81 lines
3.1 KiB
Java
81 lines
3.1 KiB
Java
package com.atsuishio.superbwarfare.tools;
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import net.minecraft.util.Mth;
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import net.minecraft.world.entity.player.Player;
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import net.minecraft.world.phys.AABB;
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import net.minecraft.world.phys.Vec3;
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import java.util.LinkedList;
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import java.util.WeakHashMap;
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/**
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* From TAC-Z
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*/
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public final class HitboxHelper {
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// 玩家位置缓存表
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private static final WeakHashMap<Player, LinkedList<Vec3>> PLAYER_POSITION = new WeakHashMap<>();
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// 玩家命中箱缓存表
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private static final WeakHashMap<Player, LinkedList<AABB>> PLAYER_HITBOXES = new WeakHashMap<>();
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// 玩家速度缓存表
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private static final WeakHashMap<Player, LinkedList<Vec3>> PLAYER_VELOCITY = new WeakHashMap<>();
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// 命中箱缓存 Tick 上限
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private static final int SAVE_TICK = Mth.floor(20 + 0.5);
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public static void onPlayerTick(Player player) {
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if (player.isSpectator()) {
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PLAYER_POSITION.remove(player);
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PLAYER_HITBOXES.remove(player);
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PLAYER_VELOCITY.remove(player);
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return;
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}
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LinkedList<Vec3> positions = PLAYER_POSITION.computeIfAbsent(player, p -> new LinkedList<>());
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LinkedList<AABB> boxes = PLAYER_HITBOXES.computeIfAbsent(player, p -> new LinkedList<>());
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LinkedList<Vec3> velocities = PLAYER_VELOCITY.computeIfAbsent(player, p -> new LinkedList<>());
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positions.addFirst(player.position());
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boxes.addFirst(player.getBoundingBox());
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velocities.addFirst(getPlayerVelocity(player));
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// Position 用于速度计算，所以只需要缓存 2 个位置
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if (positions.size() > 2) {
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positions.removeLast();
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}
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// 命中箱和速度缓存数量限制
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if (boxes.size() > SAVE_TICK) {
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boxes.removeLast();
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velocities.removeLast();
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}
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}
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public static void onPlayerLoggedOut(Player player) {
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PLAYER_POSITION.remove(player);
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PLAYER_HITBOXES.remove(player);
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PLAYER_VELOCITY.remove(player);
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}
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public static Vec3 getPlayerVelocity(Player entity) {
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LinkedList<Vec3> positions = PLAYER_POSITION.computeIfAbsent(entity, player -> new LinkedList<>());
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if (positions.size() > 1) {
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Vec3 currPos = positions.getFirst();
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Vec3 prevPos = positions.getLast();
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return new Vec3(currPos.x - prevPos.x, currPos.y - prevPos.y, currPos.z - prevPos.z);
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}
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return new Vec3(0, 0, 0);
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}
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public static AABB getBoundingBox(Player entity, int ping) {
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if (PLAYER_HITBOXES.containsKey(entity)) {
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LinkedList<AABB> boxes = PLAYER_HITBOXES.get(entity);
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int index = Mth.clamp(ping, 0, boxes.size() - 1);
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return boxes.get(index);
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}
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return entity.getBoundingBox();
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}
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public static Vec3 getVelocity(Player entity, int ping) {
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if (PLAYER_VELOCITY.containsKey(entity)) {
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LinkedList<Vec3> velocities = PLAYER_VELOCITY.get(entity);
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int index = Mth.clamp(ping, 0, velocities.size() - 1);
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return velocities.get(index);
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}
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return getPlayerVelocity(entity);
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}
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}
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