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References - Cstat Values

Cstat Values

These are the cstat bitfield values for the three different object types in a map: sprites, walls, and sectors (floors/ceilings). I gathered this information from various sources including the source code documentation as well as the EDukeWiki, then reprocessed it to my liking. Cstat values determine the way an object is rendered as well as a few special interactive properties. These values can be edited manually in 2D mode with F8 for walls and sprites, or F7 for sector floors/ceilings. The cstat is displayed as a decimal (base 10) value in 3D mode, but as a hexadecimal (base 16) value in 2D mode. The value you input in standard decimal will be automatically converted to hexadecimal.



In order to use multiple flag values, they must be added together. The majority of these values can be automatically assigned with standard keypresses in 3D mode, which are listed if applicable.


SPRITES
Bit Value Description Keypress
0 1 Enable blocking flag. [B]
1 2 Set as semi-transparent. [T]
2 4 Flip sprite around x-axis. [F]
3 8 Flip sprite around y-axis. [F]
4 16 Set as wall-aligned. [R]
5 32 Set as floor-aligned. [R]
6 64 Set as one-sided. [1]
7 128 Set as "true-centered" (as opposed to "foot-centered"). [C]
8 256 Enable hitscan flag. [H]
9 512 Set as transparent (must be combined with cstat value 2). [T]
10-14 1024-16384 *Reserved* N/A
15 32768 Set as invisible. -



WALLS
Bit Value Description Keypress
0 1 Enable blocking flag. [B]
1 2 Enable "bottom texture swap". This makes the top and bottom half of a wall separately editable. However, they will still share repeat values. [2]
2 4 Align texture to floor (bottom orientation). [O]
3 8 Flip texture around x-axis. [F]
4 16 Set as masked wall (must be set on both sides, keypress does this automatically). [M]
5 32 Set as 'solid' one-sided masked wall. [1]
6 64 Enable hitscan flag. [H]
7 128 Set as semi-transparent. [T]
8 256 Flip texture around y-axis. [F]
9 512 Set as transparent (must be combined with cstat value 128). [T]
10-15 1024-32768 *Reserved* N/A



SECTORS (FLOORS/CEILINGS) *
Bit Value Description Keypress
0 1 Set as parallaxed. [P]
1 2 Floor/Ceiling is sloped. [[ or ]]
2 4 Swap the texture's x and y axes. [F]
3 8 Enable texture expansion (more accurately described as "compression"). [E]
4 16 Flip texture around x-axis. [F]
5 32 Flip texture around y-axis. [F]
6 64 Enable relative alignment. [R]
7-15 128-32768 *Reserved* N/A
7 128 Masked Floor/Ceiling (unused remnant of the engine). -
8 256 Translucent Masked Floor/Ceiling (unused remnant of the engine). -
7+8 384 Reverse Translucent Masked Floor/Ceiling (unused remnant of the engine). -

* Floors and ceilings can have separate values. They also aren't technically "cstat" values, but they're very similar.




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