Character Step

These files are for a playable demo that include the main script that handles the step up/down functionality, as well as a basic third person controller and the demo level.

Go to Scripts/character_step.gd if you just want the file without the demo level and player controller.

Purpose:

This static class helps CharacterBody3D objects ascend and descend ledges such as stairs. PhysicsServer3D.body_test_motion() is used to project the character as if they were moving up the ledge to test for collision. Then either a clear position is returned or the CharacterBody3D’s original position, where the body was before the projection, is returned to indicate the ledge can not be ascended or descended.

Usage:

Be sure to utilize these methods within the CharacterBody3D’s _physics_process() and to use if statements to reduce the number of unnecessary calls. For step_up I recommend at least preventing calls if not moving. For step_down I recommend having a was_on_floor bool, in a leading if statement as well as calling when velocity.y <= 0 and not is_on_floor(). was_on_floor should be set to is_on_floor() at the beginning of _physics_process() to determine if the CharacterBody3D was on a floor before it was moved.

step_up should come BEFORE move_and_slide
move_and_slide will smooth the movement of the character after step_up

step_down should come AFTER move_and_slide
this is because if the player is not grounded but they were grounded before they moved then they have stepped off a ledge and it should be checked if they can step_down

Inspired by Godot: Stair-stepping Demo addon

https://github.com/kelpysama/Godot-Stair-Step-Demo/tree/main

It did not quite work for me for my third person controller so I built my own, taking some techniques from it, but remaking it to work as a static class so it can easily be added to any character scripts.