# ./README_hp700

    *
    * README for IBM Visualization Data Explorer for HP
    *
    *
    *

    The information contained in this file consists of hints for using the
    system, help with functions that may not be apparent, and last minute updates
    to the existing documentation.  It is advisable to review this file any time
    Data Explorer updates are applied.

    ========================================================================

    CONTENTS

        To go directly to an item, search for the item number beginning
        at the left margin.

        1. System Configuration
            A. Colormap Considerations
            B. Default Keyboard Mappings
            C. DX no longer statically links libC
        2. Hardware Rendering Considerations
            A. Shared Library Support for Hardware Rendering
            B. Hardware Rendering Not Available Message
            C. Shared Memory Usage
            D. The CRX Adapter and Direct Interactors
            E. Resizing in Script Mode
            F. Near Clipping in Perspective Mode
            G. Z-buffer

    ========================================================================

    1. System Configuration

    A. Colormap Considerations
    If you are using a workstation with a CRX adapter, you can reduce the
    visual effect of colormap thrashing by setting the environment variable
    SB_X_SHARED_CMAP to TRUE so that X and Starbase will use a shared
    colormap.

    If you are using x11start, make sure you set this environment variable
    before you issue the x11start command.

    If you are using the HP VUE (Visual User Environment) add the following
    to the end of the Xconfig file:

       vuelogin*environment:SB_X_SHARED_CMAP=TRUE

    The Xconfig file is located in /usr/vue/config/Xconfig for HP/UX 9.0x.

    This will effectively make the first 8 colormap cells accessible
    (read/only) to both X and StarBase, reserve the next 34 cells for X,
    and set aside the remaining 214 for StarBase.

    Since there are relatively few colors available to X, it is possible
    that you will get color map allocation errors when invoking Data
    Explorer, especially if you use the HP VUE, as it can require all
    42 colors reserved for X, depending on the settings of the following
    resources:

      *colorUse
      *shadowPixmaps

    The *colorUse resource determines the number of color sets available in
    the current HP VUE color palette, whereas the shadowPixmaps determines
    whether shadowing is done with colors or pixmaps.

    For HP/UX 9.0x, color usage is reduced in HP VUE by cascading up from the
    'Tool Box' icon, and selecting the following icons in order:

            General
            System_admin
            EditResources

    Edit the file provided in the last window to include

    *ColorUse: LOW_COLOR
    *ShadowPixmaps: TRUE

    You will then need to log out from the console and log back in for
    these new resources to take effect.

    B. Default Keyboard Mappings On the Hewlett Packard 9000/700 series
    workstations, the Delete key is marked "Del", and is found on the
    numeric keypad.

    C. DX no longer statically links libC
    Data Explorer no longer statically links in libC on hp systems.
    This may be a problem on older hp systems (9.x) where the libC runtime library
    was not installed by default. However, this library was on
    the original distribution so you should have a copy you
    can install.

    2. Hardware Rendering Considerations

    A. Shared Library Support for Hardware Rendering
    When hardware rendering is requested for the first time, the executive
    dynamically loads /usr/local/dx/bin_hp700/DXhwdd.sl and the StarBase shared
    libraries.  If one of these is not present then hardware rendering will
    be disabled.

    B. Hardware Rendering Not Available Message
    When the message 'Hardware rendering not available: /usr/lib/libsb.sl not
    found' appears, then StarBase shared library or run-time support has
    not been installed.

    C. Shared Memory Usage
    The hardware rendering software uses shared memory segments.  If Data
    Explorer exits abnormally after beginning hardware rendering, then these
    shared memory segments may not be properly deallocated.  Use the 'ipcs'
    command to see if this has happened and use the 'ipcrm' command to remove
    them.  If these are not removed they may hamper subsequent executions.

    D. The CRX Adapter and Direct Interactors
    When using the direct interactors and hardware rendering on a CRX graphics
    card, zoom boxes and probe points may cause minor image corruption while the
    mouse button is depressed.  When the mouse button is released, the proper
    image is generated.

    E. Resizing in Script Mode
    For script mode and hardware rendering, an open or resize of the display
    window might produce a Starbase error.

    F. Near Clipping in Perspective Projections
    When navigating into an object, the near clip plane may clip graphics
    primitives to their triangle boundaries instead of the exact intersection
    with the clip plane.

    G. Z-buffer
    Hardware rendering may be performed on a system without a z-buffer card
    if PowerShade is installed on that system.
    ----------------------------------------------------------------------

    The following trademarks apply to this information:

    IBM is a registered trademark of International Business Machines Corporation.
    IBM Visualization Data Explorer is a trademark of International
        Business Machines Corporation.
    HP, Starbase and PowerShade are registered trademarks of Hewlett-Packard
        Company.
    HP-UX and HP VUE are registered trademarks of Hewlett-Packard Company.