Door open automatically script

[palistov]

First, add AddEntityCollideCallback("Player", "trigger_area", "OpenDoor", true, 1);

your function to call will be

void OpenDoor(string &in asParent, string &in asChild, int alState)
{
AddPropImpulse("Door", X, Y, Z, "World"); //red is x axis, blue is z axis, green is y axis.
}

Change your X Y and Z values until they apply an appropriate force to open the door.