You need to use a Site actor which the Action actor uses as the launch site. Site actors cannot be moved using the local offset sop so you need to make a hidden model attachment at the offset with the site attached to it.
Do not forget the force launch site flag on the action actor.
Many, but not all unit models have attachment points on their left arms that allow you to launch missiles from there. Which unit model are you using? Right-click on the Unit in the Data Editor and go to Preview Unit. In the previewer, go to the Render menu, Show Geometry, and check Attachment Points. Then, mid-right there is a list of elements inside the model, and a folder for Attachment Points. Open it up and click on each attachment point, and it will highlight it in the preview. Figure out the name of the left arm attachment point (most often Weapon Left, but it can also be Weapon 01).
Then, in your Action actor, go to Launch Attachment Query, and change the Method to "Filter WeaponLeft (AMFilterWeaponLeft)," if that is the attachment point, or "Filter Weapon 01" if that it is, etc. If your attachment point is not present, you will have to create an Attachment Method, but it is unlikely that that will be the case.
how to make a unit launch a missile from left arm(or just left side) by using mover or something?
You need to use a Site actor which the Action actor uses as the launch site. Site actors cannot be moved using the local offset sop so you need to make a hidden model attachment at the offset with the site attached to it.
Do not forget the force launch site flag on the action actor.
Contribute to the wiki (Wiki button at top of page) Considered easy altering of the unit textures?
https://www.sc2mapster.com/forums/resources/tutorials/179654-data-actor-events-message-texture-select-by-id
https://media.forgecdn.net/attachments/187/40/Screenshot2011-04-17_09_16_21.jpg
@strhsxx: Go
Many, but not all unit models have attachment points on their left arms that allow you to launch missiles from there. Which unit model are you using? Right-click on the Unit in the Data Editor and go to Preview Unit. In the previewer, go to the Render menu, Show Geometry, and check Attachment Points. Then, mid-right there is a list of elements inside the model, and a folder for Attachment Points. Open it up and click on each attachment point, and it will highlight it in the preview. Figure out the name of the left arm attachment point (most often Weapon Left, but it can also be Weapon 01).
Then, in your Action actor, go to Launch Attachment Query, and change the Method to "Filter WeaponLeft (AMFilterWeaponLeft)," if that is the attachment point, or "Filter Weapon 01" if that it is, etc. If your attachment point is not present, you will have to create an Attachment Method, but it is unlikely that that will be the case.