public virtual void ComputeViewMatrix()
{
double lat1 = _latitude.Degrees;
double lon1 = _longitude.Degrees;
EyeDiff.X = SMath.DegreesToRadians(_latitude.Degrees - lat1);
EyeDiff.Y = SMath.DegreesToRadians(_longitude.Degrees - lon1);
ReferenceCenter = SMath.SphericalToCartesianV3D(
_latitude.Degrees,
_longitude.Degrees,
WorldRadius);
if (World.Settings.Project == Projection.OrthoGraghics)
{
//lat1 = 0;
//lon1 = 0;
EyeDiff.X = 0;
EyeDiff.Y = 0;
}
Vector3d defaultPosition = SMath.SphericalToCartesianV3D(lat1, lon1, _worldRadius);
m_ViewMatrix = Matrix4d.LookAtRH(
defaultPosition,
Vector3d.Empty,
cameraUpVector);
//TODO JHJ 这是干什么的 有什么用
m_ViewMatrix *= Matrix4d.Translation(0, 0, _worldRadius);
m_ViewMatrix *= Matrix4d.RotationYawPitchRoll(-EyeDiff.Y, EyeDiff.X, 0);
m_ViewMatrix *= Matrix4d.Translation(0, 0, -_worldRadius);
m_ViewMatrix *= Matrix4d.RotationYawPitchRoll(
0,
-_tilt.Radians,
this._heading.Radians);
m_ViewMatrix *= Matrix4d.Translation(0, 0, (-this._distance));
if (World.Settings.Project == Projection.Perspective)
{
m_ViewMatrix *= Matrix4d.RotationZ(this._bank.Radians);
}
else
{
m_ViewMatrix *= Matrix4d.RotationZ(this._bank.Radians);
}
// Extract camera position
Matrix4d cam = Matrix4d.Invert(m_ViewMatrix);
_position = new Vector3d(cam[3, 0], cam[3, 1], cam[3, 2]);
}
public void Unproject(object viewport, Matrix4d projection, Matrix4d view, Matrix4d world)
{
//Microsoft.DirectX.Vector3 test = ConvertDX.FromVector3d(this);
//test.Unproject(viewport, ConvertDX.FromMatrix4d(projection), ConvertDX.FromMatrix4d(view), ConvertDX.FromMatrix4d(world));
Viewport2d vp = ConvertDX.ToViewport2d((Microsoft.DirectX.Direct3D.Viewport)viewport);
// Convert from viewport coordinates
this.X = (this.X - vp.X) / vp.Width;
this.Y = (vp.Height + vp.Y - this.Y) / vp.Height;
// Make x/y range from -1 to 1
this.X = this.X * 2.0 - 1.0;
this.Y = this.Y * 2.0 - 1.0;
Matrix4d m = Matrix4d.Invert(world * view * projection);
double w = 1.0;
MultiplyMatrix(m, ref w);
this.X /= w;
this.Y /= w;
this.Z /= w;
}
