add(relevant mixins + interfaces for animation)

src/main/java/elocindev/shield_overhaul/mixin/ClientPlayerEntityMixin.java

@@ -0,0 +1,44 @@
+package elocindev.shield_overhaul.mixin;
+
+
+import com.mojang.authlib.GameProfile;
+import dev.kosmx.playerAnim.api.layered.IAnimation;
+import dev.kosmx.playerAnim.api.layered.ModifierLayer;
+import dev.kosmx.playerAnim.minecraftApi.PlayerAnimationAccess;
+import elocindev.shield_overhaul.util.IShieldAnimatedPlayer;
+import net.minecraft.client.network.AbstractClientPlayerEntity;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.network.encryption.PlayerPublicKey;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(AbstractClientPlayerEntity.class)
+public class ClientPlayerEntityMixin implements IShieldAnimatedPlayer {
+
+    //Unique annotation will rename private methods/fields if needed to avoid collisions.
+    @Unique
+    private final ModifierLayer<IAnimation> modAnimationContainer = new ModifierLayer<>();
+
+    /**
+     * Add the animation registration to the end of the constructor
+     * Or you can use {@link dev.kosmx.playerAnim.minecraftApi.PlayerAnimationAccess#REGISTER_ANIMATION_EVENT} event for this
+     */
+    @Inject(method = "<init>", at = @At(value = "RETURN"))
+    private void init(ClientWorld world, GameProfile profile, PlayerPublicKey publicKey, CallbackInfo ci) {
+        //Mixin does not know (yet) that this will be merged with AbstractClientPlayerEntity
+        PlayerAnimationAccess.getPlayerAnimLayer((AbstractClientPlayerEntity) (Object)this).addAnimLayer(1000, modAnimationContainer); //Register the layer with a priority
+        //The priority will tell, how important is this animation compared to other mods. Higher number means higher priority
+        //Mods with higher priority will override the lower priority mods (if they want to animation anything)
+    }
+
+    /**
+     * Override the interface function, so we can use it in the future
+     */
+    @Override
+    public ModifierLayer<IAnimation> shield_overhaul_getModAnimation() {
+        return modAnimationContainer;
+    }
+}

src/main/java/elocindev/shield_overhaul/util/IShieldAnimatedPlayer.java

@@ -0,0 +1,8 @@
+package elocindev.shield_overhaul.util;
+
+import dev.kosmx.playerAnim.api.layered.IAnimation;
+import dev.kosmx.playerAnim.api.layered.ModifierLayer;
+
+public interface IShieldAnimatedPlayer {
+    ModifierLayer<IAnimation> shield_overhaul_getModAnimation();
+}

src/main/resources/shield_overhaul.mixins.json

@@ -5,7 +5,8 @@
   "compatibilityLevel": "JAVA_17",
   "mixins": [
     "ServerPlayerMixin",
-    "BackgroundRendererMixin"
+    "BackgroundRendererMixin",
+    "ClientPlayerEntityMixin"
   ],
   "injectors": {
     "defaultRequire": 1