public void DecreaseCamera()
{
float localScale = eyeCamera.orthographicSize;
float scale = localScale + zoomFactor;
Scale2D.SetCameraOrthographicSize(scale, eyeCamera);
}
// Use this for initialization
public void EnlargeCamera()
{
float localScale = eyeCamera.orthographicSize;
float scale = localScale - zoomFactor;
Scale2D.SetCameraOrthographicSize(scale, eyeCamera);
}
protected override void UpdateCameraSize()
{
#if !UNITY_EDITOR && (UNITY_IOS || UNITY_ANDROID)
return;
#endif
float scaleNow = Input.GetAxis("Mouse ScrollWheel");
if (scaleNow == 0)
{
return;
}
touchCenter = Input.mousePosition;
worldCenter = eyeCamera.ViewportToWorldPoint(eyeCamera.ScreenToViewportPoint(touchCenter));
//放大因子， 一个像素按 0.01倍来算(100可调整)
float scaleFactor = scaleNow / zoomFactor;
float localScale = eyeCamera.orthographicSize;
float scale = localScale + scaleFactor;
if (scale < minScale)
{
scale = minScale;
}
else if (scale > maxScale)
{
scale = maxScale;
}
Scale2D.SetCameraOrthographicSize(scale, eyeCamera);
Vector3 nowWorldCenter = eyeCamera.ViewportToWorldPoint(eyeCamera.ScreenToViewportPoint(touchCenter));
transform.position = transform.position + (worldCenter - nowWorldCenter);
if (Bounds)
{
var x = transform.position.x;
var y = transform.position.y;
var cameraHalfWidth = eyeCamera.orthographic ? Scale2D.cameraSize.x / 2 : 0;
var cameraHalfHeight = eyeCamera.orthographic ? Scale2D.cameraSize.y / 2 : 0;
//保证不会移除包围盒
// Debug.Log(transform.position);
x = Mathf.Clamp(x, minVec3.x + cameraHalfWidth, maxVec3.x - cameraHalfWidth);
y = Mathf.Clamp(y, minVec3.y + cameraHalfHeight, maxVec3.y - cameraHalfHeight);
transform.position = new Vector3(x, y, transform.position.z);
}
touchCenter = Input.mousePosition;
worldCenter = eyeCamera.ViewportToWorldPoint(eyeCamera.ScreenToViewportPoint(touchCenter));
}
protected virtual void UpdateCameraSize()
{
if (Input.touchCount != 2)
{
return;
}
for (int i = 0; i < Input.touchCount; ++i)
{
if (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(i).fingerId))
{
return;
}
}
//多点触摸, 放大缩小
Touch newTouch1 = Input.GetTouch(0);
Touch newTouch2 = Input.GetTouch(1);
for (int i = 0; i < Input.touchCount; ++i)
{
if (Input.GetTouch(i).phase == TouchPhase.Began || Input.GetTouch(i).phase == TouchPhase.Canceled || Input.GetTouch(i).phase == TouchPhase.Ended)
{
oldTouch2 = newTouch2;
oldTouch1 = newTouch1;
touchCenter = (oldTouch1.position + oldTouch2.position) / 2;
worldCenter = eyeCamera.ViewportToWorldPoint(eyeCamera.ScreenToViewportPoint(touchCenter));
return;
}
}
//计算老的两点距离和新的两点间距离，变大要放大模型，变小要缩放模型
float oldDistance = Vector2.Distance(oldTouch1.position, oldTouch2.position);
float newDistance = Vector2.Distance(newTouch1.position, newTouch2.position);
//两个距离之差，为正表示放大手势， 为负表示缩小手势
float offset = oldDistance - newDistance;
//放大因子， 一个像素按 0.01倍来算(100可调整)
float scaleFactor = offset / zoomFactor;
float localScale = eyeCamera.orthographicSize;
float scale = localScale + scaleFactor;
if (scale < minScale)
{
scale = minScale;
}
else if (scale > maxScale)
{
scale = maxScale;
}
Scale2D.SetCameraOrthographicSize(scale, eyeCamera);
Vector3 nowWorldCenter = eyeCamera.ViewportToWorldPoint(eyeCamera.ScreenToViewportPoint(touchCenter));
transform.position = transform.position + (worldCenter - nowWorldCenter);
if (Bounds)
{
var x = transform.position.x;
var y = transform.position.y;
var cameraHalfWidth = eyeCamera.orthographic ? Scale2D.cameraSize.x / 2 : 0;
var cameraHalfHeight = eyeCamera.orthographic ? Scale2D.cameraSize.y / 2 : 0;
//保证不会移除包围盒
// Debug.Log(transform.position);
x = Mathf.Clamp(x, minVec3.x + cameraHalfWidth, maxVec3.x - cameraHalfWidth);
y = Mathf.Clamp(y, minVec3.y + cameraHalfHeight, maxVec3.y - cameraHalfHeight);
transform.position = new Vector3(x, y, transform.position.z);
}
//记住最新的触摸点，下次使用
oldTouch1 = newTouch1;
oldTouch2 = newTouch2;
touchCenter = (oldTouch1.position + oldTouch2.position) / 2;
worldCenter = eyeCamera.ViewportToWorldPoint(eyeCamera.ScreenToViewportPoint(touchCenter));
}