public void Update()
{
var pos = InputTracker.GetMouseButtonDown(MouseButton.Left);
if (pos)
{
var point = InputTracker.MousePosition;
points.Add(new Vector3(point, 0));
//添加点之后更新buffer中的数据
UpdateBuffer();
}
//空格键清空
if (InputTracker.GetKeyDown(Key.Space))
{
points.Clear();
}
}
public void Update(float deltaSeconds)
{
////控制鼠标中键,进行缩放视图
var delta = InputTracker.GetMouseWheelDelta();
if (delta != 0)
{
//camera的position移动0.1个坐标单位
var de = delta * (_lookAtInfo.Range) * 0.1;
_lookAtInfo.Range += de;
//pos.Height += de;
//更新相机位置后更新View矩阵
UpdateCamera();
}
Vector2 mouseDelta = InputTracker.MousePosition - _previousMousePos;
//如果前一个点和当前点均位于地球上，则计算两者的经纬度之差，
var isMouseleftClick = InputTracker.GetMouseButton(MouseButton.Left);
if (isMouseleftClick && testwindowsCoordOnEllipse(_previousMousePos, out Geodetic2D preCoord) && testwindowsCoordOnEllipse(InputTracker.MousePosition, out Geodetic2D curPos))
{
var delatLat = curPos.Latitude - preCoord.Latitude;
var deltaLon = curPos.Longitude - preCoord.Longitude;
//设置lookAt的偏移量
_lookAtInfo.Longitude -= deltaLon;
if (_lookAtInfo.Longitude >= 2 * Math.PI)
{
_lookAtInfo.Longitude -= 2 * Math.PI;
}
if (_lookAtInfo.Longitude <= 0)
{
_lookAtInfo.Longitude += 2 * Math.PI;
}
_lookAtInfo.Latitude += delatLat;
if (_lookAtInfo.Latitude >= Math.PI / 2)
{
_lookAtInfo.Latitude = Math.PI / 2;
}
if (_lookAtInfo.Latitude <= -Math.PI / 2)
{
_lookAtInfo.Latitude = -Math.PI / 2;
}
//重新计算相关参数
UpdateCamera();
}
var isMouseWhellClick = InputTracker.GetMouseButton(MouseButton.Middle);
if ((mouseDelta.Y != 0 || mouseDelta.X != 0) && isMouseWhellClick)
{
var deltaAngleY = (float)Math.PI * 0.002f * mouseDelta.Y;
var deltaAngleX = (float)Math.PI * 2 * 0.0005f * mouseDelta.X;
_lookAtInfo.Tilt += -deltaAngleY;
_lookAtInfo.Heading += -(float)deltaAngleX;
if (_lookAtInfo.Heading > Math.PI * 2)
{
_lookAtInfo.Heading = (float)Math.PI * 2;
}
if (_lookAtInfo.Tilt < 0)
{
_lookAtInfo.Tilt = 0;
}
if (_lookAtInfo.Tilt > Math.PI / 2)
{
_lookAtInfo.Tilt = (float)Math.PI / 2;
}
UpdateCamera();
}
_previousMousePos = InputTracker.MousePosition;
UpdateCamera();
}