Ray, clone, draw line, Ray clone draw line

Ray, clone, draw line, Ray clone draw line

1, Ray

(1) Ray rays

A ray is an infinite line starting at origin and going in some direction.

Ray is an infinite line with a starting point and a direction.

Structure:

Ray ray = new Ray(transform.position, transform.forward);

Transform. position is the starting point, and transform. forward is the direction.
(2) Raycast ray projection
C#=> Public static bool Raycast (Vector3 sourcePosition, Vector3 targetPosition, out NavMeshHit hit, int areaMask );

SourcePosition: Ray start point

TargetPosition: Ray end point

Hit: Save the properties of the ray projection position

AreaMask: When drawing a path, the bitmask specifies the path that can be passed in the NavMesh area.
(3) RaycastHit ray projection Collision Information

 

BarycentricCoordinate	The barycentric coordinate of the triangle we hit. Coordinates of the center of gravity of the triangle.
Collider	The Collider that was hit. Collision server.
Distance	The distance from the ray's origin to the impact point. The distance from the origin of the ray to the touch point.
LightmapCoord	The uv lightmap coordinate at the impact point. Coordinates of the UV light map at the touch point.
Normal	The normal of the surface the ray hit. Rays touch the normal of the surface.
Point	The impact point in world space where the ray hit the collider. In the world coordinate space, rays touch the contact point of the collision tool.
Rigidbody	The Rigidbody of the collider that was hit. If the collider is not attached to a rigidbody then it is null. The rigid body on the collision server. If no rigid body is attached to the collision generator, null is returned.
TextureCoord	The uv texture coordinate at the impact point. UV texture coordinates at the touch point.
TextureCoord2	The secondary uv texture coordinate at the impact point. The second set of UV texture coordinates at the contact point.
Transform	The Transform of the rigidbody or collider that was hit. The transformation of the rigid body or collision.
TriangleIndex	The index of the triangle that was hit. The index of the triangle.

2. Clone

C#=> Static ObjectInstantiate(Object original, Vector3 position, Quaternion rotation );
C#=> Static Object Instantiate (Object original );

Parameters

Original	An existing object that you want to make a copy of. The existing object you want to copy
Position	Position for the new object. Location of the new object
Rotation	Orientation of the new object. Orientation of the new object

Clones the object original and returns the clone. cl

Clone the original object and return the cloned object.

The above is taken from the Unity holy book.

3. Draw a line

Using UnityEngine; using System. collections; public class Drawwarnline: MonoBehaviour {// Use this for initialization private Vector3 pos1; // The Position of the first vertex private Vector3 pos2; // The position of the second vertex private RaycastHit hit; private Ray ray; private int num = 0; public bool ischoose; // determines whether to start drawing public GameObject warnline; // Line Model
Void Update () {if (Input. getMouseButtonDown (0) // press the left mouse button {ray = Camera. main. screenPointToRay (Input. mousePosition); // a ray is projected from the master camera to the mouse position if (Physics. raycast (ray, out hit) // cast a ray of light in the scene that can collide with all the colliding devices. {If (hit. collider! = Null) // collision to the collision generator {if (! Ischoose) {pos1 = new Vector3 (hit. point. x, hit. point. y, hit. point. z); // record the coordinates of the first vertex // Debug. log (pos1); ischoose = true;} else {num ++; pos2 = new Vector3 (hit. point. x, hit. point. y, hit. point. z); // coordinate of the second vertex // Debug. log (pos2); var distance = Vector3.Distance (pos2, pos1); // the distance between two points. Here, var is of the float type and var is used, var automatically detects the type Vector3 ction = (pos2-pos1 ). normalized; // The vector GameObject warnobj = GameObject in the direction of the line to be spent. instantiate (warnline, (pos2-pos1)/2, Quaternion. identity) as GameObject; // clone alert line warnobj. name = "warnline" + num; warnobj. transform. localScale = new Vector3 (100f, 10f, distance * 70); // adjust the size of warnobj according to the parent object. transform. position = warnobj. transform. position + pos1; // The position of warnobj. transform. forward = direction; warnobj. transform. parent = GameObject. find ("pwarnline "). transform; // Debug. log (direction); ischoose = false ;}}}}}}