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feat(render3d): terrain_chunk_heights - the ground's B-spline heights a chunk at a time (23.5)

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n x n samples of chunk (i, j) of a size_m grid from the terrain's corner, row-major into the
caller's buffer with nothing allocated, each the (1 4 1) / 6 B-spline filter of the texels under it
(ter_spline_at): what ludic.physics' jph_shape_heightfield_bspline makes of the whole map, so a
chunk's physics ground matches the drawn one and its neighbours' to the bit. The read-back lives
for the whole map (terrain_generate to terrain_unload). examples/rendering/chunks.ludic, in the
suite, checks the shared edges, a sample against the filter by hand, and a short buffer refused.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-28 11:25:21 +03:00
parent 3915af34c2
commit ff658633fb
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tools/ludic-cli/test.ludic
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@ -1054,6 +1054,7 @@ function cmd_dev_test() -> int {
headless_case("rendering/ui_render3d", "ok", "ui_render3d.ludic (ludic.ui's render3d backend builds against the renderer)")
headless_line_case("rendering/release", "RELEASE OK", "release.ludic (model_release: meshes go, a shared texture stays until its last user goes)")
headless_line_case("rendering/bc", "BC OK", "bc.ludic (a .dds beside a .png arrives BC7-compressed with every mip level)")
headless_line_case("rendering/chunks", "CHUNKS OK", "chunks.ludic (the ground's B-spline heights a 64 m chunk at a time, edges shared bit for bit)")
migrate_component_case()
migrate_foreign_case()
reject_case("rejected/runtime_type_clash", "PadButton is the runtime's enum", "a program's type named like one of the runtime's is refused")