I know how to make the big red buttons from portal, but I want to be able to shoot it with the portal gun to activate it. I would use func_portal_detect unfortunately, you cant place portals on buttons. Isnt there a flag to check that says shooting it activates it? if so, would that include the portal gun?

I don't think so.
This flag is meant to be used with damages.
And the portalgun doesn't damage anything.

so how else could i do it?

Maybe an invisible brush over the button?
When that brush is hit, detect the portal with portal_detector, and destroy it immediatly. The portal should not even appear.
At the same time you dstroy the portal, activate the button.

Hyakkidouran wrote:
Maybe an invisible brush over the button?
When that brush is hit, detect the portal with portal_detector, and destroy it immediatly. The portal should not even appear.
At the same time you dstroy the portal, activate the button.

I just tried it and got it working. I used a func_wall (named "wall")and the nodraw texture. "button_door" is the func_door used to move the top button prop. On the portal_detector add the following outputs:

OnStartTouchPortal1>wall>kill
OnStartTouchPortal2>wall>kill
OnStartTouchPortal1>button_door>open
OnStartTouchPortal2>button_door>open

The portal never shows.

Very clever! I like it.

thanks, this will be a useful tool to put in my map and will lend to its uniqueness