ViaRewind-Legacy-Support/src/main/java/com/viaversion/viarewind/legacysupport/listener/BounceListener.java

57 lines
2.1 KiB
Java

/*
* This file is part of ViaRewind-Legacy-Support - https://github.com/ViaVersion/ViaRewind-Legacy-Support
* Copyright (C) 2018-2024 ViaVersion and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.viaversion.viarewind.legacysupport.listener;
import com.viaversion.viaversion.api.Via;
import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.util.Vector;
@SuppressWarnings({"unchecked", "DataFlowIssue"})
public class BounceListener implements Listener {
@EventHandler
public void onPlayerMove(PlayerMoveEvent e) {
if (e.getTo().getY() >= e.getFrom().getY()) return; // Only check upwards motion
final Player player = e.getPlayer();
if (Via.getAPI().getPlayerVersion(player) >= ProtocolVersion.v1_8.getVersion()) return; // Only apply for 1.7 and below players
if (Math.floor(e.getTo().getY()) + 0.01 < e.getTo().getY()) return;
if (player.isSneaking()) return;
final Block block = e.getTo().clone().add(0, -0.1, 0).getBlock();
if (block.getType() != Material.SLIME_BLOCK) return;
final Vector newVelocity = player.getVelocity();
final double deltaY = (e.getTo().getY() - e.getFrom().getY());
if (deltaY >- 0.11) return; // Only bounce if the player is falling down
newVelocity.setY(-deltaY * 1.05);
player.setVelocity(newVelocity);
}
}