How to implement one way collision for walls from left or right side?

Question

My Godot 2d game contains lines that servers as platforms and walls, they are defined as segmentShape2D which contain a start point and an endpoint:

var staticBody2D = new StaticBody2D();
Vector2 a = new Vector2((float)foothold.X1, (float)foothold.Y1);
Vector2 b = new Vector2((float)foothold.X2, (float)foothold.Y2);
Vector2 direction = (b - a).Normalized();

var collisionShape = new CollisionShape2D();
collisionShape.OneWayCollision = true;
var segmentShape = new SegmentShape2D();
segmentShape.A = a;
segmentShape.B = b;
collisionShape.Shape = segmentShape;

staticBody2D.SetMeta("direction", direction.Rotated(Mathf.RadToDeg(90f)));
staticBody2D.SetMeta("layer", layer);
staticBody2D.AddChild(collisionShape);
AddChild(staticBody2D);

For platforms my character behaves normally, it can jump from below to the current platform. But for walls, my character passes through from both left&right sides, as oneWayCollision only detects collision from UP or Downside.

So My question is how to implement a one-way collision wall or slope based on its direction in Godot?

Patrick Zocli · Accepted Answer · 2024-09-13 18:12:24Z

0

Since the character should not enter the ground (I suppose), you could use a CollisionPolygone2D instead.

answered Sep 13, 2024 at 18:12

Patrick Zocli

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