3.3.1. Distance
This allows the user to measure the distance between two points or geometries. Therefore, Point and Edge, Face, Solid are supported as the selection types.
3.3.1.1. Point Type
The relative distance between two points can be calculated by using the Point type. The distance is calculated as the magnitude of the displacement vector which is defined from the first point to the second point with respect to the reference frame. If the user does not specify a reference frame, it is referred to Inertia Marker of Ground.
Figure 3.2 Definition of Distance [Point type]
Displacement: As shown in Figure 3.2, the relative displacement can be computed as follows.
\(d_{12}^{{}}={{(AC)}^{T}}({{r}_{2}}-{{r}_{1}})\)
Where \(A\) and \(C\) are the orientation matrices of the body reference frame and the marker reference frame of the specified reference frame.
Distance: Shows the distance between the 1st point and the 2nd point.
\(d=\left\| d_{12}^{{}} \right\|\)
Figure 3.3 Distance dialog box [Point type]
Point type
First Point: Inputs X, Y, and Z position of the first point to measure the relative displacement and distance.
Second Point: Inputs X, Y, and Z position of the second point to measure the relative displacement and distance.
Reference Frame: Inputs a reference frame to measure the relative displacement. If the user does not specify it, the default is Inertia Marker of Ground.
Result
Displacement: Shows the calculated displacement vector components between the first point and the second point with respect to Reference Frame.
Distance: Shows the calculated distance between the first point and the second point.
First Point: Shows X, Y, and Z position of the start point of the displacement vector with respect to the Reference Frame.
Mid Point: Shows X, Y, and Z position of the middle point of the displacement vector with respect to the Reference Frame.
Second Point: Shows X, Y, and Z position of the endpoint of the displacement vector with respect to the Reference Frame.
Preview: Shows First Point, Mid Point, and Second Point in the Working Window.
Figure 3.4 Preview First, Mid, and Second Point of Distance
Step to Calculate a Distance between Two Markers
Select Point type option.
Specify First Point.
Specify Second Point.
Specify Reference Frame.
Click Calculate.
3.3.1.2. Edge, Face, Solid Type
It can be calculated for the minimum distance between two geometries.
Figure 3.5 Definition of Distance [Edge, Face, Solid type]
Figure 3.6 Distance dialog box [Edge, Face, Solid type]
Edge, Face, Solid type
First Entity: Inputs the name of a first entity such as an edge, a face, or a solid geometry to measure the minimum distance.
Second Entity: Inputs the name of a second entity such as an edge, a face, or a solid geometry to measure the minimum distance.
Reference Frame: Inputs a reference frame to measure the relative displacement. If the user does not specify it, the default is Inertia Marker of Ground.
Result
Displacement: Shows the calculated displacement vector components for the minimum distance between two geometric entities with respect to Reference Frame.
Distance: Shows the minimum distance between the first entity and the second entity.
First Point: Shows X, Y, and Z position of the start point of the displacement vector with respect to the Reference Frame.
Mid Point: Shows X, Y, and Z position of the middle point of the displacement vector with respect to the Reference Frame.
Second Point: Shows X, Y, and Z position of the endpoint of the displacement vector with respect to the Reference Frame.
Preview: Shows First Point, Mid Point, and Second Point in the Working Window.
Figure 3.7 Preview First, Mid, and Second Point of Distance [Edge, Face, Solid Type]
Step to calculate Distance between Two Geometries
Select Edge, Face, Solid type option.
Specify First Entity.
Specify Second Entity.
Specify Reference Frame.
Click Calculate.