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[draw] fix extrude without out-of-bounds slice

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This commit is contained in:
Jan Petykiewicz 2026-04-20 10:52:45 -07:00
commit 481b56874e
2 changed files with 30 additions and 10 deletions
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23
gridlock/draw.py
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@ -76,10 +76,10 @@ class GridDrawMixin(GridPosMixin):
# Broadcast foreground where necessary
foregrounds: Sequence[foreground_callable_t] | Sequence[float]
if numpy.size(foreground) == 1: # type: ignore
foregrounds = [foreground] * len(cell_data) # type: ignore
elif isinstance(foreground, numpy.ndarray):
if isinstance(foreground, numpy.ndarray):
raise GridError('ndarray not supported for foreground')
if callable(foreground) or numpy.isscalar(foreground):
foregrounds = [foreground] * len(cell_data) # type: ignore[list-item]
else:
foregrounds = foreground # type: ignore
@ -376,15 +376,18 @@ class GridDrawMixin(GridPosMixin):
foreground_func = []
for ii, grid in enumerate(cell_data):
zz = self.pos2ind(rectangle[0, :], ii, round_ind=False, check_bounds=False)[direction]
ind = [int(numpy.floor(zz)) if dd == direction else slice(None) for dd in range(3)]
fpart = zz - numpy.floor(zz)
mult = [1 - fpart, fpart][::sgn] # reverses if s negative
low = int(numpy.clip(numpy.floor(zz), 0, grid.shape[direction] - 1))
high = int(numpy.clip(numpy.floor(zz) + 1, 0, grid.shape[direction] - 1))
foreground = mult[0] * grid[tuple(ind)]
ind[direction] += 1 # type: ignore #(known safe)
foreground += mult[1] * grid[tuple(ind)]
low_ind = [low if dd == direction else slice(None) for dd in range(3)]
high_ind = [high if dd == direction else slice(None) for dd in range(3)]
if low == high:
foreground = grid[tuple(low_ind)]
else:
mult = [1 - fpart, fpart][::sgn] # reverses if s negative
foreground = mult[0] * grid[tuple(low_ind)] + mult[1] * grid[tuple(high_ind)]
def f_foreground(xs, ys, zs, ii=ii, foreground=foreground) -> NDArray[numpy.int64]: # noqa: ANN001
# transform from natural position to index

17
gridlock/test/test_grid.py
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@ -238,6 +238,23 @@ def test_get_slice_uses_shifted_grid_bounds() -> None:
grid.get_slice(cell_data, Plane(x=2.1), which_shifts=0)
def test_draw_extrude_rectangle_uses_boundary_slice() -> None:
grid = Grid([[0, 1, 2], [0, 1, 2], [0, 1, 2]], shifts=[[0, 0, 0]])
cell_data = grid.allocate(0)
source = numpy.array([[1, 2],
[3, 4]], dtype=float)
cell_data[0, :, :, 1] = source
grid.draw_extrude_rectangle(
cell_data,
rectangle=[[0, 0, 2], [2, 2, 2]],
direction=2,
polarity=-1,
distance=2,
)
assert_allclose(cell_data[0, :, :, 0], source)
assert_allclose(cell_data[0, :, :, 1], source)
def test_sampled_preview_exyz_tracks_nonuniform_centers() -> None: