This facility may be used to generate nodes by reflecting nodes already input in a specified plane.

      2   5  7    11    16    21        31        41        51
    - --- -- ---- ----- ----- --------- --------- --------- ---------
    M|END|  | 101| XXXX|  100|  1.0    |   1.0   |   2.0   |  15.0   |
    - --- -- ---- ----- ----- --------- --------- --------- ---------
    |  |  |    |           |      |        |         |         |
    |  |  |    |           |      |-----------------------------
    |  |  |    |           |      |
    |  |  |    |           |      |_(4)4 Co-efficients to define equation
    |  |  |    |           |           of mirror plane (4F10.0)
    |  |  |    |           |
    |  |  |    |           |_(3)Increment for each set of Node Numbers(I5)
    |  |  |    |
    |  |  |    |_(2)The User node number of the 1st node in a set.
    |  |  |
    |  |  |_Optional User Identifier(A2)
    |  |
    |  |_Compulsory END on last data record in data category
    |
    |_(1)Indicates Mirror Node Generation

(1) This single letter code indicates that a set of nodes is to be generated by reflecting a set of nodes already input.

(2) This is the starting node of the set to be copied (input sequence = NS1). The finish node of the set is the last node input so far (input sequence = NF1). The number of nodes generated will always be (NF1-NS1+1).

(3) This node increment number (N3) is the number by which the node numbers already input are to be incremented. In other words, if the nodes previously input are numbered NP1, NP2, NP3, etc., and the new node numbers are NN1, NN2, NN3, etc., these new node numbers are given by:

NN1 = NP1 + N3; NN2 = NP2 + N3; NN3 = NP3 + N3; etc.

If no increment value is present, or zero is input, the program will issue a warning and default to a value of 100.

(4) These are the co-efficients A, B, C, D which define the plane of reflection. The plane is defined by the equation:

Ax + By + Cz = D