raycast2d
RaycastHit2D hit = Physics2D.Raycast(origin, direction, distance, layerMask, minDepth, maxDepth);raycast2d
RaycastHit2D hit = Physics2D.Raycast(origin, direction, distance, layerMask, minDepth, maxDepth);raycast unity
RaycastHit hit;
// Does the ray intersect any objects excluding the player layer
if (Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit, Mathf.Infinity, layerMask))
{
Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * hit.distance, Color.yellow);
Debug.Log("Hit");
}
else
{
Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * 1000, Color.white);
Debug.Log("No Hit");
}unity raycast 2d
using UnityEngine;public class Example : MonoBehaviour
{
// Float a rigidbody object a set distance above a surface. public float floatHeight; // Desired floating height.
public float liftForce; // Force to apply when lifting the rigidbody.
public float damping; // Force reduction proportional to speed (reduces bouncing). Rigidbody2D rb2D;
void Start()
{
rb2D = GetComponent<Rigidbody2D>();
} void FixedUpdate()
{
// Cast a ray straight down.
RaycastHit2D hit = Physics2D.Raycast(transform.position, -Vector2.up); // If it hits something...
if (hit.collider != null)
{
// Calculate the distance from the surface and the "error" relative
// to the floating height.
float distance = Mathf.Abs(hit.point.y - transform.position.y);
float heightError = floatHeight - distance; // The force is proportional to the height error, but we remove a part of it
// according to the object's speed.
float force = liftForce * heightError - rb2D.velocity.y * damping; // Apply the force to the rigidbody.
rb2D.AddForce(Vector3.up * force);
}
}
}raycasthit2d unity
RaycastHit2D hit = Physics2D.Raycast(transform.position, -Vector2.up);unity3d raycast
using UnityEngine;
// C# example.
public class ExampleClass : MonoBehaviour
{
void Update()
{
// Bit shift the index of the layer (8) to get a bit mask
int layerMask = 1 << 8;
// This would cast rays only against colliders in layer 8.
// But instead we want to collide against everything except layer 8. The ~ operator does this, it inverts a bitmask.
layerMask = ~layerMask;
RaycastHit hit;
// Does the ray intersect any objects excluding the player layer
if (Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit, Mathf.Infinity, layerMask))
{
Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * hit.distance, Color.yellow);
Debug.Log("Did Hit");
}
else
{
Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * 1000, Color.white);
Debug.Log("Did not Hit");
}
}
}Copyright © 2021 Codeinu
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