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1\如何通过输入来控制物体的移动
前提：物体必须添加RigidBody(刚体)组件
1.初始化 组件
选择在Awake()或者Start()方法中RigidBody rb = GetComponent<RigidBody>();
2.获得输入
在 void Update()方法中写入 获取代码
private float m_InputVerticalValue; private float m_InputHorizontalValue; void Update(){ m_InputVerticalValue = Input.GetAxis("Vertical"); //Input.GetAxis(String AxisName)，默认正向为1，负向为 -1 ，不动为 0 m_InputHorizontalValue = Input.GetAxis("Horizontal"); }
3.在Update() 或者 FixedUpdate()中利用 得到的输入值 m_InputVerticalValue，m_InputHorizontalValue;
//第一种RigidBody.AddForce()
private float force = 10;
void Update(){
……
rb.AddForce(force*m_InputVerticalValue*Time.deltaTime);
}
//另外一种 RigidBody.MovePosition() RigidBody.MoveRotation();
private void FixedUpdate()
{
// Move and turn the tank.
Move();
Turn();
}
private void Move()
{
// Adjust the position of the tank based on the player‘s input.
Vector3 movement = transform.forward*m_Speed*m_MovementInputValue*Time.deltaTime;
m_Rigidbody.MovePosition (transform.position + movement);
}
private void Turn()
{
float turn = m_TurnSpeed * m_TurnInputValue * Time.deltaTime;
// Adjust the rotation of the tank based on the player‘s input.
Quaternion turnQuaternion = Quaternion.Euler(0f,turn,0f);
m_Rigidbody.MoveRotation (transform.rotation * turnQuaternion);
}
2\Camera如何随着坦克移动，调整位置及视野？ Position Zoom
解决方案 ： 通过各个坦克的三维位置 计算得出平均位置
通过找到各个坦克 离平均位置的 距离 得到视野的大小
using UnityEngine;
public class CameraControl : MonoBehaviour
{
public float m_DampTime = 0.2f;
public float m_ScreenEdgeBuffer = 4f;
public float m_MinSize = 6.5f;
public Transform[] m_Targets;
private Camera m_Camera;
private float m_ZoomSpeed;
private Vector3 m_MoveVelocity;
private Vector3 m_DesiredPosition;
private void Awake()
{
m_Camera = GetComponentInChildren<Camera>();
}
private void FixedUpdate()
{
Move();
Zoom();
}
private void Move()
{
FindAveragePosition();
transform.position = Vector3.SmoothDamp(transform.position, m_DesiredPosition, ref m_MoveVelocity, m_DampTime);
}
private void FindAveragePosition()
{
Vector3 averagePos = new Vector3();
int numTargets = 0;
for (int i = 0; i < m_Targets.Length; i++)
{
if (!m_Targets[i].gameObject.activeSelf)
continue;
averagePos += m_Targets[i].position;
numTargets++;
}
if (numTargets > 0)
averagePos /= numTargets;
averagePos.y = transform.position.y;
m_DesiredPosition = averagePos;
}
private void Zoom()
{
float requiredSize = FindRequiredSize();
m_Camera.orthographicSize = Mathf.SmoothDamp(m_Camera.orthographicSize, requiredSize, ref m_ZoomSpeed, m_DampTime);
//SmoothDamp是一个渐变的过程
//需要ref ZoomSpeed 和 m_DampTime来计算渐变过程
}
private float FindRequiredSize()
{
Vector3 desiredLocalPos = transform.InverseTransformPoint(m_DesiredPosition);
float size = 0f;
for (int i = 0; i < m_Targets.Length; i++)
{
if (!m_Targets[i].gameObject.activeSelf)
continue;
Vector3 targetLocalPos = transform.InverseTransformPoint(m_Targets[i].position);
//以当前视野为参考系，3维转2维
Vector3 desiredPosToTarget = targetLocalPos - desiredLocalPos;
//计算相对位置
size = Mathf.Max (size, Mathf.Abs (desiredPosToTarget.y));
//取最大Y方向距离
size = Mathf.Max (size, Mathf.Abs (desiredPosToTarget.x) / m_Camera.aspect);
//取最大的符合分辨率的距离
}
size += m_ScreenEdgeBuffer;
size = Mathf.Max(size, m_MinSize);
return size;
}
public void SetStartPositionAndSize() //直接调整位置和视野，不用渐变过程
{
FindAveragePosition();
transform.position = m_DesiredPosition;
m_Camera.orthographicSize = FindRequiredSize();
}
}
Unity3d 札记-Tanks Tutorial 知识点汇总
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原文地址：http://www.cnblogs.com/dongfangliu/p/5796533.html
