/SKEW/MOV
Block Format Keyword Describes a moving local coordinate system.
Format
(1)  (2)  (3)  (4)  (5)  (6)  (7)  (8)  (9)  (10) 

/SKEW/MOV/skew_ID  
skew_title  
node_ID_{1}  node_ID_{2}  node_ID_{3}  Dir 
Definitions
Field  Contents  SI Unit Example 

skew_ID  Skew identifier (Integer, maximum 10 digits) 

skew_title  Skew title (Character, maximum 100 characters) 

node_ID_{1}  Node identifier N_{1} (Integer) 

node_ID_{2}  Node identifier N_{2} (Integer) 

node_ID_{3}  Node identifier N_{3} (Integer) 

Dir 
Default = X (Text) 
Comments
 Moving skew defines a local coordinate system, defined by three nodes. At each time, the actual orientation of the skew is recalculated according to the actual position of these nodes.
 For moving skews, the skew system is moving and is defined by node identifiers
node_ID_{1}, node_ID_{2} and node_ID_{3}.The axis definition depends on the input for Dir.
 When Dir=X
node_ID_{1} amd node_ID_{2} define $X\text{'}$
node_ID_{1} and node_ID_{3} define $Y"$ $Z\text{\'}=X\text{\'}\Lambda Y"$
 $Y\text{'}={Z}^{\prime}\Lambda {X}^{\prime}$
 When Dir=Y
node_ID_{1} and node_ID_{2} define $Y\text{'}$
node_ID_{1} and node_ID_{3} define $Z"$ $X\text{'}={Z}^{\u2033}\Lambda {Y}^{\prime}$
 $Z\text{'}={X}^{\prime}\Lambda {Y}^{\prime}$
 Case Dir=Z
node_ID_{1} and node_ID_{2} define $Z\text{'}$
node_ID_{1} and node_ID_{3} define $X"$ ${Y}^{\prime}={X}^{\u2033}\Lambda {Z}^{\prime}$
 ${X}^{\prime}={Y}^{\prime}\Lambda {Z}^{\prime}$
The skew is defined by $X\text{'}$ , $Y\text{'}$ and $Z\text{'}$
 When Dir=X
 When defining some conditions with respect to the skew in cylindrical coordinate system, the axis of the cylindrical coordinate system is assumed to pass through node N1.