src/game/java/net/minecraft/world/TickRateManager.java

package net.minecraft.world;

import net.minecraft.util.TimeUtil;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.player.Player;

public class TickRateManager {
    public static final float MIN_TICKRATE = 1.0F;
    protected float tickrate = 20.0F;
    protected long nanosecondsPerTick = TimeUtil.NANOSECONDS_PER_SECOND / 20L;
    protected int frozenTicksToRun = 0;
    protected boolean runGameElements = true;
    protected boolean isFrozen = false;

    public void setTickRate(float p_312754_) {
        this.tickrate = Math.max(p_312754_, 1.0F);
        this.nanosecondsPerTick = (long)((double)TimeUtil.NANOSECONDS_PER_SECOND / (double)this.tickrate);
    }

    public float tickrate() {
        return this.tickrate;
    }

    public float millisecondsPerTick() {
        return (float)this.nanosecondsPerTick / (float)TimeUtil.NANOSECONDS_PER_MILLISECOND;
    }

    public long nanosecondsPerTick() {
        return this.nanosecondsPerTick;
    }

    public boolean runsNormally() {
        return this.runGameElements;
    }

    public boolean isSteppingForward() {
        return this.frozenTicksToRun > 0;
    }

    public void setFrozenTicksToRun(int p_312047_) {
        this.frozenTicksToRun = p_312047_;
    }

    public int frozenTicksToRun() {
        return this.frozenTicksToRun;
    }

    public void setFrozen(boolean p_312988_) {
        this.isFrozen = p_312988_;
    }

    public boolean isFrozen() {
        return this.isFrozen;
    }

    public void tick() {
        this.runGameElements = !this.isFrozen || this.frozenTicksToRun > 0;
        if (this.frozenTicksToRun > 0) {
            this.frozenTicksToRun--;
        }
    }

    public boolean isEntityFrozen(Entity p_311574_) {
        return !this.runsNormally() && !(p_311574_ instanceof Player) && p_311574_.countPlayerPassengers() <= 0;
    }
}