feat(mixin): mixin projectile to get shotting position

src/main/java/org/auioc/mcmod/arnicalib/api/mixin/common/IMixinProjectile.java

@@ -0,0 +1,7 @@
+package org.auioc.mcmod.arnicalib.api.mixin.common;
+
+import org.auioc.mcmod.arnicalib.api.game.entity.IHProjectile;
+
+public interface IMixinProjectile extends IHProjectile {
+
+}

src/main/java/org/auioc/mcmod/arnicalib/mixin/common/MixinProjectile.java

@@ -0,0 +1,65 @@
+package org.auioc.mcmod.arnicalib.mixin.common;
+
+import javax.annotation.Nullable;
+import org.auioc.mcmod.arnicalib.api.mixin.common.IMixinProjectile;
+import org.auioc.mcmod.arnicalib.utils.game.NbtUtils;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.entity.projectile.Projectile;
+import net.minecraft.world.phys.Vec3;
+
+@Mixin(value = Projectile.class)
+public class MixinProjectile implements IMixinProjectile {
+
+    @Nullable
+    private Vec3 shootingPosition;
+
+    @Nullable
+    @Override
+    public Vec3 getShootingPosition() {
+        return this.shootingPosition;
+    }
+
+    @Inject(
+        method = "Lnet/minecraft/world/entity/projectile/Projectile;tick()V",
+        at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/world/entity/projectile/Projectile;gameEvent(Lnet/minecraft/world/level/gameevent/GameEvent;Lnet/minecraft/world/entity/Entity;Lnet/minecraft/core/BlockPos;)V",
+            ordinal = 0
+        ),
+        require = 1,
+        allow = 1
+    )
+    private void tick(CallbackInfo ci) {
+        var pos = ((Projectile) (Object) this).position();
+        this.shootingPosition = new Vec3(pos.x, pos.y, pos.z);
+    }
+
+    @Inject(
+        method = "Lnet/minecraft/world/entity/projectile/Projectile;readAdditionalSaveData(Lnet/minecraft/nbt/CompoundTag;)V",
+        at = @At(value = "TAIL"),
+        require = 1,
+        allow = 1
+    )
+    private void readAdditionalSaveData(CompoundTag p_37262_, CallbackInfo ci) {
+        if (p_37262_.contains("ShootingPosition", 6)) {
+            this.shootingPosition = NbtUtils.readVec3(p_37262_.getList("ShootingPosition", 6));
+        }
+    }
+
+    @Inject(
+        method = "Lnet/minecraft/world/entity/projectile/Projectile;addAdditionalSaveData(Lnet/minecraft/nbt/CompoundTag;)V",
+        at = @At(value = "TAIL"),
+        require = 1,
+        allow = 1
+    )
+    private void addAdditionalSaveData(CompoundTag p_37265_, CallbackInfo ci) {
+        if (this.shootingPosition != null) {
+            p_37265_.put("ShootingPosition", NbtUtils.writeVec3(this.shootingPosition));
+        }
+    }
+
+}

src/main/resources/arnicalib.mixin.json

@@ -8,6 +8,7 @@
         "common.MixinCommandSourceStack",
         "common.MixinCreativeModeTab",
         "common.MixinItemStack",
+        "common.MixinProjectile",
         "common.MixinArrow",
         "server.MixinServerLifecycleHooks",
         "server.MixinLootContext",