2.1.3

See #62

PyPI Release

pip install phiflow==2.1.3

2.1.2

See #58

2.1.1

See #54

2.1.0

Version 2.1 introduces item names for dimensions, 3D plotting and much more.
See #52 for details.

2.0.1

Fixes for Jax and PyTorch due to breaking changes in newer versions of these libraries.
In particular https://github.com/google/jax/releases/tag/jax-v0.2.21

Pull request #46

2.0.0

Version 2 introduces major changes. See #43 for details.

1.5.1

New features

• Add 1D support for u_net (TensorFlow only)
• Bug fixes and minor additions

Pull request #20

The branch 1.5 will be kept as stable / LTS for Φ-Flow 1

FP Precision

New features:

• Consistent floating point precision using math.set_precision
• MacCormack advection scheme
• Advanced demo scripts: rotating_bar.py, vortex_fit.py
• Basic implementation of Broyden's method for root finding
• Lots of convenience updates: CenteredGrid.sample(function), Domain.dx, general_grid_sample_nd, interpolate

Breaking changes:

• Finite difference in gradient now uses central difference by default
• Noise now only has a single channel unless otherwise specified

Pull request #18

This is the last major update of the Φ_Flow 1.x series.

ICLR 2020 Update

New features:

• TensorFlow: Seamless TensorFlow data pipeline integration, standard U-net architecture in phi.tf.standard_networks, CUDA resampling operator
• Improved support for point clouds and sampled fields (SampledField), RK4 advection
• Symbolic field math, Noise field to replace math.randfreq()
• Support for STICKY / NO_SLIP domain boundaries and moving/rotating obstacles
• Web interface: Quad view, improved color maps and more configuration settings, configurable axis order using physics_config.x_first()

Breaking changes:

• Change in math.resample() for 'constant' boundaries. This affects only values sampled close to the boundary.
• Inflows now use antialiased geometry by default.
• (minor) Removed keyword arguments from Field.at() and Field.sample_at().
• (minor) Scene.copy_calling_script() now has different keyword arguments.
• (minor) GeometryMask only holds one Geometry and behaves in line with AnalyticField.
• (minor) math.resample(): No longer accepts boundary 'zero' as an alias for 'constant'.

Deprecations:

• load_state(): Use build_graph_input() instead.
• buoyancy(): Use density * -gravity * factor in conjunction with Field.at() instead.
• StaggeredGrid.from_scalar(): Use Field.at() instead.
• world.add_all(): Use world.add() instead.
• Dataset.add(), Dataset.remove(): Mutable datasets are not supported.
• Geometry.value_at(): Use Geometry.lies_inside() instead.
• union_mask(): Use mask(union()) instead.

This is the last official version with Python 2 and Python 3 support.

Periodic domains

Version Highlights:

• Periodic pressure solve
• Improved structs: content_type, global item context, batched structs

Breaking Changes:

• (minor) Removed item_condition argument from placeholder(). Use the context item condition instead.
• (minor) CenteredGrid.dtype now returns a CenteredGrid. Same for StaggeredGrid.
• (minor) Passing item_condition=None anywhere now uses the context item condition. Use item_condition=ALL_ITEMS to iterate over all items.
• (minor) StructBackend now validates returned values by default. Replace it with StructBackend(target_content_type=struct.INVALID) to revert to old behavior.

Deprecations:

• math.types: Use Struct.dtype instead.
• StateCollection.default_physics
• struct.unsafe(): Set content_type to non-data instead.

Pull request #10