Christian Svensson 0d30ddb747 render: slices, surface values and streamlines of cell flow fields ...

A fluid step's result is a field per cell of a regular grid, not per
node, so the contour machinery had nothing to draw it with and the
viewport showed nothing after a fluid solve.

Add `render::flow`, CPU display data for such fields with no solver
dependency (render stays at L1): an axis-aligned slice through the
cells as triangles carrying cell-centred values (interpolated between
the two layers either side, outer centres moved to the domain faces,
cells inside obstacles left out), the field sampled at a surface
beside the fluid cells for colouring an obstacle, and streamlines
traced through the trilinear velocity field by the midpoint rule,
seeded on a lattice upstream of the obstacles. Seeds, steps and the
total number of points are capped so hostile counts cost a bounded
time. `contour::banded` fans band pieces into scene triangles for the
callers.

Part of #193.

2026-10-17 07:25:04 -04:00

..

src

render: slices, surface values and streamlines of cell flow fields

2026-10-17 07:25:04 -04:00

Cargo.toml

Rename the project to FieldCraft

2026-10-13 23:51:40 -04:00