Starbase Functionality

Commands Not Supported

The following commands are ignored on the hp98704 device driver:

alpha_transparency           light_model
backface_control             light_source
bf_alpha_transparency        light_switch
bf_control                   line_filter
bf_fill_color                perimeter_filter
bf_interior_style            set_capping_planes
bf_perimeter_color           set_model_clip_indicator
bf_perimeter_repeat_length   set_model_clip_volume
bf_perimeter_type            shade_range
bf_surface_coefficients      surface_coefficients
bf_surface_model             surface_model
bf_texture_index             texture_index
contour_enable               texture_viewport
define_contour_table         texture_window
define_texture               viewpoint
define_trimming_curve        zbuffer_switch
deformation_mode
depth_cue
depth_cue_color
depth_cue_range
hidden_surface
light_ambient
light_attenuation

The following commands are not supported on the hp98705 device driver:

alpha_transparency
bf_alpha_transparency
bf_texture_index
define_texture
line_filter
perimeter_filter
texture_index
texture_viewport
texture_window

Number of Light Sources

The hp98705 device driver supports up to 15 light sources.

Commands Conditionally Supported

The following commands are supported on the hp98704 device driver under the listed conditions:

block_read, block_write

The raw parameter for the block_read and block_write procedures is normally ignored by the hp98704 device driver. To use the raw mode, you must call the R_BIT_MODE gescape discussed in this manual.

pattern_ define

4x4 is the largest supported pattern.

shade_mode

The color map mode may be selected but shading can not be turned on text_precision. Only STROKE_TEXT precision is supported.

vertex_format

The use parameter must be zero, any extra coordinates supplied will be ignored.

with_data

The following routines are called with_data routines because they contain with_data in their routine names. These with_data routines are supported by the PersonalVRX graphics devices.

partial_polygon_with_data3d
polygon_with_data3d
polyhedron_with_data
polyline_with_data3d
polymarker_with_data3d
quadrilateral_mesh_with_data
triangle_strip_with_data

For detailed information on these routines, read the Starbase Reference. In some cases, you will be able to find the routines under their own name, but in other cases, you will need to use the first part of the routine name to locate these routines (e.g., polyline_with_data3d is described on the man page for polyline(3G)).

The following commands are supported on the hp98705 device driver under the listed conditions:

block_read, block_write

The raw parameter for the block_read and block_write procedures is normally ignored by the hp98705 device driver. To use the raw mode, you must call the R_BIT_MODE gescape discussed in this manual.

inquire_fb_ configuration

An HP 98705 device running the hp98705 device driver will report four image_banks, if 16 planes and dedicated Z-buffer are configured.




	NOTE: When the Z-buffer is installed in this way, Z-buffer access is possible through `block_write`, `block_read`, and `block_move`. The Z-buffer may be selected for read/write using `bank_switch` (see the section "Changes to `bank_switch()`" in Chapter 1). The Z-buffer may not be displayed. The graphics accelerator cannot render to the Z-buffer.

interior_ style

If the polygon fill type is INT_HATCH then the following functionality will not work correctly:

Hidden surface removal.
Shading and lighting.
Depth cueing.
Back-facing attributes and culling.
Splines, quadratic meshes, and triangle strips will not be hatched.




	NOTE: Performance is degraded when using the `INT_HATCH` mode.

text_ precision

Only STROKE_TEXT precision is supported.

Starbase Functionality

Technical documentation

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Commands Not Supported

Number of Light Sources

Commands Conditionally Supported