flying in end gateways in cretiveNoClip won't teleport. fixes #943

src/main/java/carpet/CarpetSettings.java

@@ -10,6 +10,8 @@ import carpet.utils.Messenger;
 import carpet.utils.SpawnChunks;
 import net.minecraft.block.Block;
 import net.minecraft.block.Blocks;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.command.ServerCommandSource;
 import net.minecraft.server.dedicated.DedicatedServer;
@@ -803,6 +805,11 @@ public class CarpetSettings
             category = {CREATIVE, CLIENT}
     )
     public static boolean creativeNoClip = false;
+    public static boolean isCreativeFlying(Entity entity)
+    {
+        // #todo replace after merger to 1.17
+        return CarpetSettings.creativeNoClip && entity instanceof PlayerEntity && (((PlayerEntity) entity).isCreative()) && ((PlayerEntity) entity).abilities.flying;
+    }
 
 
     @Rule(

src/main/java/carpet/mixins/EndGatewayBlockEntity_creativeNoClipMixin.java

@@ -0,0 +1,19 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.block.entity.EndGatewayBlockEntity;
+import net.minecraft.entity.Entity;
+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.CallbackInfoReturnable;
+
+@Mixin(EndGatewayBlockEntity.class)
+public class EndGatewayBlockEntity_creativeNoClipMixin
+{
+    @Inject(method = "method_30276", cancellable = true, at = @At("HEAD"))
+    private static void checkFlyingCreative(Entity entity, CallbackInfoReturnable<Boolean> cir)
+    {
+        if (CarpetSettings.isCreativeFlying(entity)) cir.setReturnValue(false);
+    }
+}