![\"\"](\"http:\/\/oztalay.com\/matt\/wp-content\/uploads\/2010\/03\/physicsDoor.jpg\" "\\"physicsDoor\\"")
<\/a><\/p>\nPop open this level in UDK for a demonstration:<\/p>\n
\/\/UPDATE: The level posted below takes place in a subtractive level. It can be pasted into an additive level, but you need to give it a CSG base first.<\/p>\n
Tired of animating a door to open and close in Matinee when a player touches a trigger? Wish your player could take a little more ownership over their door opening? Want no longer, here’s some instructions on making a dynamic physics door.<\/p>\n
Add your door asset as a RigidBodyActor<\/p>\n
Add a RB_HingeActor<\/p>\n
Select your RB_HingeActor and click the “lock” button in the top right-hand corner of the properties window<\/p>\n
Select your door asset<\/p>\n
Click the green arrow next to “Constraint Actor 1”. This tells the RB_HingeActor to constrain your door<\/p>\n
The picture below shows what settings go where, the settings outlined below are the same.<\/p>\n
When you set Swing 1LimitAngle a green hemisphere will form around the middle of the RB_HingeActor. This shows the range of motion of your asset. Since all Actors in Unreal have a direction, you may need to rotate your RB_HingeActor so its range of motion matches the desired effect.<\/p>\n
Your door will pivot based on where you put your RB_HingeActor. Be careful not to put it too far away or your door will look rather odd indeed.<\/p>\n
Source code is below the picture for the sample level.<\/p>\n
\/this section tells the RB_HingeActor which kActor it acts upon
\nConstraint Actor 1 = The kActor in question<\/p>\n
\/\/this section sets its range of motion
\nSwing 1Limit Angle = 90
\nSwing Limited = TRUE
\nTwist Limit Angle = FALSE
\nTwist Limited = TRUE<\/p>\n
\/\/this section prevents it from moving around
\nLinear Limit Stiffness = 100
\nLinear XSetup
\n-b Limited = TRUE
\nLinear YSetup
\n-b Limited = TRUE
\nLinear ZSetup
\n-b Limited = TRUE<\/p>\n
Pop open this level in UDK for a demonstration:<\/p>\n<\/a><\/p>\n