GLR example glrduck

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UNFORTUNATELY, The IRIX 6.2 GLR library is not available at this time.

We hope to have inst images available with the v6.2 DT releasing at the end of this calendar year. Please stay tuned to the location:
https://www.sgi.com/toolbox/src/exampleCode/opengl/GLR/
Once we have the software onboard, we'll indicate its presence and location on this page.

GLR - an OpenGL Render Server Facility. Please see the GLR section in the OpenGL documents tree for more information on GLR.

Glrduck

is a rehash of the GLR example program glrduckpond.c++ using ViewKit and Open Inventor. The main difference being glrduck creates a sub-class of the SoXtRenderArea called SoXtGLRRenderArea.

REQUIRED LIBS:

1. OpenInventor 2.1 or 2.1.1
2. ViewKit
3. OpenGL

FILES:

Makefile:		SGI compliant makefile.
main.C:			main.
SoXtGLRRenderArea.C:	SoXtRenderArea derived class source file.
SoXtGLRRenderArea.h:	SoXtRenderArea derived class header file.
glrduck.C:		VkApp derived class source file.
glrduck.h:		VkApp derived class header file.
Glrduck:		Xt resource file.
duck.iv:		Inventor graphics file of duck.

The SoXtGLRRenderArea class provides the connection to GLR. It handles the GLR initialization and drawing. The initialization of GLR is done in the class constructor. If a connection cannot be made then glrduck prints an error message a uses local rendering hardware. The public drawing method takes a flag to determine whether rendering should be local or GLR remote.

THINGS TO WATCH FOR:

This version glrduck tries to acquire an RGB canvas type. If this is changed to something other than RGB then the image pointer array size must be changed. (e.g. RGBA then new GLubyte[size[0] * size[1] * 4]; )

Before rendering to the remote hardware private render method "renderRemote()" invalidates the Inventor cache. See: (getGLRenderAction()->invalidateState();)

WHAT PLATFORMS AND OPERATING SYSTEMS ARE SUPPORTED?

You may use GLR with any SGI workstation running IRIX 5.3 or higher. While the render server can run on any SGI workstation, including low-end machines, it's preferable that it be run on a high-end machine (e.g. RealityEngine).

I have tested glrduck on an Indigo 2 running both IRIX 5.3 and Beta IRIX6.2, using a RealityEngine running IRIX 5.3 as the GLR server.

IMPORTANT:

When the glrmanager is running on a machine, the display is unusable for anything else.