shunlog
commented
1 year ago Here's a clearer demonstration.
Without "slide_on_slope", collision is jittery:
https://github.com/godotengine/godot/assets/48106195/6f3438a8-4fe1-4209-aaee-48279b59582c
With "slide_on_slope", collision is perfect:
https://github.com/godotengine/godot/assets/48106195/7eb0ab2c-a566-49b1-963e-fcb91901670d
Godot version
v4.0.3.stable.official [5222a99f5]
System information
Issue description
When using a SeparationRayShape2D in a CollisionShape2D, the collision in the moment of landing is jittery (see in the video on the left). In other words, the character body "falls through" the static body for a frame right upon impact, then goes back up on top of the static body, where it should be. What should happen is what you see on the right in the video, the character not falling through the static body, even when "slide_on_slope" is set to false.
movie.webm
This issue didn't exist in Godot v3.5. I've tried different physics parameters, but the only thing that solved it was setting "slide_on_slope" of SeparationRayShape2D to true.
Steps to reproduce
Create a CharacterBody2D with a CollisionShape2D set to SeparationRayShape2D. Make sure that "slide_on_slope" is set to false. Add the default script to CharacterBody2D to enable movement. Create a static body for the character to jump on. Observe that the collision is jittery right upon impact.
Minimal reproduction project
godot4_RayShape_bug.zip