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Splitscreen for Sandbox

¡Attention!: All Sandbox settings are present on the start game dialog, but very few have been tested! Ensure that the “persistance file” field isn't set to an important persistance file, or is left blank.
Have 2 players ⅌ computer while playing Sandbox. Player 1 uses the keyboard & mouse while player 2 uses a game controller.
Splitscreen for Sandbox is technically a gamemode; to split the screen, select “Splitscreen for Sandbox” from the gamemodes menu. Allow ≥ 2 players; the 2ⁿᵈ player requires a player slot. Notice the menu option “strict control segregation”: Check this if the game controller is affecting player 1. Notice the “bind key” fields; use these to specify keys to open each player's keybinding settings. The default is 120 (BACK button) for Player 2 & 60 (“/” key) for Player 1 (when “strict control segregation” is enabled). These fields can take either a key # or a proper key name, but they aren't validated! Invalid values may cause a Lua error.
§Known issues§
•Player 2 can't use the context menu or any tools. Player 2 can only spawn some items on the spawn menu.
•Player 2's viewmodel looks silly.
•Player 2's view is fixed while driving.
•The joysticks always control Player 2. Movement of the mouse always applies to Player 1's view. Keys can be bound to control each player's movement & view, but the joysticks & mouse are fixed.
•Player 2 is technically a bot; no Steam™ achievements for Player 2.
•The map is technically rendered 3 times: the default view & the 2 render.RenderView()'s completely covering it.
§Map included!§
Splitscreen for Sandbox works on any map, but sgm_split is like the face of Splitscreen for Sandbox: It's just as split as the screen, & it's split in a way that thematically matches Splitscreen for Sandbox!