perf: SpecialItemModel cache

src/main/java/betterblockentities/mixin/minecraft/SpecialItemModelMixin.java

@@ -0,0 +1,39 @@
+package betterblockentities.mixin.minecraft;
+
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
+import net.minecraft.client.render.item.ItemRenderState;
+import net.minecraft.client.render.item.model.SpecialItemModel;
+import net.minecraft.client.render.item.model.special.SpecialModelRenderer;
+import org.joml.Vector3f;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.util.Set;
+import java.util.function.Supplier;
+
+@Mixin(SpecialItemModel.class)
+public class SpecialItemModelMixin<T> {
+
+    @Shadow
+    @Final
+    private SpecialModelRenderer<T> specialModelType;
+
+    @Unique
+    private Vector3f[] cachedVertices;
+
+    @Redirect(method = "update", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/render/item/ItemRenderState$LayerRenderState;setVertices(Ljava/util/function/Supplier;)V"))
+    private void cacheSetVertices(ItemRenderState.LayerRenderState instance, Supplier<Vector3f[]> originalSupplier) {
+        instance.setVertices(() -> {
+            if (this.cachedVertices == null) {
+                Set<Vector3f> set = new ObjectOpenHashSet<>();
+                this.specialModelType.collectVertices(set);
+                this.cachedVertices = set.toArray(new Vector3f[0]);
+            }
+            return this.cachedVertices;
+        });
+    }
+}

src/main/resources/betterblockentities.mixins.json

@@ -4,30 +4,25 @@
   "compatibilityLevel": "JAVA_21",
   "mixins": [
     "minecraft.bell.BellBlockEntityMixin",
-
     "minecraft.chest.ChestBlockEntityAccessor",
     "minecraft.chest.ChestBlockEntityMixin",
     "minecraft.chest.ChestBlockEntityRendererMixin",
     "minecraft.chest.ChestLidAnimatorAccessor",
     "minecraft.chest.EnderChestBlockEntityMixin",
-
     "minecraft.decordatedpot.DecoratedPotBlockEntityMixin",
-
     "minecraft.shulker.ShulkerBoxBlockEntityMixin",
-
     "minecraft.sign.AbstractSignBlockEntityRendererMixin",
-
     "sodium.AbstractBlockRenderContextAccessor",
     "sodium.BlockRendererMixin",
     "sodium.SodiumWorldRendererMixin",
-
     "minecraft.AbstractBlockMixin",
     "minecraft.BlockEntityMixin",
     "minecraft.ClientWorldMixin",
     "minecraft.OrderedRenderCommandQueueImplMixin",
     "minecraft.RenderLayersMixin",
     "minecraft.ResourcePackManagerMixin",
-    "minecraft.WorldRendererMixin"
+    "minecraft.WorldRendererMixin",
+    "minecraft.SpecialItemModelMixin"
   ],
   "server": [],
   "injectors": {