View Parameters
This window appears when the user hovers the mouse on the View parameters button in the top toolbar. If you click on the button the little window remain visible.
Here the user can customize advanced parameters of the current view.
This window allows you to control how the “virtual eye” sees the 3D scene with all your models. There are two viewing mode: the perspective mode (shown on the left image) and the orthographic mode (on the right image).
Perspective projection
In perspective mode, the virtual eye uses a perspective projection to see the scene, and you can set the amplitude of the projection by specifying the “Vertical FOV” (field of view) in degrees. Decreasing (increasing) the field of view is equivalent to zooming in (out) with the objective lens of a camera.
Orthographic projection
In orthographic mode, you see the 3D scene through an orthographic projection, and you can specify the “vertical size” in meters of your projection.
Cut planes
Near plane: distance of near clipping plane in meters. Specifies the minimum rendered depth. In perspective mode only values greater than zero are allowed.
Far plane: distance of far clipping plane in meters. Specifies the maximum rendered depth. Must be greater than Near plane.
To optimize the depth accuracy try to keep these values as close as possible to the desired scene depth range. If your model's bounding box is 100 x 100 x 100 m, it is not useful to adopt a far plane of hundreds of kilometers.
Auto Adjust
If flagged, near and far plane are automatically computed, based on the distance between camera and pivot: the near plane is set at 1/100 and the far plane is set at 50 times the camera-pivot distance. It only applies to perspective mode.
You can save the current settings by the Place here a survey point function.