v0.12.1

Features

• PatternConfig: new struct carrying pattern, color, and scale (cells across the object's longest world-space bounding-box dimension, default 8.0). Pattern density is now object-relative — a scale of 8.0 produces 8 cells across the object regardless of mesh units or physical size.
• Volume mesh filled clip: clipping a VolumeMeshData now produces real interior cross-sections instead of an open shell. Boundary faces on the kept side are preserved; intersected cells contribute CPU-generated section polygons coloured by per-cell scalar or direct-colour data. Supports multiple simultaneous clip planes via the same [nx, ny, nz, d] encoding used by ClipPlanesUniform.
  • New ViewportGpuResources methods: upload_clipped_volume_mesh_data and replace_clipped_volume_mesh_data for per-frame GPU slot management.
• VolumeMeshData now supports pyramid (5-vertex) and wedge/triangular-prism (6-vertex) cells in addition to tets and hexes. Both cell types participate fully in boundary extraction, clipping, and per-cell scalar/color attribute remapping.
• New VolumeMeshData push helpers: push_tet, push_pyramid, push_wedge, push_hex. Each method fills sentinel slots automatically, removing the footgun of manually padding the 8-slot cell array.
• ClipObject: two new fields:
  • edge_color: Option<[f32; 4]> — independent RGBA colour for the plane border edge. When set, the edge uses this colour instead of deriving from color, allowing a visible outline with a fully transparent fill.
  • clip_geometry: bool — when false, the object renders its visual indicator but does not contribute to the GPU clip-plane uniform. Default: true. Allows a decorative plane edge with no effect on rendered geometry.

Fixes

• Phantom shadows from stale GPU cull data: cull_instances and write_indirect_args compute shaders previously bounded their loops with arrayLength(), which returns the allocated buffer capacity (2× headroom). When switching to a scene with fewer objects, stale AABB entries from the previous, larger scene were still processed, injecting ghost shadow casters from old geometry. Fixed by adding instance_count and batch_count to FrustumUniform; the shaders now guard against the valid element count rather than the buffer size.
• Scroll unit handling: all eframe examples now pass ScrollUnits::Lines for mouse wheel events and ScrollUnits::Pixels for trackpad events by reading egui::MouseWheelUnit from the MouseWheel event. Previously all eframe examples hardcoded ScrollUnits::Pixels, causing mouse wheel zoom to bypass the PIXELS_PER_LINE scaling and feel incorrect.
• iced example: removed manual * 28.0 line-to-pixel conversion; the library now applies the scaling internally via ScrollUnits::Lines.
• Added ScrollUnits::Pages variant (one unit = viewport height in pixels) to cover egui::MouseWheelUnit::Page and equivalent page-scroll events from other frameworks.
• Clip plane overlay: the border edge previously used a hardcoded alpha (0.6) that ignored color[3], so setting fill opacity to zero still rendered a visible edge. The fill quad is now skipped entirely when color is None, and the border falls back through edge_color -> color -> white.
• Volume mesh latitude scalar: the center cell of a sphere mesh had its centroid exactly at the origin, producing a NaN latitude value that was invisible on the boundary surface but appeared as a hole in CPU-generated section faces. The centroid length is now clamped to 1e-6 before normalization.