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From HalfLife 2 Knowledge Base

By: expert

Scanner carrying a mine

Description

This tutorial will explain how to spawn a scanner, make it follow a set path, and drop a mine at a point on its path.

Note: If you want shield scanners in your map instead of regular scanners, the name of your map must begin with "d3_c17_".

Setting up the Scanner

Step 1. First we will need to make our scanner. Create a npc_cscanner and name it pathscanner_1_scanner. Make sure Should inspect is set to No. Now check the flag Template NPC.

Step 2. Next make a npc_template_maker near your scanner and name it pathscanner_1_scanner_maker. Make sure Start Disabled is set to Yes. Enter the name of your npc_cscanner (pathscanner_1_scanner) for the Name of template NPC. Add the following outputs:

       OnSpawnNPC pathscanner_1_scanner        InputSetFlightSpeed 300 0.00 No
       OnSpawnNPC pathscanner_1_scanner_aiss_1 StartSchedule           0.00 No 
       OnSpawnNPC pathscanner_1_scanner        EquipMine               0.00 No

Note: We will be making pathscanner_1_scanner_aiss_1 in the next step.

Step 3. Make an aiscripted_schedule near your scanner and name it pathscanner_1_scanner_aiss_1. Enter the name of your scanner (pathscanner_1_scanner) for Target NPC. For Schedule to run, select Run Goal Path. Change Interruptability to Death. For Goal entity, put pathscanner_1_path_1. We will be making this entity later.

Making the Scanner's Path

Step 4. Now we will make the scanner's path. Create a path_corner near your scanner and name it pathscanner_1_path_1. Now hold shift and drag this path_corner to where you want the next point in your scanner's path. Finish setting up your scanner's path.

Step 5. Click on the path_corner you want your scanner to drop its mine at (Not the last in its path), and add the following outputs:

       OnPass pathscanner_1_scanner        DeployMine    0.00 No
       OnPass pathscanner_1_scanner_aiss_2 StartSchedule 0.20 No

Note: We will be making pathscanner_1_scanner_aiss_2 in the next step.

Step 6. Make another aiscripted_schedule near your scanner and name it pathscanner_1_scanner_aiss_2. Enter the name of your scanner (pathscanner_1_scanner) for Target NPC. For Schedule to run, select Run Goal Path. Change Interruptability to Death. For Goal entity, put the name of the path_corner you chose in Step 5.

Step 7. (Optional) Now click on the last path_corner in your scanner's path and add the following output:

       OnPass pathscanner_1_scanner Kill 0.00 No

Triggering the Scanner

Step 8. Finally, we will need to trigger the npc_template_maker. For this, I will use a logic_auto. Make a logic_auto somewhere in your map, and give it the following output:

       OnMapSpawn pathscanner_1_scanner_maker Spawn 0.10 No

Note: You can use anything you want to trigger this, but for this tutorial I used a logic_auto.

Credit to VALVe for this tutorial - I didn't figure this out myself.

Note: If you put your path_corners too far apart, you may need to put info_node_air entities between them so the scanner can find its way between the two points.