🧩 Raycast2D
The Raycast2D component allows a GameObject to perform 2D raycasting queries against the physics world.
A ray is cast in a specified direction and length, detecting collisions with other physics bodies along its path.
When a collision occurs, the component automatically notifies both the owner object and the impacted object through the OnImpact and OnImpactEnd callbacks. This makes it useful for mechanics such as line-of-sight detection, laser beams, sensors, or trigger-based interactions.
It also provides a simple debug visualization, drawing the ray as a red line in the scene.
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float length: The length of the ray (default: 5.0f). -
Vector2 direction: The normalized direction vector of the ray (default: (0, -1), pointing upwards).
Raycast2D()Creates a new Raycast2D instance with default values.
On every update, the component casts a ray starting at the GameObject's position and extending in the specified direction for the configured length.
If the ray intersects a fixture, the component triggers OnImpact on both the owner and the impacted object.
If the ray moves from one object to another, the previous object receives an OnImpactEnd notification before the new impact is registered.
If the ray no longer intersects any object, OnImpactEnd is called on the last impacted object, signaling that the interaction has ended.
If no object is hit, OnImpactEnd is called when leaving the last impacted object.