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Volren

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	Volren is a hardware accelerated volume renderer based upon
the texture mapping capabilities available in Silicon Graphics' Onyx
Reality Engine architecture.  The renderer provides the ability to
control the mapping from scalar data value to color and opacity as
well as the ability to render voxel and geometric data together.  The
renderer loads data as a collection of 2D image files in one of many
formats.


Building
--------

	Building the OpenGL or IrisGL version of volren 6.0 entails
only a few steps.  First, from this directory set up things to build
either IrisGL or OpenGL for either Impact, Reality Engine or Infinite
Reality.  You can do this by editting the Makefile line:

FLAGS           =       -DDEBUG -DVR_OPENGL -DVR_IMPACT

To generate an OpenGL executable add the flag -DVR_OPENGL.  For IrisGL
(not recommended with volren version 6.0) use the flag -DVR_IRISGL.
The three architectures and their corresponding flags are listed in
the table below:

	Architecture		Flag

	Indigo2 Impact		-DVR_IMPACT
	Onyx Reality Engine	-DVR_VENICE
	Onyx Infinite Reality	-DVR_KONA

	After setting up these flags, you should build the executable
and man pages.  To do this, type:

	$ make clean depend all

	This should result in a 'volren' executable for the
appropriate architecture!
