Name: Every control point can be given a name.
Index: The index of the control point. This setting cannot be changed, to reorder the control points, the “Up” and “Down” buttons can be used.
Time: The time at which the currently selected control point will be reached after the flight path is started. This parameter is calculated automatically and cannot be changed.
Scale: Changing the scale factor can be used to make the interpolated curve smoother (large value for scale) or more pointy (small value for scale). If too large a value is used for the scale, the interpolation may create large “detours” and loops.
The scale parameter is calculated automatically when the control point is created and should lead to a nice curve. If the control points are moved afterwards, they may be closer to each other or further apart than before.
If the positions are calculated with the “Automatic” setting, this parameter can be ignored.
Speed: The velocity an attached object will have when it passes this control point. This option is only available for flight paths with “Constant speed” disabled.
Position: The position of the currently selected control point; may be manually changed.
Rotation: The orientation of the control points frame vectors; may be manually changed.
In TerrainView™ it is possible to attach any object to a flight path. Furthermore, the camera can be attached to a flight path as well, and can be pointed at any other object that has been loaded, including any object currently flying along a different flight path.
Depending on the chosen orientation interpolation, attached objects will behave differently. In case of tangential orientation, the objects will be positioned in such a way, that their forward vector is aligned with the tangent to the interpolated curve, and their up vector lies in a plane that is perpendicular to the horizontal plane. If a quaternion spline has been chosen for the orientation interpolation, the object’s forward and up vectors will always be aligned with the green and blue arrows at the control points. Between the control points the orientation is smoothly interpolated.
The same holds for the camera – the viewing direction is always tangential to the curve, or aligned with the green arrow. The exception being the case where the camera looks at some other object. The “Look at”-setting overrides the interpolated orientations.
Name: Every attached object with the exception of the camera can be given a name.
File: The file name of the attached object (not applicable for attached camera).
Delay: This value defines the delay in seconds for the current object – if set to 3, for instance, the object will start moving 3 seconds after the flight path has been started. If several objects travel on the same flight path the delay setting can be used to let them move one after the other.
East, North, Alt: These values can be used to shift an object to a suitable position with respect to the flight path. For instance, if the origin of a car’s coordinate system is located at it’s exact geometric center, it can happen that it “sinks” halfway into the ground. By adjusting the “Alt” value of the offset, it can be “lifted” onto the ground. Note, that these three values are in meters (m)
RotX, RotY, RotZ: Some 3D models have local coordinate systems differing from TerrainView™’s own coordinate system. Therefore, it may be necessary to “pre-rotate” an object.
Scale: Some models are modeled with different units than the ones used in TerrainView™ and will appear extraordinarily large. It may be therefore necessary to change their scale.
Ground: Check this box if you want the attached object to follow the ground under the flight path.
Look At: Select an object which is already in the scene to look at. This is useful, if you want the camera to focus a specific object.