效果演示

左右键水平方向转动，上下键垂直方向转动

旋转摄像机的代码是

var dt = Time.deltaTime;
x -= Input.GetAxis(“Horizontal”) * horizontalSpeed * dt;
y += Input.GetAxis(“Vertical”) * verticalSpeed * dt;

y = ClampAngle(y, minVertical, maxVertical);

var rotation = Quaternion.Euler(y, x, 0);
var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;

transform.rotation = rotation;
transform.position = position;

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