src/game/java/net/minecraft/client/renderer/debug/GameTestDebugRenderer.java

package net.minecraft.client.renderer.debug;

import com.google.common.collect.Maps;
import com.mojang.blaze3d.vertex.PoseStack;
import java.util.Map;
import java.util.Map.Entry;
import net.minecraft.Util;
import net.minecraft.client.renderer.MultiBufferSource;
import net.minecraft.core.BlockPos;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class GameTestDebugRenderer implements DebugRenderer.SimpleDebugRenderer {
    private static final float PADDING = 0.02F;
    private final Map<BlockPos, GameTestDebugRenderer.Marker> markers = Maps.newHashMap();

    public void addMarker(BlockPos p_113525_, int p_113526_, String p_113527_, int p_113528_) {
        this.markers.put(p_113525_, new GameTestDebugRenderer.Marker(p_113526_, p_113527_, Util.getMillis() + (long)p_113528_));
    }

    @Override
    public void clear() {
        this.markers.clear();
    }

    @Override
    public void render(PoseStack p_113519_, MultiBufferSource p_113520_, double p_113521_, double p_113522_, double p_113523_) {
        long i = Util.getMillis();
        this.markers.entrySet().removeIf(p_113517_ -> i > p_113517_.getValue().removeAtTime);
        this.markers.forEach((p_269737_, p_269738_) -> this.renderMarker(p_113519_, p_113520_, p_269737_, p_269738_));
    }

    private void renderMarker(PoseStack p_270274_, MultiBufferSource p_271018_, BlockPos p_270918_, GameTestDebugRenderer.Marker p_270827_) {
        DebugRenderer.renderFilledBox(
            p_270274_, p_271018_, p_270918_, 0.02F, p_270827_.getR(), p_270827_.getG(), p_270827_.getB(), p_270827_.getA() * 0.75F
        );
        if (!p_270827_.text.isEmpty()) {
            double d0 = (double)p_270918_.getX() + 0.5;
            double d1 = (double)p_270918_.getY() + 1.2;
            double d2 = (double)p_270918_.getZ() + 0.5;
            DebugRenderer.renderFloatingText(p_270274_, p_271018_, p_270827_.text, d0, d1, d2, -1, 0.01F, true, 0.0F, true);
        }
    }

    @OnlyIn(Dist.CLIENT)
    static class Marker {
        public int color;
        public String text;
        public long removeAtTime;

        public Marker(int p_113536_, String p_113537_, long p_113538_) {
            this.color = p_113536_;
            this.text = p_113537_;
            this.removeAtTime = p_113538_;
        }

        public float getR() {
            return (float)(this.color >> 16 & 0xFF) / 255.0F;
        }

        public float getG() {
            return (float)(this.color >> 8 & 0xFF) / 255.0F;
        }

        public float getB() {
            return (float)(this.color & 0xFF) / 255.0F;
        }

        public float getA() {
            return (float)(this.color >> 24 & 0xFF) / 255.0F;
        }
    }
}