README : Ted Wetherbee  2016jul09

Version: srend0.1

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Spherical Volume Rendering of Cartesian Grid Data (Srend)

Srend uses ray casting on ordinary CPU cores to render Cartesian grid
data to imagery.  Srend compiles to a library which is linked within
an application.  Computational fluid dynamics codes for weather, 
astrophysical, and multiphysics time-evolving simulations are the 
original application targets, but any Cartesian grid data is suitable.

Srend is written in standard Fortran.  Srend can be used within
Fortran, C/C++, and Python applications.

Scalability is a core feature, from serial laptop codes to 
applications exploiting the largest academic clusters.  Paralellism is
available through standard MPI, Openmp, and CPU vectorization methods
using GNU/Linux compilers and MPI libraries.

Portability is another key feature.  Srend has no hardware or 
software dependencies.  Vectorization is enabled through high level
compiler directives, and Srend code exploits capabilities of 
512-bit vector processing units (VPUs).  Srend will exploit narrower 
VPUs as determined by the compiler during build.

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Included source files:
  Srend.F90
  sleep.c
  srend_tile_montage.F90
  
Included test program source files:
  t_smp.F90
  t_mpi.F90
  t_mpi_4R_1F.F90
  t_mpi_4R_2C_1F.F90
  t_AMRsmp.F90
  t_AMRmpi.F90
               
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LICENSE for srend.F90 and srend_tile_montage.F90 (Expat):

! Copyright (c) 2016 Ted Wetherbee
!
! Permission is hereby granted, free of charge, to any person 
! obtaining a copy of this software and associated documentation files 
! (the "Software"), to deal in the Software without restriction, 
! including without limitation the rights to use, copy, modify, merge,
! publish, distribute, sublicense, and/or sell copies of the Software,
! and to permit persons to whom the Software is furnished to do so, 
! subject to the following conditions:
!
! The above copyright notice and this permission notice shall be
! included in all copies or substantial portions of the Software.
!
! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
! EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
! MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
! NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
! BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
! ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
! CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
! SOFTWARE.

LICENSE for test files with the "t_" prefix and sleep.c 
(Public Domain/"unlicense"):

! This is free and unencumbered software released into the public domain.
!
! Anyone is free to copy, modify, publish, use, compile, sell, or 
! distribute this software, either in source code form or as a compiled 
! binary, for any purpose, commercial or non-commercial, and by any 
! means.
!
! In jurisdictions that recognize copyright laws, the author or authors 
! of this software dedicate any and all copyright interest in the 
! software to the public domain. We make this dedication for the benefit 
! of the public at large and to the detriment of our heirs and 
! successors. We intend this dedication to be an overt act of 
! relinquishment in perpetuity of all present and future rights to this 
! software under copyright law.
!
! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
! EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
! MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
! IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR 
! OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
! ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
! OTHER DEALINGS IN THE SOFTWARE.
!
! For more information, please refer to http://unlicense.org/

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NOTE:

The test files with the "t_" prefix demonstrate how Srend can be used.
These generate data within to exercise features and suggest how Srend
might be incorporated within an application, and they are meant to
be modified or picked apart without any restiction.

