/// <summary>
/// Gets normalized world space line from screen space coordinates.
/// </summary>
/// <param name="screenCoords"></param>
/// <returns></returns>
public LineD WorldLineFromScreen(Vector2 screenCoords)
{
var matViewProjInv = MatrixD.Invert(ViewProjectionMatrix);
// normalized screen space vector
var raySource = new Vector4D(
(2.0f * screenCoords.X) / Viewport.Width - 1.0f,
1.0f - (2.0f * screenCoords.Y) / Viewport.Height,
0.0f,
1.0f
);
var rayTarget = new Vector4D(
(2.0f * screenCoords.X) / Viewport.Width - 1.0f,
1.0f - (2.0f * screenCoords.Y) / Viewport.Height,
1.0f,
1.0f
);
var raySourceWorld = Vector4D.Transform(raySource, matViewProjInv);
var rayTargetWorld = Vector4D.Transform(rayTarget, matViewProjInv);
raySourceWorld /= raySourceWorld.W;
rayTargetWorld /= rayTargetWorld.W;
return(new LineD(new Vector3D(raySourceWorld), new Vector3D(rayTargetWorld)));
}
private void UpdatePropertiesInternal(MatrixD newViewMatrix)
{
ViewMatrix = newViewMatrix;
MatrixD.Invert(ref ViewMatrix, out WorldMatrix);
// Projection matrix according to zoom level
ProjectionMatrix = MatrixD.CreatePerspectiveFieldOfView(FovWithZoom, AspectRatio,
GetSafeNear(),
FarPlaneDistance);
ProjectionMatrixFar = MatrixD.CreatePerspectiveFieldOfView(FovWithZoom, AspectRatio,
GetSafeNear(),
1000000);
ViewProjectionMatrix = ViewMatrix * ProjectionMatrix;
ViewProjectionMatrixFar = ViewMatrix * ProjectionMatrixFar;
// Projection matrix according to zoom level
// float near = System.Math.Min(NearPlaneDistance, NearForNearObjects); //minimum cockpit distance
// ProjectionMatrixForNearObjects = MatrixD.CreatePerspectiveFieldOfView(FovWithZoomForNearObjects, ForwardAspectRatio,
// near,
// FarForNearObjects);
UpdateBoundingFrustum();
}