HP Visualize c200/c240 hp workstations - hp-ux 10.20 graphics administration g - Page 105

Texture Mapping, x_Rel_Notes

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Other features are available (listed as "Factors Affecting Performance:") but should be used with discretion as performance is significantly slower if even one of these features is used Note: The following tables were complete and accurate as of the date of publication of this document. Updates to the table, if any are necessary, will be included in the on-line release notes for the current release. See the 10.x_Rel_Notes file in the following directories: /opt/graphics/PEX5/newconfig/opt/graphics/PEX5 /opt/graphics/phigs/newconfig/opt/graphics/phigs /opt/graphics/starbase/newconfig/opt/graphics/starbase Texture Mapping When the texture-mapping hardware is present, it is used completely, except for the following cases, which bypass the geometry accelerator hardware but continue to use other texture-mapping hardware acceleration: • Using more than 8 lights • Backface distinguishing • Facet alpha Texture-mapping hardware acceleration is completely bypassed when the following texture conditions exist: • Multiple textures per primitive (PEX) • Texture maps with more than 32K texels per side (Starbase, PEX) • No texture-mapping hardware installed (Starbase, PEX) • Prelight texturing with DECAL mode on (PEX) • Prelight texturing with replace mode on and boundary condition absolute (external to the texture boundary is the original primitive color) (PEX) • Starbase DECAL and the texture does not have ALPHA in it. (Starbase) You can also resort to software texturing when you run into texture-memory space limitations or run out of texture IDs. Page 105 Graphics Administration Guide for HP-UX 10.20

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Other features are available (listed as "Factors Affecting Performance:") but should be used with
discretion as performance is significantly slower if even one of these features is used.
____________________________________________________________________________________
Note:
The following tables were complete and accurate as of the date of publication of this document.
Updates to the table, if any are necessary, will be included in the on-line release notes for the current
release. See the
10.x_Rel_Notes
file in the following directories:
/opt/graphics/PEX5/newconfig/opt/graphics/PEX5
/opt/graphics/phigs/newconfig/opt/graphics/phigs
/opt/graphics/starbase/newconfig/opt/graphics/starbase
____________________________________________________________________________________
Texture Mapping
When the texture-mapping hardware is present, it is used completely, except for the following cases,
which bypass the geometry accelerator hardware but continue to use other texture-mapping hardware
acceleration:
•
Using more than 8 lights
•
Backface distinguishing
•
Facet alpha
Texture-mapping hardware acceleration is completely bypassed when the following texture conditions
exist:
•
Multiple textures per primitive (PEX)
•
Texture maps with more than 32K texels per side (Starbase, PEX)
•
No texture-mapping hardware installed (Starbase, PEX)
•
Prelight texturing with DECAL mode on (PEX)
•
Prelight texturing with replace mode on and boundary condition absolute (external to the texture
boundary is the original primitive color) (PEX)
•
Starbase DECAL and the texture does not have ALPHA in it. (Starbase)
You can also resort to software texturing when you run into texture-memory space limitations or run out
of texture IDs.
Graphics Administration Guide for HP-UX 10.20
Page 105