ex - use fewer q_extra in dmswarm tests

swarm - use diagonal assembly in BPSSwarm

petsc - min PETSc version 3.21

Drop JiT Guards in Most QF Source (#1540)

* backend - use pragma once

* gallery - drop source header guards

* ex - drop some qfunction source header guards

* fluids - drop guards on all sin

Drop JiT Guards in Most QF Source (#1540)

* backend - use pragma once

* gallery - drop source header guards

* ex - drop some qfunction source header guards

* fluids - drop guards on all singly included headers

* jit - drop most guards on backend JiT files

* sycl - drop extra header guards

* jit - enable #pragma once for QF source

* fluids - use #pragma once for util/helper qf source

* test - check different multiple includes

* fluids - fix odd include

* jit - update interface for building JiT string from multiple files

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ex - enable int64 testing for PETSc examples, small fixes for compatibility

minor - update copyright headers

ex - use #pragma once in examples

test: Fix test name for PETSc bps

style - fix trailing spaces in non-linted files

Fix initialization of point locations

* Change cell_random to use built-in DMSwarm function

* Ensure uniform point distribution is uniform across cell boundaries

* Fix total number of points in pa

Fix initialization of point locations

* Change cell_random to use built-in DMSwarm function

* Ensure uniform point distribution is uniform across cell boundaries

* Fix total number of points in parallel

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Add BP tests for integration at arbitrary points

Add BPs with integration at arbitrary points

Make file comments and PetscFunctionBegin/Return spacing consistent (#1413)

Update PETSc examples to use VecP2C and VecC2P (#1412)

Update petsc-dmswarm example to use CeedOperatorAtPoints (#1411)

* Update petsc-dmswarm example to use CeedOperatorAtPoints

* Change mass operator to use geometric data

* Clean up DMSwarmCeedC

Update petsc-dmswarm example to use CeedOperatorAtPoints (#1411)

* Update petsc-dmswarm example to use CeedOperatorAtPoints

* Change mass operator to use geometric data

* Clean up DMSwarmCeedContext

* Refactor core swarm functions

* Comment indentation cleanup

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Plex project coord renamed (#1391)

* fixing ProjectCoordinates

* copy of Ratel fix

* set for future, preserve backward

* break out versions

* PETSc is actually at 3.20 not 3.21 so decrem

Plex project coord renamed (#1391)

* fixing ProjectCoordinates

* copy of Ratel fix

* set for future, preserve backward

* break out versions

* PETSc is actually at 3.20 not 3.21 so decremment the minor version switch

* fixed style and copied same to solids and petsc examples (thought they have lots of other compile warnings)

* blank line

* Breaking again with compounded versions

* Update remaining DMPlexProjectCoordinates

* ex - update DMPlexCreateCoordinateSpace

* cx - update ICC/IFORT job

---------

Co-authored-by: Jed Brown <jed@jedbrown.org>
Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

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ex - require latest PETSc release

DMSwarm Example with Interpolation and Projection (#1284)

* petsc - initial DMSwarm example

* swarm - links and runs

* swarm - fixed default box dims

* swarm - clearer error messages

* s

DMSwarm Example with Interpolation and Projection (#1284)

* petsc - initial DMSwarm example

* swarm - links and runs

* swarm - fixed default box dims

* swarm - clearer error messages

* swarm - clearer background mesh setup requirements

* swarm - Tensor bad :(

* Fix inequality direction for verification

* swarm - add viewing command

* swarm - DMSwarmPICField_coor

* swarm - DMSwarmGetCellDM

* swarm - dm_plex_hash_location true

* fix coordinate ordering

* "working" two-way projection

* libceed mostly correct, off by a permutation or something

* add tolerance parameter and make test succeed

* Use DMProjectFunction to support high-order bases

* minor clarity change

* prefer PetscPrintf over printf

* consistency

* minor - make uniform vs sin distributed points cl option

* fix VLA declaration

* minor reorganizing

* swarm value check in separate fn

* minor reorg and rename

* style

* separate interpolate logic into its own fns

* consistency

* fix error message

* woops, use field name arg

* improve indexing, switch to uniform for test

* fix multiple comp

* drop unused function

* draft documentation

* style

* Update PETSc style documentation

Co-authored-by: Zach Atkins <zach.atkins@colorado.edu>

* Update examples/petsc/dmswarm.c

* add create/destroy for ceed ctx object

* use libCEED rstr

* add P2C/C2P utils

* minor simplifications

* add projection swarm to mesh

* minor

* update gitignore

* add gauss point locations, lumped comparison

* simplify uniform/gauss coords logic

* fix segfault

* drop comparison - can replicate with CL options

* add polynomial target option

* minor tidying

* revert accidental change

* lumped test

* update tolerance option description

Co-authored-by: Zach Atkins <zach.atkins@colorado.edu>

* add points_per_cell option

* Fix siliness by Jeremy

Co-authored-by: Zach Atkins <zach.atkins@colorado.edu>

* fix scoping and logic

* style

* discontinuous sphere target

* add cellwise random swarm

---------

Co-authored-by: Zach Atkins <zach.atkins@colorado.edu>

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minor - spelling is hard

interface - rename CEED_BASIS_COLLOCATED to CEED_BASIS_NONE

minor - test case name can be human-readable now

Fix empty initializer braces compiler warnings

Remove some trailing semicolons from function definitions to silence compiler warnings

examples: Use PetscFunctionReturn in PETSC_SUCCESS

examples/petsc: Remove unneeded PETSC_VERSION_LT

- We now require greater than 3.19 anyways

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>