shabi
利用两点间的距离公式(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)实现对于双指的距离判断
判断是扩大还是缩小
可通过距离判断放大还是缩小
bool isEnLarge(Vector2 oP1,Vect
public class Enlarge : MonoBehaviour {
//左手手指
Vector2 oldPos1;
//右手手指
Vector2 oldPos2;
// Use this for initialization
void Start() {
//左手手指
Vector2 oldPos1;
//右手手指
Vector2 oldPos2;
// Use this for initialization
void Start() {
}
// Update is called once per frame
void Update() {
if(Input.touchCount == 2){
if (Input.GetTouch(0).phase == TouchPhase.Moved || Input.GetTouch(1).phase == TouchPhase.Moved)
{
//现在手指所在坐标
Vector2 temPos1 = Input.GetTouch(0).position;
Vector2 temPos2 = Input.GetTouch(1).position;
void Update() {
if(Input.touchCount == 2){
if (Input.GetTouch(0).phase == TouchPhase.Moved || Input.GetTouch(1).phase == TouchPhase.Moved)
{
//现在手指所在坐标
Vector2 temPos1 = Input.GetTouch(0).position;
Vector2 temPos2 = Input.GetTouch(1).position;
if (isEnlarge(oldPos1, oldPos2, temPos1, temPos2))
{
//放大
float oldScale = transform.localScale.x;
float newScale = oldScale * 1.025f;
transform.localScale = new Vector3(newScale, newScale, newScale);
}
else
{
//缩小
float oldScale = transform.localScale.x;
float newScale = oldScale / 1.025f;
transform.localScale = new Vector3(newScale, newScale, newScale);
}
oldPos1 = temPos1;
oldPos2 = temPos2;
}
}
}
{
//放大
float oldScale = transform.localScale.x;
float newScale = oldScale * 1.025f;
transform.localScale = new Vector3(newScale, newScale, newScale);
}
else
{
//缩小
float oldScale = transform.localScale.x;
float newScale = oldScale / 1.025f;
transform.localScale = new Vector3(newScale, newScale, newScale);
}
oldPos1 = temPos1;
oldPos2 = temPos2;
}
}
}
//判断手势
bool isEnlarge(Vector2 oP1, Vector2 oP2, Vector2 nP1, Vector2 nP2)
{
float length1 = Mathf.Sqrt((oP1.x - oP2.x) * (oP1.x - oP2.x) + (oP1.y - oP2.y) * (oP1.y - oP2.y));
float length2 = Mathf.Sqrt((nP1.x - nP2.x) * (nP1.x - nP2.x) + (nP1.y - nP2.y) * (nP1.y - nP2.y));
if (length1 < length2) {
return true;
}
else { return false; }
}
}
{
float length1 = Mathf.Sqrt((oP1.x - oP2.x) * (oP1.x - oP2.x) + (oP1.y - oP2.y) * (oP1.y - oP2.y));
float length2 = Mathf.Sqrt((nP1.x - nP2.x) * (nP1.x - nP2.x) + (nP1.y - nP2.y) * (nP1.y - nP2.y));
if (length1 < length2) {
return true;
}
else { return false; }
}
}
//放大缩小
Vector2 oldPos1;
Vector2 oldPos2;
void Update()
{
if(Input.touchCount==2)
{
if(Input.GetTouch(0).phase==TouchPhase.Moved||Input.GetTouch(1).phase==TouchPhase.Moved)
{
Vector2 temPos1=Input.GetTouch(0).position;
Vector2 temPos2=Input.GetTouch(1).position;
if(isEnlarge(oldPos1,oldPos2,temPos1,temPos2))
{
float oldScale=transform.localScale.x;
float newScalse=oldScale*1.025f;
transform.localScale=new Vector3(newScalse,newScalse,newScalse);
}
if(isEnlarge(oldPos1,oldPos2,temPos1,temPos2))
{
float oldScale=transform.localScale.x;
float newScalse=oldScale/1.025f;
transform.localScale=new Vector3(newScalse,newScalse,newScalse);
}
oldPos1=temPos1;
oldPos2=temPos2;
}
}
}
bool isEnlarge(Vector2 oP1,Vector2 oP2,Vector2 nP1,Vector2 nP2)
{
float length1= Mathf.Sqrt((oP1.x-oP2.x)*(oP1.x-oP2.x)+(oP1.y-oP2.y)*(oP1.y-oP2.y));
float length2= Mathf.Sqrt((nP1.x-nP2.x)*(nP1.x-nP2.x)+(nP1.y-nP2.y)*(nP1.y-nP2.y));
if(length1<length2)
{
return true;
}else
{
return false;
}
}
·
Mathf.Sqrt 开根号的方法 （勾股定理）
