PSBRFM(3g) — Subroutines

Name

PSBRFM − Sets the back reflectance model for displaying back-facing portions of area primitives.

Operating States: PHOP, ∗, STOP, ∗
PHIGS PLUS function
Creates a structure element

Old Syntax

DSBIRE (BREFM)

Argument Data Type Access Description
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BREFM Integer Read Back reflectance model
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New Syntax

PSBRFM (RFM)

Argument Data Type Access Description
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RFM Integer Read Back reflectance model
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Constants

Defined Argument      Constant      Description
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RFM                   PNORM         Digital PHIGS performs no reflectance
                                    calculation.
                      PARM          Digital PHIGS produces ambient
                                    reflectance effects.
                      PADRM         Digital PHIGS produces ambient and
                                    diffuse reflectance effects.
                      PADSRM        Digital PHIGS produces ambient, diffuse,
                                    and specular reflectance effects.
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Description

PSBRFM sets the back reflectance model Digital PHIGS uses to display back-facing portions of area primitives. 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 set back reflectance model element.

During structure traversal, Digital PHIGS sets the current back reflectance model entry in the PHIGS traversal state list to the value associated with the element. When the current back reflectance model ASF entry in the traversal state list is INDIVIDUAL, Digital PHIGS uses this value to display back-facing portions of subsequent area primitives. If the specified back reflectance model value is not available on a workstation, Digital PHIGS uses value 1.

If Digital PHIGS is in immediate mode, it performs this function immediately, but the function does not create a structure element.

The new function syntax conforms to the ISO Fortran standard. Digital recommends that you code using the new function syntax.