secreterproject/src/main/java/net/pivipi/ball/Ball.java

package net.pivipi.ball;

import net.minestom.server.coordinate.Vec;
import net.minestom.server.entity.Entity;
import net.minestom.server.entity.EntityType;
import net.minestom.server.entity.metadata.other.FallingBlockMeta;
import net.minestom.server.instance.block.Block;
import net.pivipi.physics.Physics;
import net.pivipi.world.Stadium;

public class Ball extends Entity {
    private long lastTick;
    
    private final Physics physics = new Physics(this);
    public final Stadium stadium;

    public Ball(Block block, Stadium stadium) {
        super(EntityType.FALLING_BLOCK); // not block display because its movement lags for some reason

        this.setNoGravity(true);
        this.hasPhysics = true;
        
        this.editEntityMeta(FallingBlockMeta.class, meta -> {
        	meta.setBlock(block);
        });
        
        this.stadium = stadium;
    }
    
    public Ball(Stadium stadium) {
    	this(Block.WHITE_WOOL, stadium);
    }
    

    public void update(long time) {
        if (this.lastTick == 0) {
            this.lastTick = time;
        }

        long delay = time - this.lastTick;

        physics.process(delay / 1000.0, stadium.players);

        this.lastTick = time;
    }
    
    public void addVelocity(Vec velocity) {
    	physics.addVelocity(velocity);
    }
    
    public void addPos(Vec vec) {
    	this.teleport(this.getPosition().add(vec));
    }

}