DLELP3(3g) — Subroutines
Name
DLELP3 − Specifies the 3D form of the unfilled ellipse primitive.
Operating States: PHOP, ∗, STOP, ∗
Digital PHIGS extension function
Creates a structure element
Syntax
DLELP3 (PX, PY, PZ, MAJORX, MAJORY, MAJORZ, MINORX, MINORY, MINORZ)
Argument Data Type Access Description
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PX, PY, PZ Real Read Center point of the ellipse, in
modeling coordinates
MAJORX, Real Read Vector that defines the x-axis
MAJORY
MAJORZ
MINORX, Real Read Vector that defines the y-axis
MINORY
MINORZ
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Description
DLELP3 specifies the three-dimensional form of the unfilled ellipse primitive. The ellipse local coordinate system is the xy-plane as defined in the modeling coordinate system.
Depending on the edit mode, this function either inserts the new structure element directly after the element indicated by the pointer or replaces the element indicated by the pointer. The pointer then points to the new unfilled ellipse 3 element.
During structure traversal, Digital PHIGS generates an unfilled ellipse. Digital PHIGS binds the current values of the polyline primitive as defined in the PHIGS traversal state list to the primitive, and renders it according to the current curve approximation criteria.
If the magnitudes of both axes are less than or equal to 0, Digital PHIGS displays a dot. If one of the axes is less than or equal to 0, Digital PHIGS displays a line of the correct magnitude. If the axes do not define the system (the vectors are parallel and nonzero), Digital PHIGS uses (1,0,0) for the major axis and (0,1,0) for the minor axis.
If Digital PHIGS is in immediate mode, it performs this function immediately, but the function does not create a structure element.
Digital PHIGS Version 3.1 does not support this function.
See Also
PADS
PQPLF
PRES
PSDCI
PSHRID
PSIASF
PSLN
PSLWSC
PSPKID
PSPLC
PSPLCI
PSPLI
PSPLSM
PSVWI