Carrying and pushing "burning" props against other objects activate effects

[TheJollyCrack]

How exactly do you create objects on a map that activate with different props?

- pushing a watermelon or square block into an empty space to open a door

* Example: [url]https://www.youtube.com/watch?v=NWu6K41HDWo[/url] - Shown in Video: 8:35/16:21

- pushing a burning prop against a ceiling panel catching it on fire and crushing the player. "fire activates it - No Prop, npc or Player Damage - "

[Vizzys]

func_physbox parented to a brush or a model parented to the invisible physbox
trigger_teleport/point_teleport (with a filter for said func_physbox) to a info_target destination
trigger_multiple (filtered for said physbox) output at destination to disable motion of said func_physbox, holding it in place, and doing something like spark or open a door or whatever you want

use [url]https://developer.valvesoftware.com/wiki/Env_firesensor[/url] for fire related stuff

[TheJollyCrack]

I'm Sorry if this sounds irritating "The question and answer were correct before" but I'd like to rephrase what I was trying to ask.

How do make a trigger that only allows the activation of doors and switches with the use of specified named physics props?

Example: "Naming a prop_fish Charlie and moving it in front of a trigger to open the door (Nothing else but Charlie the fish will open the door)"

[Vizzys]

filter
place one of these in map
[url]https://developer.valvesoftware.com/wiki/Filter[/url]

then in a trigger_multiple you put the name of the filter to allow or ignore