User:Dr. Orange/Test Chamber Door

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This tutorial will show step-by-step how to create the test chamber doors seen throughout the Portal test chambers. Test chamber doors are often used to gate the player until they have completed a puzzle, but can also be used as a puzzle element themselves.

Construction

Step 1

Create a 32w*128l*128h brush. Next use the clipping tool to create three horizontal clips at 24, 48 and 84 units from the top, respectively.

After that, select the second brush from the top and create a diagonal clip 48 units from the side of the brush at the top to 16 units in from the side at the bottom. Do the same thing on the other side of the brush and delete the wedge that remains in the middle.

Next, select the brush below the previous brush and create a diagonal clip from 16 units in from the side at the top to the bottom side corner of the brush. Do the same on the other side and delete the remaining wedge.

Now, select the bottommost brush and create a diagonal clip from the top side corner to 20 units in from the side at the bottom. Do the same thing on the other side of the brush, then delete the remaining wedge.

Finally, select all of the brushes and tie them to a func_detail entity. After that, texture the front and back sides with the same texture of the wall that the door is set into. Texture all of the remaining faces with tools/toolsnodraw.

Step 2

Create a prop_static entity and set its World Model to models/props/door_01_frame_wide_reference.mdl. Align the door frame model within the frame brushes.

Step 3

Create a 8w*56l*104h brush textured with tools/toolsnodraw. Align it to the left of the center of the door frame, and tie this brush to a func_door entity. Make sure that all of its flags are unchecked and set the following keyvalues on it:

Property Name	Value
Name	door_left
Speed	150
Stop Sound	Portal.doorclose
Delay Before Reset	-1
Lip	12
Move Direction	0 270 0

Next create an identical 8w*56l*104h nodraw textured brush, but align it to the right of the center of the door. Tie this brush to a func_door entity, make sure all of its flags are unchecked, and set the following keyvalues:

Property Name	Value
Name	door_right
Speed	150
Stop Sound	Portal.doorclose
Delay Before Reset	-1
Lip	12
Move Direction	0 90 0