Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- modellingcomponents:elements:kinematics [2018/09/21 09:13] – [CoordinateSystem] oliver
+++ modellingcomponents:elements:kinematics [2018/09/21 11:17] – [CoordinateSystem] oliver
@@ Zeile 1: / Zeile 1: @@
 ======CoordinateSystem======
-This element defines a cartesian coordinate system, based on two given vectors using crossproducts, or by rotating a reference coordinate system by given angles about its axes. The element creates a trajectory with the name of the element and the type of a 3d-Vector of double values.
+This element mostly is used to define a cartesian coordinate system, based on two given vectors using crossproducts, or by rotating a reference coordinate system by given angles about its axes. The element creates a trajectory with the name of the element and the type of a 3d-Vector of double values.
 The given FirstAxis stays as first axis. The cross product between DefiningVector and the vector defined by FirstAxis defines the second axis. The third axis is defined by the cross product between the first axis and the second axis. This behavoir corresponds to Vicons BodyBuilder!
+The element can be used to create coordinate systems also by other ways, e.g. by rotating a given coordinate system around an axis. Also non orthogonal axes systems can be defined or a calibration can be used to fix a coordinate system on a given one.
@@ Zeile 21: / Zeile 21: @@
 ^ coordinateSystem | | If the attribute coordinatesSystem ist used, this coordinate system is defined by a rotation about the RotAxis by RotAngle of the coordinate system set by the coordinateSystem attribue. If you want to rotate about a axis of the given coordinate system use e.g. <name>_X for a rotation about the x axis. If you want to define the coordinate system by a sequence of two or three rotations use the attribute EulerCardanAngles. (Vielleicht sollte diese Element besser wieder eliminiert werden. Besser alternativ das Element ForwardFrame verwenden.) | No |
 ^ RotAxis | | Axis to rotate the three axes of the given coordinate system to determine a new one. | No |
-^ RotAngle | | Angle in degree to rotation the given coordinaten system around the given axis to determine a new coordinate system. | No |
+^ RotAngle | | Angle in degree to rotation the given coordinaten system around the given axis to determine a new coordinate system. Use the right-hand-rule. If the rotation axis show in direction of the thumb of the right hand, the direction of your fingers shows in direction of positive angles. | No |
 ^ EulerCardanAngles | | If the attribute coordinatesSystem ist set the coordinate system can be defined by a sequence of three rotations about the axes of this coordinate system. The needed three angles are defined as mathematical formula defining a 3d vector, e.g. "vec(10.0,0.0,0.0) for defining a one step rotation about the first axis.  The sequence of the corresponding axes is defined by the attribute orientation. If only one or two rotations are needed you can set the other angles to 0. (Die Syntax in unglücklich, da die Winkel keinen Vektor bilden. Schöner wäre es die Einzelkomponenten mit einzelnen Attributen zu setzen! Vielleicht sollte diese Element besser wieder eliminiert werden. Besser alternativ das Element ForwardFrame verwenden.) | No |
 ^ average | | Additional calculation of the trial average. The value is saved as a parameter with the name of the element and "Average" as a suffix: <name of the element>Average | No |