delta.lst #

delta.lst file is used for entity networking in Half-Life. It describes the number of bits to send for certain variables that encode the entity state. The state is used by the client for various purposes (mostly rendering).

The mods can use a custom delta.lst to expand the networking protocol. While Featureful SDK should work with default delta.lst from valve/ directory, using some features do require having the custom file. Its latest version is distributed with the sample mod. Modmakers shouldn’t forget to include the custom delta.lst in their mods so these features work properly.

Just for documentation purposes we list the changes comparing to the default delta.lst:

• clientdata_t and weapon_data_t structs set m_iId to use 6 bits in order to support prediction for more weapons.
• entity_state_t sets skin to use 12 bits for proper rendering of attached sprites and beams on the maps with high number of entities.
• entity_state_t sets effects to use 12 bits to support more effects recognized by the client.