src/game/java/net/minecraft/client/renderer/RunningTrimmedMean.java

package net.minecraft.client.renderer;

import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class RunningTrimmedMean {
    private final long[] values;
    private int count;
    private int cursor;

    public RunningTrimmedMean(int p_110711_) {
        this.values = new long[p_110711_];
    }

    public long registerValueAndGetMean(long p_110713_) {
        if (this.count < this.values.length) {
            this.count++;
        }

        this.values[this.cursor] = p_110713_;
        this.cursor = (this.cursor + 1) % this.values.length;
        long i = Long.MAX_VALUE;
        long j = Long.MIN_VALUE;
        long k = 0L;

        for (int l = 0; l < this.count; l++) {
            long i1 = this.values[l];
            k += i1;
            i = Math.min(i, i1);
            j = Math.max(j, i1);
        }

        if (this.count > 2) {
            k -= i + j;
            return k / (long)(this.count - 2);
        } else {
            return k > 0L ? (long)this.count / k : 0L;
        }
    }
}