Add compatibility for Vampirism blood vision

build.gradle

@@ -63,6 +63,7 @@ dependencies {
     includedDependencies 'meldexun:ReflectionUtil:1.0.0@jar'
     buildDependencies 'curse.maven:FairyLights-233342:3068499'
     buildDependencies 'curse.maven:ValkyrienSkies-258371:3286262'
+    buildDependencies 'curse.maven:Vampirism-233029:2890062'
 
     implementation "org.spongepowered:mixin:${mixin_version}"
     annotationProcessor "org.spongepowered:mixin:${mixin_version}:processor"

src/main/java/meldexun/renderlib/RenderLib.java

@@ -25,6 +25,7 @@ public class RenderLib {
 	public static final Logger LOGGER = LogManager.getLogger(MODID);
 	public static boolean isFairyLightsInstalled;
 	public static boolean isValkyrienSkiesInstalled;
+	public static boolean isVampirismInstalled;
 
 	@EventHandler
 	public void onFMLConstructionEvent(FMLConstructionEvent event) {
@@ -41,6 +42,7 @@ public void onFMLConstructionEvent(FMLConstructionEvent event) {
 	public void onFMLPostInitializationEvent(FMLPostInitializationEvent event) {
 		isFairyLightsInstalled = Loader.isModLoaded("fairylights");
 		isValkyrienSkiesInstalled = Loader.isModLoaded("valkyrienskies");
+		isVampirismInstalled = Loader.isModLoaded("vampirism");
 	}
 
 	@SubscribeEvent

src/main/java/meldexun/renderlib/integration/Vampirism.java

@@ -0,0 +1,41 @@
+package meldexun.renderlib.integration;
+
+import java.lang.reflect.Field;
+import java.util.Enumeration;
+import java.util.concurrent.ConcurrentHashMap;
+
+import de.teamlapen.vampirism.client.render.RenderHandler;
+import net.minecraft.entity.EntityLivingBase;
+import net.minecraftforge.client.event.RenderLivingEvent;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.fml.common.eventhandler.EventBus;
+
+public class Vampirism {
+
+	private static RenderHandler renderHandler;
+	static {
+		try {
+			Field listenersField = EventBus.class.getDeclaredField("listeners");
+			listenersField.setAccessible(true);
+			@SuppressWarnings("unchecked")
+			Enumeration<Object> keys = ((ConcurrentHashMap<Object, ?>) listenersField.get(MinecraftForge.EVENT_BUS)).keys();
+			while (keys.hasMoreElements()) {
+				Object key = keys.nextElement();
+				if (key instanceof RenderHandler) {
+					renderHandler = (RenderHandler) key;
+					break;
+				}
+			}
+			if (renderHandler == null) {
+				throw new NullPointerException();
+			}
+		} catch (Exception e) {
+			throw new UnsupportedOperationException("Failed to find de.teamlapen.vampirism.client.render.RenderHandler instance", e);
+		}
+	}
+
+	public static void onRenderLivingPost(EntityLivingBase entity) {
+		renderHandler.onRenderLivingPost(new RenderLivingEvent.Post<>(entity, null, 0.0F, 0.0D, 0.0D, 0.0D));
+	}
+
+}

src/main/java/meldexun/renderlib/renderer/entity/EntityRenderer.java

@@ -9,6 +9,7 @@
 import meldexun.renderlib.api.IEntityRendererCache;
 import meldexun.renderlib.api.ILoadable;
 import meldexun.renderlib.integration.FairyLights;
+import meldexun.renderlib.integration.Vampirism;
 import meldexun.renderlib.util.EntityUtil;
 import meldexun.renderlib.util.RenderUtil;
 import net.minecraft.client.Minecraft;
@@ -48,6 +49,9 @@ public void setup(ICamera frustum, float partialTicks, double camX, double camY,
 
 			if (this.isOcclusionCulled(entity)) {
 				this.occludedEntities++;
+				if (RenderLib.isVampirismInstalled && entity instanceof EntityLivingBase) {
+					Vampirism.onRenderLivingPost((EntityLivingBase) entity);
+				}
 			} else {
 				this.renderedEntities++;