geometry

Italian news site AltreNotizie reports on an embargo linked to Canada and Israel, described as applying unevenly depending on circumstances, a 'variable geometry' arrangement. The piece connects the story to broader debates around the Gaza conflict and its economic and political fallout, which readers are following alongside related coverage of Ukraine and ongoing trade and arms restrictions.

A new technical blog post explains how the dual polytope can be used to simplify convex hulls in computational geometry. The walkthrough breaks down the mathematics behind duality and shows how it leads to simpler, more robust hull-simplification algorithms. Readers in the programming and geometry community are engaging with the post, discussing the clarity of the explanation and its practical applications in graphics and optimization.

An Italian-language commentary examines Canada's stance on the arms embargo against Israel, describing it as 'a variable geometry' policy — inconsistent or selectively applied. The piece links the issue to democracy, government, technology and markets, suggesting Canada's official position does not match its practice. Little verified detail beyond the headline claim is available.

Edmund Halley House in Oxford, UK is being highlighted as a historic site tied to the astronomer's life. Edmond Halley was appointed Savilian Professor of Geometry in January 1703/4 and is believed to have moved into the house two months later as a sub-tenant under a lease John Wallis had held from New College. An observatory was built there in 1705.

The great dirhombicosidodecahedron, an exotic nonconvex polyhedron nicknamed "Miller's Monster," is being discussed after detailed renderings and construction notes circulated online. It is one of the most complex uniform star polyhedra, and enthusiasts are sharing models and explanations of its unusual geometry.

IMAX Dome theaters screen films on a curved, wraparound dome that surrounds the audience, unlike standard IMAX's flat giant screen. Engadget explains how the domed format changes viewing geometry, projection and the overall experience compared with regular IMAX auditoriums, highlighting why some films play better in one format than the other.

Mathematician Maggie Miller has published a Quanta Magazine explanation of how to visualise four-dimensional space, describing 4D as a sequence of 3D snapshots, much like frames on a reel of film. The piece walks through why human intuition, built for three dimensions, struggles with 4D objects and how mathematicians work around that limit. It is drawing attention among science readers interested in topology and higher-dimensional geometry.

A 1995 article on wavelets in 3D graphics has resurfaced, drawing attention on a developer forum. The piece explores how wavelet transforms can compress and represent three-dimensional data such as surfaces and lighting, a technique relevant to rendering and geometry processing. Readers are revisiting the mathematical foundations and discussing how the ideas hold up in modern graphics pipelines.

A developer writing under the name Eniko has published a detailed blog post explaining how software-rendered occlusion culling works in their block-based game. The post walks through the rendering technique used to avoid drawing hidden geometry. It has drawn attention among game developers and is being discussed on Hacker News, where readers are weighing in on the approach and its practical uses.

Ars Technica reports that butterfly wings and the classic rotating barbershop pole rely on the same visual phenomenon: motion illusions created by how light and structure interact. In both cases, patterns moving in one direction can appear to shift the opposite way, a property tied to the microscopic structure of wing scales and the geometry of the striped pole, with implications for studying optics and perception in biology.