Linedef type 20

Player standing on a moving PolyObject.

Linedef type 20, PolyObject – First Line, is a type of linedef special which is used on a PolyObject sector to make the game recognize it as such. For more information on setting up PolyObjects, see PolyObject tutorial.

Binary setup

Only one of these is needed per PolyObject. Assign this linedef action to one of the linedefs on the sector you want to be used as a PolyObject, and set the tag to the PolyObject's ID (which is the Angle of the corresponding PolyObject Spawn Point). Any further properties of the PolyObject are set via linedef type 22, PolyObject Parameters. If no Parameters linedef is used, the PolyObject will use default settings. Among other things, it will be tangible and opaque, and its flats will not be rendered.

Sample

Example file: ex_ld020_polyobject.wad (MAP01)

How to use

You may load this file into your favorite map editor, such as Zone Builder. Select MAP01 as the map to load. You may also load this file in the game: Save ex_ld020_polyobject.wad into the addons folder of your SRB2 directory. Start SRB2, go to the Addons menu, and then select ex_ld020_polyobject.wad. Start the game in Single Player mode. Press the Console button (~), and type in the command MAP MAP01 to access the example map. When you load this file in the game, it replaces Greenflower Zone Act 1.

UDMF setup

Only one of these is needed per PolyObject. Assign this linedef action to one of the linedefs on the sector you want to be used as a PolyObject, and set Argument 1 as the tag to the PolyObject's ID (which is the tag of the corresponding PolyObject Spawn Point).

To turn the PolyObject into a child PolyObject of another PolyObject, Argument 2 tag should be set to the parent PolyObject's ID. If this feature is not wanted, this field should be left empty; this tells the game that the PolyObject has no parent.

Argument 3 determines the translucency level of the PolyObject, ranging from 0 (fully opaque) to 10 (fully transparent).

Argument 4 / Flags toggles the following settings:

• If Flag [1] / Don't render insides is set, only the outer sides of the PolyObject will be rendered.
• If Flag [2] / Intangible is set, the PolyObject will be intangible.
• If Flag [4] / Stopped by pushables is set, the PolyObject will stop any movement if it comes in contact with a pushable Object.
• If Flag [8] / Don't render planes is set, the PolyObject's flats will not be rendered. By default, the flats will be visible.
• If Flag [16] / Trigger linedef executor on touch is set, the PolyObject will execute any trigger linedef set by Argument 5 tag when a player lands on it (as opposed to just standing on the PolyObject, or stepping up/down onto it from elsewhere).
• If Flag [32] / Crush player is set, the spawned PolyObject will crush players if they are caught between it and a wall, or if the PolyObject is moving fast enough and the player touches it.
• if Flag [64] / Cut cyan flat pixels is set, cyan pixels on the PolyObject's flats will be cut.

Sample

Example file: ExUDMF ld020 polyobject.wad (MAP01)

How to use

You may load this file into your favorite UDMF map editor, such as Ultimate Zone Builder. Select MAP01 as the map to load. You may also load this file in the game: Save ExUDMF ld020 polyobject.wad into the addons folder of your SRB2 directory. Start SRB2, go to the Addons menu, and then select ExUDMF ld020 polyobject.wad. Start the game in Single Player mode. Press the Console button (~), and type in the command MAP MAP01 to access the example map. When you load this file in the game, it replaces Greenflower Zone Act 1.

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