GDDM-GKS V1R1 Programming Guide and Reference
GDDM-GKS V1R1 Programming Guide and Reference
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GSSGT GDDM-GKS V1R1 Programming Guide and Reference SC33-0334-00 |
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Purpose
Function: To set segment transformation. Segment function. Assigns a predefined transformation to a segment. Parameters sgna (specified by user) (fullword integer)
m (specified by user) (array of short floating-point numbers)
Operating states WSOP, WSAC, SGOP Related functions Evaluate transformation matrix (GEVTM), Accumulate transformation matrix (GACTM), Create segment (GCRSG), Inquire segment attributes (GQSGA), Inquire dynamic modification of segment attributes (GQDSGA) Description This function applies segment transformation matrix m to segment sgna. The segment transformation matrix in the segment state list for the segment is set to the matrix m. Segment transformations scale, translate, and rotate the coordinates of the primitives in the displayed segment. You define the transformation values by calling Evaluate transformation matrix (GEVTM) or Accumulate transformation matrix (GACTM). Application of the transformation is not cumulative. It does not affect the contents of the segment. The transformation is always applied to the segment as originally created. Applying the same segment transformation more than once to the segment gives identical results. GSSGT transforms a segment stored on a workstation. It applies to all workstations where the segment is stored, even if they are not all active. When a segment transformation is set by this function, an implicit regeneration of the display may be required at workstations where the segment is displayed. If the implicit regeneration mode of a workstation is suppressed, you can call Redraw all segments on workstation (GRSGWK) to ensure a true representation of the graphics picture. Principal errors
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 Copyright IBM Corporation 1990, 2012 |
