P2P tunnel frequency color indicators (#3610)

src/api/java/appeng/api/parts/IPart.java

@@ -355,4 +355,14 @@ public interface IPart extends IBoxProvider, ICustomCableConnection
 		return null;
 	}
 
+	/**
+	 * Flag to be passed to the renderer.
+	 * 
+	 * @return flag or null
+	 */
+	default Long getRenderFlag()
+	{
+		return null;
+	}
+
 }

src/api/java/appeng/api/parts/IPartBakedModel.java

@@ -0,0 +1,15 @@
+
+package appeng.api.parts;
+
+
+import java.util.List;
+
+import javax.annotation.Nullable;
+
+import net.minecraft.client.renderer.block.model.BakedQuad;
+
+
+public interface IPartBakedModel
+{
+	List<BakedQuad> getPartQuads( @Nullable Long partFlags, long rand );
+}