Unity keeps the camera behind and above the player

Write it at the front

There is a need , Let the camera follow the player all the time , And rotate with the player's rotation .

Camera follow effect

Principle explanation
1、 Use the coordinates of the camera to get the coordinates of the player to get the upward and backward distance of the camera relative to the player

The corresponding code

camera2PlayerDir = this.transform.position-playerTransform.position;
playerUp = camera2PlayerDir.y;
playerBack= camera2PlayerDir.z;

2、 Use the position after the player moves + The upward distance of the camera relative to the player ×Vector3.up+ The backward distance of the camera relative to the player ×playerTransform.forward( The current direction of the player ) You can get the position where the camera is going to move

The corresponding code

targetPosition = playerTransform.position + Vector3.up * playerUp + playerTransform.forward * playerBack;

3、 Use Vector3.Lerp Make the camera move more balanced . The degree of camera rotation is the degree of player rotation .

Randomly generate enemy effect

Principle explanation
In order that the generated enemies will not overlap , That is, two tanks collide in the same place , Need to use Physics.CheckSphere This function .
First, the map boundary and the ground Layer Set up Plane

Then use... In the code LayerMask layerMask = ~LayerMask.GetMask("Plane"); Let the ray not detect Plane Objects at this level

LayerMask layerMask = ~LayerMask.GetMask("Plane");// Equivalent to ~(1<<6)
do {
    
    randomX = Random.Range(-createX, createX);
    randomY = Random.Range(-createY, createY);
} while (Physics.CheckSphere(new Vector3(randomX,0,randomY),createRadius,layerMask));

Written in the back

learn Unity Math is really important ！！！！