From e8a1e084a24db5fdf1dee9976bacc4766618fa2b Mon Sep 17 00:00:00 2001
From: lowercasebtw <jejojora2@gmail.com>
Date: Thu, 12 Dec 2024 21:37:09 -0500
Subject: [PATCH] Add setting to fix arm swing mirroring

---
 .../animatium/config/AnimatiumConfig.java     |  3 +++
 .../mixins/MixinBipedEntityModel.java         | 22 +++++++++++++++++++
 .../assets/animatium/lang/en_us.json          |  2 ++
 3 files changed, 27 insertions(+)

diff --git a/src/main/java/me/mixces/animatium/config/AnimatiumConfig.java b/src/main/java/me/mixces/animatium/config/AnimatiumConfig.java
index 5a0b2a0..aa26d90 100644
--- a/src/main/java/me/mixces/animatium/config/AnimatiumConfig.java
+++ b/src/main/java/me/mixces/animatium/config/AnimatiumConfig.java
@@ -70,6 +70,9 @@ public class AnimatiumConfig extends MidnightConfig {
     // TODO/NOTE: Currently not accurate/broken
     public static boolean oldCapeMovement = false; // Changes the cape model movement to be how it used to be
 
+    @Entry
+    public static boolean fixMirrorArmSwing = false; // Fixes arm swing mirroring
+
     @Entry
     public static CameraVersion cameraVersion = CameraVersion.v1_8; // Change the camera position to be as it was in said version range
 
diff --git a/src/main/java/me/mixces/animatium/mixins/MixinBipedEntityModel.java b/src/main/java/me/mixces/animatium/mixins/MixinBipedEntityModel.java
index f400a87..d603986 100644
--- a/src/main/java/me/mixces/animatium/mixins/MixinBipedEntityModel.java
+++ b/src/main/java/me/mixces/animatium/mixins/MixinBipedEntityModel.java
@@ -1,14 +1,18 @@
 package me.mixces.animatium.mixins;
 
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import com.llamalad7.mixinextras.sugar.Local;
 import me.mixces.animatium.config.AnimatiumConfig;
 import net.minecraft.client.model.ModelPart;
 import net.minecraft.client.render.RenderLayer;
 import net.minecraft.client.render.entity.model.BipedEntityModel;
 import net.minecraft.client.render.entity.model.EntityModel;
 import net.minecraft.client.render.entity.state.BipedEntityRenderState;
+import net.minecraft.util.Arm;
 import net.minecraft.util.Identifier;
+import org.objectweb.asm.Opcodes;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -71,4 +75,22 @@ protected MixinBipedEntityModel(ModelPart modelPart, Function<Identifier, Render
             }
         }
     }
+
+    @WrapOperation(method = "animateArms", at = @At(value = "FIELD", target = "Lnet/minecraft/client/render/entity/model/BipedEntityModel;leftArm:Lnet/minecraft/client/model/ModelPart;", opcode = Opcodes.GETFIELD, ordinal = 3))
+    public ModelPart animatium$fixMirrorArmSwing$field(BipedEntityModel<?> instance, Operation<ModelPart> original, @Local ModelPart modelPart) {
+        if (AnimatiumConfig.fixMirrorArmSwing) {
+            return modelPart;
+        } else {
+            return original.call(instance);
+        }
+    }
+
+    @ModifyExpressionValue(method = "animateArms", at = @At(value = "INVOKE", target = "Lnet/minecraft/util/math/MathHelper;sin(F)F", ordinal = 5))
+    public float animatium$fixMirrorArmSwing$sin(float original, @Local Arm arm) {
+        if (AnimatiumConfig.fixMirrorArmSwing) {
+            return (arm == Arm.LEFT ? -1 : 1) * original;
+        } else {
+            return original;
+        }
+    }
 }
diff --git a/src/main/resources/assets/animatium/lang/en_us.json b/src/main/resources/assets/animatium/lang/en_us.json
index 6766340..cce39ac 100644
--- a/src/main/resources/assets/animatium/lang/en_us.json
+++ b/src/main/resources/assets/animatium/lang/en_us.json
@@ -45,6 +45,8 @@
 	"animatium.midnightconfig.fixBowArmMovement.tooltip": "TODO",
 	"animatium.midnightconfig.oldCapeMovement": "Old cape model movement",
 	"animatium.midnightconfig.oldCapeMovement.tooltip": "TODO",
+	"animatium.midnightconfig.fixMirrorArmSwing": "Fix arm swing mirroring",
+	"animatium.midnightconfig.fixMirrorArmSwing.tooltip": "TODO",
 	"animatium.midnightconfig.cameraVersion": "Change camera position to be as it was in",
 	"animatium.midnightconfig.cameraVersion.tooltip": "TODO",