Grounding, slopes, steps, and jumping

Ground test course

Build reusable geometry containing:

• flat acceleration/braking lane with distance marks;
• gradual slopes below, at, and above WalkableFloorAngle;
• steps below, at, and above MaxStepHeight;
• narrow ledges and corners for perching;
• low ceilings for crouch/uncrouch;
• moving and rotating bases;
• seams between collision pieces.

Test capsule behavior first. The skeletal mesh is not the authoritative collision body.

Rotation ownership

Choose one primary path:

• bOrientRotationToMovement: face acceleration using RotationRate;
• bUseControllerDesiredRotation: rotate toward controller desired rotation using RotationRate;
• explicit gameplay rotation: disable competing automatic rotation and own it in one system.

Also reconcile ACharacter::bUseControllerRotationYaw. Conflicting owners cause snapping, oscillation, or a facing direction that disagrees with movement/aim.

Jump model

1. Define target apex height, time to apex, total airtime, horizontal control, and variable jump behavior.
2. Tune JumpZVelocity and GravityScale together.
3. Configure Character jump-hold behavior (JumpMaxHoldTime) only if variable-height jumps are desired; bind press to Jump and release to Stop Jumping.
4. Tune AirControl, boost settings, falling friction, and lateral cap.
5. Add coyote time and buffered jump as explicit gameplay forgiveness; route the timestamped input design to $unreal-enhanced-input.
6. Test stepping off edges, ceilings, slopes, moving bases, repeated press, held input, and landing during a buffered request.

Use CMC's GetMaxJumpHeight/GetMaxJumpHeightWithJumpTime as diagnostics, then verify in the actual level because collision, slopes, bases, and frame/network behavior matter.

Sprint and crouch

• Treat sprint as a state that changes desired max speed and perhaps acceleration, not as a second movement implementation.
• Decide hold versus toggle in the input layer.
• Keep the server authoritative over sprint/crouch eligibility.
• Use Character crouch support so capsule changes and movement integration remain coherent.
• Test uncrouch obstruction; never force the capsule into a ceiling.