Health Bar Overlay

1package com.example;
2
3import net.runelite.api.Client;
4import net.runelite.api.Player;
5import net.runelite.client.ui.overlay.Overlay;
6import net.runelite.client.ui.overlay.OverlayManager;
7import net.runelite.client.plugins.Plugin;
8import net.runelite.client.plugins.PluginDescriptor;
9import javax.inject.Inject;
10import java.awt.*;
11
12@PluginDescriptor(
13    name = "Health Bar",
14    description = "Shows health bar above player"
15)
16public class HealthBarPlugin extends Plugin {
17    @Inject
18    private Client client;
19
20    @Inject
21    private OverlayManager overlayManager;
22
23    private final Overlay overlay = new Overlay() {
24        @Override
25        public Dimension render(Graphics2D graphics) {
26            Player player = client.getLocalPlayer();
27            if (player == null) {
28                return null;
29            }
30
31            Point screenPos = player.getCanvasLocation();
32            if (screenPos == null) {
33                return null;
34            }
35
36            // Use Actor.getHealthRatio() - returns ratio (0-255)
37            int healthRatio = player.getHealthRatio();
38            int maxHP = player.getMaxHealth();
39            if (maxHP == 0) {
40                maxHP = 255; // Fallback if max HP not available
41            }
42            
43            // Calculate current HP from ratio
44            int currentHP = (healthRatio * maxHP) / 255;
45            int healthPercent = (currentHP * 100) / maxHP;
46
47            // Draw background
48            graphics.setColor(new Color(0, 0, 0, 150));
49            graphics.fillRect(screenPos.x - 25, screenPos.y - 40, 50, 8);
50
51            // Draw health bar
52            int barWidth = (50 * healthPercent) / 100;
53            Color healthColor = healthPercent > 50 ? Color.GREEN : 
54                               healthPercent > 25 ? Color.YELLOW : Color.RED;
55            graphics.setColor(healthColor);
56            graphics.fillRect(screenPos.x - 25, screenPos.y - 40, barWidth, 8);
57
58            // Draw border
59            graphics.setColor(Color.WHITE);
60            graphics.drawRect(screenPos.x - 25, screenPos.y - 40, 50, 8);
61
62            return null;
63        }
64    };
65
66    {
67        overlay.setLayer(OverlayLayer.ABOVE_SCENE);
68    }
69
70    @Override
71    protected void startUp() {
72        overlayManager.add(overlay);
73    }
74
75    @Override
76    protected void shutDown() {
77        overlayManager.remove(overlay);
78    }
79}