Format

YAW(I, J)

Description

The YAW function computes the first angle, in radians, of a body-3 Yaw-Pitch-Roll rotation sequence.  Given two coordinate systems, I and J which are initially having the same orientation, this rotation sequence is defined as follows:

The first argument, marker I, must be specified.  The second argument, marker J, is optional.

Example

<Post_Request

    comment  = "Vehicle Orientation (degrees)"

    id       = "70000256"

    type     = "EXPRESSION"

    expr1    = "NULL"

  expr2    = "YAW(30301010,30101010)*RTOD"

    expr3    = "PITCH(30301010,30101010)*RTOD"

    expr4    = "ROLL(30301010,30101010)*RTOD"

/>

Arguments

I

The marker whose rotational displacement is to be computed.

J

The marker with respect to which the rotational displacement is to be computed. This argument is optional.  If omitted, it defaults to the ground coordinate system.

Comments

The figure below shows the physical meaning of the Yaw-Pitch-Roll rotation sequence.