Overridden overrides

- Only instance items if their *base* baked model has no overrides
- ItemRenderer#getModel applies overrides internally, so we have to go
  directly to the ItemModelShaper
- Don't filter the results of ClientLevel#entitiesForRendering, instead
  do an early exit in LevelRenderer#renderEntity
  - Avoids allocating a potentially massive list
  - Only need to loop over the entity list once
  - Visible entity counter is fixed
  - Would be nice to continue out of an iteration to avoid other
    unnecessary checks in the render loop, but I don't think there's a
    way to do that with mixin
- Use a persistent rotation quat in InstanceTree to avoid allocations
- Only call setChanged when updating instances in CowVisual, saves a ton
  of atomic overhead

src/main/java/com/jozufozu/flywheel/impl/mixin/ClientLevelMixin.java

@@ -1,32 +0,0 @@
-package com.jozufozu.flywheel.impl.mixin;
-
-import java.util.ArrayList;
-
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-
-import com.google.common.collect.Lists;
-import com.jozufozu.flywheel.api.visualization.VisualizationManager;
-import com.jozufozu.flywheel.impl.visualization.VisualizationHelper;
-
-import net.minecraft.client.multiplayer.ClientLevel;
-import net.minecraft.world.entity.Entity;
-
-@Mixin(ClientLevel.class)
-abstract class ClientLevelMixin  {
-	@Inject(method = "entitiesForRendering()Ljava/lang/Iterable;", at = @At("RETURN"), cancellable = true)
-	private void flywheel$filterEntities(CallbackInfoReturnable<Iterable<Entity>> cir) {
-		if (!VisualizationManager.supportsVisualization((ClientLevel) (Object) this)) {
-			return;
-		}
-
-		Iterable<Entity> entities = cir.getReturnValue();
-		ArrayList<Entity> filtered = Lists.newArrayList(entities);
-
-		filtered.removeIf(VisualizationHelper::shouldSkipRender);
-
-		cir.setReturnValue(filtered);
-	}
-}

src/main/java/com/jozufozu/flywheel/impl/mixin/LevelRendererMixin.java

@@ -18,7 +18,9 @@ import com.jozufozu.flywheel.api.event.BeginFrameEvent;
 import com.jozufozu.flywheel.api.event.ReloadLevelRendererEvent;
 import com.jozufozu.flywheel.api.event.RenderStage;
 import com.jozufozu.flywheel.api.event.RenderStageEvent;
+import com.jozufozu.flywheel.api.visualization.VisualizationManager;
 import com.jozufozu.flywheel.impl.event.RenderContextImpl;
+import com.jozufozu.flywheel.impl.visualization.VisualizationHelper;
 import com.jozufozu.flywheel.impl.visualization.VisualizationManagerImpl;
 import com.mojang.blaze3d.vertex.PoseStack;
 
@@ -28,8 +30,10 @@ import net.minecraft.client.multiplayer.ClientLevel;
 import net.minecraft.client.renderer.GameRenderer;
 import net.minecraft.client.renderer.LevelRenderer;
 import net.minecraft.client.renderer.LightTexture;
+import net.minecraft.client.renderer.MultiBufferSource;
 import net.minecraft.client.renderer.RenderBuffers;
 import net.minecraft.server.level.BlockDestructionProgress;
+import net.minecraft.world.entity.Entity;
 import net.minecraftforge.common.MinecraftForge;
 
 @Mixin(value = LevelRenderer.class, priority = 1001) // Higher priority to go after Sodium
@@ -79,6 +83,14 @@ abstract class LevelRendererMixin {
 		}
 	}
 
+	// ENTITY CANCELLING
+	@Inject(method = "renderEntity", at = @At("HEAD"), cancellable = true)
+	private void flywheel$decideNotToRenderEntity(Entity pEntity, double pCamX, double pCamY, double pCamZ, float pPartialTick, PoseStack pPoseStack, MultiBufferSource pBufferSource, CallbackInfo ci) {
+		if (VisualizationManager.supportsVisualization(pEntity.level()) && VisualizationHelper.shouldSkipRender(pEntity)) {
+			ci.cancel();
+		}
+	}
+
 	// STAGE DISPATCHING
 
 	@Unique

src/main/java/com/jozufozu/flywheel/lib/model/part/InstanceTree.java

@@ -39,6 +39,7 @@ public class InstanceTree {
 	@Nullable
 	public TransformedInstance instance;
 
+	private final Quaternionf rotation = new Quaternionf();
 	private final Entry entry;
 	private final PartPose initialPose;
 
@@ -136,7 +137,7 @@ public class InstanceTree {
 		void accept(T t, int i, int j);
 	}
 
-	public void render(PoseStack pPoseStack) {
+	public void updateInstances(PoseStack pPoseStack) {
 		if (this.visible) {
 			pPoseStack.pushPose();
 			this.translateAndRotate(pPoseStack);
@@ -146,7 +147,7 @@ public class InstanceTree {
 			}
 
 			for (InstanceTree modelpart : this.children.values()) {
-				modelpart.render(pPoseStack);
+				modelpart.updateInstances(pPoseStack);
 			}
 
 			pPoseStack.popPose();
@@ -156,7 +157,7 @@ public class InstanceTree {
 	public void translateAndRotate(PoseStack pPoseStack) {
 		pPoseStack.translate(this.x / 16.0F, this.y / 16.0F, this.z / 16.0F);
 		if (this.xRot != 0.0F || this.yRot != 0.0F || this.zRot != 0.0F) {
-			pPoseStack.mulPose((new Quaternionf()).rotationZYX(this.zRot, this.yRot, this.xRot));
+			pPoseStack.mulPose(rotation.rotationZYX(this.zRot, this.yRot, this.xRot));
 		}
 
 		if (this.xScale != 1.0F || this.yScale != 1.0F || this.zScale != 1.0F) {

src/main/java/com/jozufozu/flywheel/vanilla/AgeableListComponent.java

@@ -22,24 +22,24 @@ public abstract class AgeableListComponent {
 			}
 
 			pPoseStack.translate(0.0F, this.config.babyYHeadOffset / 16.0F, this.config.babyZHeadOffset / 16.0F);
-			for (InstanceTree p_102081_ : this.headParts()) {
+			for (InstanceTree headPart : this.headParts()) {
-				p_102081_.render(pPoseStack);
+				headPart.updateInstances(pPoseStack);
 			}
 			pPoseStack.popPose();
 			pPoseStack.pushPose();
 			float f1 = 1.0F / this.config.babyBodyScale;
 			pPoseStack.scale(f1, f1, f1);
 			pPoseStack.translate(0.0F, this.config.bodyYOffset / 16.0F, 0.0F);
-			for (InstanceTree p_102071_ : this.bodyParts()) {
+			for (InstanceTree bodyPart : this.bodyParts()) {
-				p_102071_.render(pPoseStack);
+				bodyPart.updateInstances(pPoseStack);
 			}
 			pPoseStack.popPose();
 		} else {
-			for (InstanceTree p_102061_ : this.headParts()) {
+			for (InstanceTree headPart : this.headParts()) {
-				p_102061_.render(pPoseStack);
+				headPart.updateInstances(pPoseStack);
 			}
-			for (InstanceTree p_102051_ : this.bodyParts()) {
+			for (InstanceTree bodyPart : this.bodyParts()) {
-				p_102051_.render(pPoseStack);
+				bodyPart.updateInstances(pPoseStack);
 			}
 		}
 

src/main/java/com/jozufozu/flywheel/vanilla/CowVisual.java

@@ -65,7 +65,7 @@ public class CowVisual extends SimpleEntityVisual<Cow> {
 		cowQuadrupedComponent.root.walkInstances(overlay, light, (i, o, l) -> {
 			i.setOverlay(o);
 			i.light(l);
-			i.setChanged();
+			// We'll #setChanged in the
 		});
 
 		stack.setIdentity();

src/main/java/com/jozufozu/flywheel/vanilla/ItemVisual.java

@@ -18,6 +18,7 @@ import com.mojang.math.Axis;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.LightTexture;
+import net.minecraft.client.renderer.block.model.ItemOverrides;
 import net.minecraft.client.resources.model.BakedModel;
 import net.minecraft.client.resources.model.MultiPartBakedModel;
 import net.minecraft.client.resources.model.SimpleBakedModel;
@@ -48,9 +49,7 @@ public class ItemVisual extends SimpleEntityVisual<ItemEntity> {
 		super(ctx, entity);
 
 		var item = entity.getItem();
-		model = Minecraft.getInstance()
+		model = getModel(item);
-				.getItemRenderer()
-				.getModel(item, entity.level(), null, entity.getId());
 
 		isSupported = isSupported(model);
 
@@ -61,11 +60,14 @@ public class ItemVisual extends SimpleEntityVisual<ItemEntity> {
 	}
 
 	public static boolean isSupported(ItemEntity entity) {
-		var model = Minecraft.getInstance()
+		return isSupported(getModel(entity.getItem()));
-				.getItemRenderer()
+	}
-				.getModel(entity.getItem(), entity.level(), null, entity.getId());
 
-		return isSupported(model);
+	public static BakedModel getModel(ItemStack stack) {
+		return Minecraft.getInstance()
+				.getItemRenderer()
+				.getItemModelShaper()
+				.getItemModel(stack);
 	}
 
 	public static boolean isSupported(BakedModel model) {
@@ -73,9 +75,7 @@ public class ItemVisual extends SimpleEntityVisual<ItemEntity> {
 			return false;
 		}
 
-		if (!model.getOverrides()
+		if (model.getOverrides() != ItemOverrides.EMPTY) {
-				.getOverrides()
-				.isEmpty()) {
 			return false;
 		}
 
@@ -110,7 +110,6 @@ public class ItemVisual extends SimpleEntityVisual<ItemEntity> {
 				.translate(getVisualPosition(ctx.partialTick()));
 
 		instances.resetCount();
-		pPoseStack.pushPose();
 		ItemStack itemstack = entity.getItem();
 		int i = itemstack.isEmpty() ? 187 : Item.getId(itemstack.getItem()) + itemstack.getDamageValue();
 		var random = RANDOM.get();
@@ -158,7 +157,6 @@ public class ItemVisual extends SimpleEntityVisual<ItemEntity> {
 			}
 		}
 
-		pPoseStack.popPose();
 		instances.discardExtra();
 	}
 
@@ -199,7 +197,6 @@ public class ItemVisual extends SimpleEntityVisual<ItemEntity> {
 	}
 
 	public record ItemKey(ItemStack stack, BakedModel model) {
-
 		@Override
 		public boolean equals(Object o) {
 			if (this == o) {

src/main/resources/flywheel.impl.mixins.json

@@ -7,7 +7,6 @@
   "client": [
     "BlockEntityTypeMixin",
     "ClientChunkCacheMixin",
-    "ClientLevelMixin",
     "EntityTypeMixin",
     "LevelMixin",
     "LevelRendererMixin",