Fix startup errors

src/main/java/com/minelittlepony/unicopia/client/BatEyesApplicator.java

@@ -20,6 +20,10 @@ public class BatEyesApplicator {
             return 0.6F;
         }
         return initial;
+        /*StatusEffectInstance statusEffectInstance = entity.getStatusEffect(StatusEffects.NIGHT_VISION);
+        return !statusEffectInstance.isDurationBelow(200)
+            ? 1.0F
+            : 0.7F + MathHelper.sin(((float)statusEffectInstance.getDuration() - tickDelta) * (float) Math.PI * 0.2F) * 0.3F;*/
     }
 
     public void enable() {

src/main/java/com/minelittlepony/unicopia/client/render/LeavesAdditionsModel.java

@@ -24,10 +24,12 @@ public final class LeavesAdditionsModel extends ForwardingBakedModel {
         ModelLoadingPlugin.register(ctx -> {
             ctx.modifyModelAfterBake().register(ModelModifier.WRAP_PHASE, (model, context) -> {
                 Identifier id = context.resourceId();
-                if (!id.getPath().endsWith("_flowering") || !(Registries.BLOCK.get(id.withPath(p -> p.replace("block/", "").replace("_flowering", ""))) instanceof FruitBearingBlock)) {
+                if (model == null || id == null
+                        || !id.getPath().endsWith("_flowering")
+                        || !(Registries.BLOCK.get(id.withPath(p -> p.replace("block/", "").replace("_flowering", ""))) instanceof FruitBearingBlock)) {
                     return model;
                 }
-                return model == null ? null : new LeavesAdditionsModel(model);
+                return new LeavesAdditionsModel(model);
             });
         });
     }

src/main/java/com/minelittlepony/unicopia/client/render/PolearmRenderer.java

@@ -41,7 +41,7 @@ public class PolearmRenderer implements DynamicItemRenderer, ClampedModelPredica
 
     static Identifier getModelId(ItemConvertible item) {
         Identifier id = Registries.ITEM.getId(item.asItem());
-        return id.withPath(p -> p + "_in_inventory");
+        return id.withPath(p -> "item/" + p + "_in_inventory");
     }
 
     public static TexturedModelData getTexturedModelData() {

src/main/java/com/minelittlepony/unicopia/client/render/shader/ViewportShader.java

@@ -16,6 +16,7 @@ import it.unimi.dsi.fastutil.objects.Object2FloatOpenHashMap;
 import net.fabricmc.fabric.api.resource.IdentifiableResourceReloadListener;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.gl.*;
+import net.minecraft.client.render.RenderTickCounter;
 import net.minecraft.resource.ResourceManager;
 import net.minecraft.resource.SynchronousResourceReloader;
 import net.minecraft.util.Identifier;
@@ -27,8 +28,8 @@ public class ViewportShader implements SynchronousResourceReloader, Identifiable
 
     public static final ViewportShader INSTANCE = new ViewportShader();
 
-    public static final Identifier CREEPER_SHADER = Identifier.ofVanilla("shaders/post/invert.json");
+    public static final Identifier CREEPER_SHADER = Identifier.ofVanilla("shaders/post/creeper.json");
-    public static final Identifier DESATURATION_SHADER = Identifier.ofVanilla("shaders/post/desaturate.json");
+    public static final Identifier DESATURATION_SHADER = Unicopia.id("shaders/post/desaturate.json");
 
     private final MinecraftClient client = MinecraftClient.getInstance();
 
@@ -70,7 +71,7 @@ public class ViewportShader implements SynchronousResourceReloader, Identifiable
         }
     }
 
-    public void render(float tickDelta) {
+    public void render(RenderTickCounter tickCounter) {
         if (Unicopia.getConfig().disableShaders.get()) {
             return;
         }
@@ -85,7 +86,7 @@ public class ViewportShader implements SynchronousResourceReloader, Identifiable
                 corruption = 1 - corruption + 0.05F;
 
                 shader.setUniformValue("color_convolve", "Saturation", corruption);
-                shader.render(tickDelta);
+                shader.render(tickCounter.getLastFrameDuration());
             }
         }
     }

src/main/java/com/minelittlepony/unicopia/container/SpellbookScreenHandler.java

@@ -348,8 +348,8 @@ public class SpellbookScreenHandler extends ScreenHandler {
             ItemStack current = slot.getStack();
 
             if (current.isEmpty() && slot.canInsert(stack)) {
-                if (stack.getCount() > slot.getMaxItemCount()) {
+                if (stack.getCount() > slot.getMaxItemCount(stack)) {
-                    slot.setStack(stack.split(slot.getMaxItemCount()));
+                    slot.setStack(stack.split(slot.getMaxItemCount(stack)));
                 } else {
                     slot.setStack(stack.split(stack.getCount()));
                 }

src/main/java/com/minelittlepony/unicopia/item/enchantment/UEnchantmentEffects.java

@@ -16,6 +16,6 @@ public interface UEnchantmentEffects {
     }
 
     private static void register(String name, MapCodec<? extends EnchantmentEntityEffect> codec) {
-        Registry.register(Registries.ENCHANTMENT_ENTITY_EFFECT_TYPE, Unicopia.id("name"), codec);
+        Registry.register(Registries.ENCHANTMENT_ENTITY_EFFECT_TYPE, Unicopia.id(name), codec);
     }
 }

src/main/java/com/minelittlepony/unicopia/item/enchantment/UEnchantments.java

@@ -4,7 +4,6 @@ import java.util.ArrayList;
 import java.util.List;
 import com.minelittlepony.unicopia.Unicopia;
 import net.minecraft.enchantment.Enchantment;
-import net.minecraft.registry.Registry;
 import net.minecraft.registry.RegistryKey;
 import net.minecraft.registry.RegistryKeys;
 
@@ -121,10 +120,6 @@ public interface UEnchantments {
         return key;
     }
 
-    static void register(Registry<Enchantment> registry, RegistryKey<Enchantment> key, Enchantment.Builder builder) {
-        Registry.register(registry, key, builder.build(key.getValue()));
-    }
-
     static void bootstrap() {
         UEnchantmentEffects.bootstrap();
     }

src/main/java/com/minelittlepony/unicopia/mixin/client/MixinGameRenderer.java

@@ -4,8 +4,6 @@ import org.spongepowered.asm.mixin.*;
 import org.spongepowered.asm.mixin.injection.*;
 import org.spongepowered.asm.mixin.injection.At.Shift;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-
 import com.llamalad7.mixinextras.injector.ModifyReturnValue;
 import com.minelittlepony.unicopia.client.BatEyesApplicator;
 import com.minelittlepony.unicopia.client.UnicopiaClient;
@@ -43,25 +41,19 @@ abstract class MixinGameRenderer implements AutoCloseable, SynchronousResourceRe
         }
     }
 
-    @Inject(method = "renderWorld",
+    @Inject(method = "renderWorld", at = @At("RETURN"))
-            at = @At("RETURN"))
     private void afterRenderWorld(RenderTickCounter counter, CallbackInfo info) {
         BatEyesApplicator.INSTANCE.disable();
     }
 
-    @ModifyReturnValue(method = "getNightVisionStrength(Lnet/minecraft/entity/LivingEntity;F)F", at = @At("RETURN"))
+    @ModifyReturnValue(method = "getNightVisionStrength", at = @At("RETURN"))
-    private static float modifyWorldBrightness(float initial, LivingEntity entity, float tickDelta, CallbackInfoReturnable<Float> info) {
+    private static float modifyNightVisionStrength(float initial, LivingEntity entity, float tickDelta) {
         return BatEyesApplicator.getWorldBrightness(initial, entity, tickDelta);
     }
 
-    @Inject(method = "render",
+    @Inject(method = "render", at = @At(value = "INVOKE", target = "net/minecraft/client/gl/Framebuffer.beginWrite(Z)V", shift = Shift.BEFORE))
-            at = @At(
+    private void onBeforeFrameEnd(RenderTickCounter tickCounter, boolean tick, CallbackInfo info) {
-                value = "INVOKE",
+        ViewportShader.INSTANCE.render(tickCounter);
-                target = "net/minecraft/client/gl/Framebuffer.beginWrite(Z)V",
-                shift = Shift.BEFORE)
-    )
-    private void onBeforeFrameEnd(float tickDelta, long startTime, boolean tick, CallbackInfo info) {
-        ViewportShader.INSTANCE.render(tickDelta);
     }
 
     @Inject(method = "onResized", at = @At("HEAD"))

src/main/java/com/minelittlepony/unicopia/mixin/trinkets/MixinScreenHandler.java

@@ -3,63 +3,19 @@ package com.minelittlepony.unicopia.mixin.trinkets;
 import org.jetbrains.annotations.Nullable;
 import org.spongepowered.asm.mixin.*;
 import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Redirect;
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
-
-import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
-
 import net.minecraft.item.ItemStack;
 import net.minecraft.screen.ScreenHandler;
 import net.minecraft.screen.slot.Slot;
-import net.minecraft.util.collection.DefaultedList;
 
 // fixed shift-clicking (handles other 10%)
 @Mixin(ScreenHandler.class)
 abstract class MixinScreenHandler {
-    @Nullable
+    @ModifyExpressionValue(
-    private Slot currentSlot;
+        method = "canInsertItemIntoSlot",
-
+        at = @At(value = "INVOKE", target = "Lnet/minecraft/item/ItemStack;getMaxCount()I")
-    @Redirect(method = "insertItem",
-            at = @At(
-                    value = "INVOKE",
-                    target = "Lnet/minecraft/util/collection/DefaultedList;get(I)Ljava/lang/Object;"
-            )
     )
-    // manual capture of the current slot since @Redirect doesn't support local captures
+    private static int modifyMaxCount(int maxCount, @Nullable Slot slot, ItemStack stack, boolean allowOverflow) {
-    private Object onGetSlot(DefaultedList<Slot> sender, int index) {
+        return slot.getMaxItemCount(stack);
-        currentSlot = sender.get(index);
-        return currentSlot;
-    }
-
-    @Redirect(method = "insertItem",
-            at = @At(
-                    value = "INVOKE",
-                    target = "Lnet/minecraft/screen/slot/Slot;getMaxItemCount()I"
-            )
-    )
-    // redirect slot.getMaxItemCount() to stack aware version
-    protected int onGetMaxItemCount(Slot sender, ItemStack stack) {
-        return TrinketsDelegate.getInstance(null).isTrinketSlot(sender) ? sender.getMaxItemCount(stack) : sender.getMaxItemCount();
-    }
-
-    @Redirect(method = "insertItem",
-            at = @At(
-                    value = "INVOKE",
-                    target = "Lnet/minecraft/item/ItemStack;isEmpty()Z",
-                    ordinal = 1
-            )
-    )
-    // redirect "if (!itemStack.isEmpty() && ItemStack.canCombine(stack, itemStack))" -> "if (!canNotInsert(itemStack, slot) && ItemStack.canCombine(stack, itemStack))"
-    protected boolean canNotInsert(ItemStack sender) {
-        return sender.isEmpty() || (TrinketsDelegate.getInstance(null).isTrinketSlot(currentSlot) && (currentSlot.getStack().getCount() + sender.getCount()) <= currentSlot.getMaxItemCount(sender));
-    }
-
-    @Redirect(method = "canInsertItemIntoSlot",
-            at = @At(
-                    value = "INVOKE",
-                    target = "Lnet/minecraft/item/ItemStack;getMaxCount()I"
-            )
-    )
-    private static int onGetMaxCount(ItemStack sender, @Nullable Slot slot) {
-        return TrinketsDelegate.getInstance(null).isTrinketSlot(slot) ? slot.getMaxItemCount(sender) : sender.getMaxCount();
     }
 }

src/main/java/com/minelittlepony/unicopia/mixin/trinkets/MixinTrinketInventory.java

@@ -16,7 +16,6 @@ abstract class MixinTrinketInventory implements Inventory {
         ItemStack existingStack = getStack(slot);
         SlotReference ref = new SlotReference((TrinketInventory)(Object)this, slot);
 
-
         int max = Math.min(
                 existingStack.isEmpty() ? 64 : TrinketsDelegateImpl.getMaxCount(existingStack, ref, existingStack.getMaxCount()),
                 stack.isEmpty() ? 64 : TrinketsDelegateImpl.getMaxCount(stack, ref, stack.getMaxCount())

src/main/resources/assets/unicopia/shaders/post/desaturate.json

@@ -0,0 +1,23 @@
+{
+    "targets": [
+        "swap"
+    ],
+    "passes": [
+        {
+            "name": "color_convolve",
+            "intarget": "minecraft:main",
+            "outtarget": "swap",
+            "uniforms": [
+                {
+                    "name": "Saturation",
+                    "values": [ 0.2 ]
+                }
+            ]
+        },
+        {
+            "name": "blit",
+            "intarget": "swap",
+            "outtarget": "minecraft:main"
+        }
+    ]
+}