feat: Implement chaingun pickup face animation and update HUD rendering logic

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

packages/wolf_3d_dart/lib/src/rendering/renderer_backend.dart

@@ -222,10 +222,25 @@ abstract class RendererBackend<T>
   }
 
   void _drawHudFace(WolfEngine engine, List<VgaImage> vgaImages) {
-    final faceRef = engine.data.registry.hud.faceForHealth(
-      engine.player.health,
-    );
-    final int faceIndex = faceRef?.vgaIndex ?? -1;
+    int faceIndex = -1;
+
+    if (engine.player.isChaingunPickupFaceActive) {
+      faceIndex =
+          engine.data.registry.hud.resolve(HudKey.faceGotGatling)?.vgaIndex ??
+          -1;
+    } else {
+      final HudKey faceKey = engine.data.registry.hud.faceKeyForHealth(
+        engine.player.health,
+      );
+      final int baseIndex =
+          engine.data.registry.hud.resolve(faceKey)?.vgaIndex ?? -1;
+      if (baseIndex >= 0) {
+        faceIndex = faceKey == HudKey.faceDead
+            ? baseIndex
+            : baseIndex + engine.player.hudFaceFrame;
+      }
+    }
+
     if (faceIndex >= 0 && faceIndex < vgaImages.length) {
       blitHudVgaImage(vgaImages[faceIndex], 136, 164);
     }

packages/wolf_3d_dart/lib/src/rendering/software_renderer.dart

@@ -190,6 +190,10 @@ class SoftwareRenderer extends RendererBackend<FrameBuffer> {
             ? normalExitColor
             : objTile == MapObject.secretExitTrigger
             ? secretExitColor
+            : objTile == MapObject.goldKey
+            ? goldKeyColor
+            : objTile == MapObject.silverKey
+            ? silverKeyColor
             : (wallTile == 0
                   ? floorColor
                   : (wallTile >= 90 ? doorColor : wallColor));