fix cape with balloon cart holding anim

src/main/java/one/devos/nautical/up_and_away/framework/ext/HumanoidModelExt.java

@@ -0,0 +1,5 @@
+package one.devos.nautical.up_and_away.framework.ext;
+
+public interface HumanoidModelExt {
+	boolean up_and_away$holdingBalloonCart();
+}

src/main/java/one/devos/nautical/up_and_away/mixin/client/CapeLayerMixin.java

@@ -0,0 +1,33 @@
+package one.devos.nautical.up_and_away.mixin.client;
+
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
+
+import net.minecraft.client.model.PlayerModel;
+import net.minecraft.client.player.AbstractClientPlayer;
+import net.minecraft.client.renderer.entity.RenderLayerParent;
+import net.minecraft.client.renderer.entity.layers.CapeLayer;
+
+import net.minecraft.client.renderer.entity.layers.RenderLayer;
+
+import one.devos.nautical.up_and_away.framework.ext.HumanoidModelExt;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+
+@Mixin(CapeLayer.class)
+public abstract class CapeLayerMixin extends RenderLayer<AbstractClientPlayer, PlayerModel<AbstractClientPlayer>> {
+	private CapeLayerMixin(RenderLayerParent<AbstractClientPlayer, PlayerModel<AbstractClientPlayer>> context) {
+		super(context);
+	}
+
+	@ModifyExpressionValue(
+			method = "render(Lcom/mojang/blaze3d/vertex/PoseStack;Lnet/minecraft/client/renderer/MultiBufferSource;ILnet/minecraft/client/player/AbstractClientPlayer;FFFFFF)V",
+			at = @At(
+					value = "INVOKE",
+					target = "Lnet/minecraft/client/player/AbstractClientPlayer;isCrouching()Z"
+			)
+	)
+	private boolean balloonCartExtraCrouch(boolean original) {
+		return original || ((HumanoidModelExt) this.getParentModel()).up_and_away$holdingBalloonCart();
+	}
+}

src/main/java/one/devos/nautical/up_and_away/mixin/client/HumanoidModelMixin.java

@@ -10,6 +10,8 @@
 
 import one.devos.nautical.up_and_away.content.UpAndAwayItems;
 
+import one.devos.nautical.up_and_away.framework.ext.HumanoidModelExt;
+
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -19,7 +21,7 @@
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(HumanoidModel.class)
-public class HumanoidModelMixin {
+public class HumanoidModelMixin implements HumanoidModelExt {
 	@Shadow
 	@Final
 	public ModelPart rightArm;
@@ -34,6 +36,11 @@ public class HumanoidModelMixin {
 	@Unique
 	private boolean holdingBalloonCart;
 
+	@Override
+	public boolean up_and_away$holdingBalloonCart() {
+		return this.holdingBalloonCart;
+	}
+
 	@Inject(method = "setupAnim(Lnet/minecraft/world/entity/LivingEntity;FFFFF)V", at = @At("HEAD"))
 	private void balloonCartHoldingAnim(
 			LivingEntity entity,

src/main/resources/up_and_away.mixins.json

@@ -13,6 +13,7 @@
     "ShulkerBulletAccessor"
   ],
   "client": [
+    "client.CapeLayerMixin",
     "client.HumanoidModelMixin",
     "client.ItemInHandLayerMixin",
     "client.ItemInHandRendererMixin"