Extended Platform Placement is a mod that makes platforms placed like how ropes do. Trying to place a platform where one already exists will extend the platform to the direction your character is facing.

There are 5 modes that decides how the platforms are extended. Set a hotkey or type /epmode [mode name] to switch modes.

• Auto: The slope of the platform is decided by the slope of the one at the cursor. Set by default.
• Horizontal: Only extends platforms horizontally.
• Upward: Always extends platforms upward.
• Downward: Always extends platforms downward.
• Off: Does not extend platforms(no mod effect).

You can choose several options via config.

• Smart Platform Check: Decide whether this mod affects all items that 'seem' to be platforms, or only items that Terraria says to be platforms.
• Faster Placement: Make the extension extremely faster.
• Apply for minecart tracks: Auto mode behaves same as Horizontal. You have to manually set mode to make diagonal tracks.

• Platforms are extended outside the boundary.

I am very new to tModLoader and there may be some problems that I didn't find out. If you find a bug, know how to fix the known issues, or code pieces that are unconventional, then you are more than welcome to open an issue or make a pull request.