVelocity(getVelocity().mul(new Vec(1, -0.9f, 1)));
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}
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}
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@Override
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public void spawn() {
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}
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/**
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* Gets the experience count.
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*
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* @return the experience count
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*/
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public short getExperienceCount() {
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return experienceCount;
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}
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/**
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* Changes the experience count.
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*
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* @param experienceCount the new experience count
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*/
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public void setExperienceCount(short experienceCount) {
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// Remove the entity in order to respawn it with the correct experience count
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getViewers().forEach(this::removeViewer);
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this.experienceCount = experienceCount;
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getViewers().forEach(this::addViewer);
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}
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private Player getClosestPlayer(Entity entity, float maxDistance) {
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Player closest = entity.getInstance()
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.getPlayers()
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.stream()
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.min(Comparator.comparingDouble(a -> a.getDistance(entity)))
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.orElse(null);
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if (closest == null) return null;
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if (closest.getDistance(entity) > maxDistance) return null;
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return closest;
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}
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}
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