VectorsRST75

VectorsRST75 is a data format specification for encoding triads of three-dimensional vectors associated with geometric primitives in computer graphics and simulation. The name reflects three vector channels labeled R, S and T, together with the version identifier 75. The format aims to provide a compact, consistent representation that can be adopted by mesh processors, shader pipelines, and simulation engines.

In the common encoding, each vertex (or cell) carries a triple of 3D vectors: R, S and T. Each vector consists of three 32-bit floating-point components (x, y, z). The typical on-disk or in-memory layout stores the nine floats in the order R.x, R.y, R.z, S.x, S.y, S.z, T.x, T.y, T.z. Optional metadata may accompany the data to indicate the intended interpretation of the vectors, such as tangents, normals, or deformation directions, enabling flexible usage across different workflows.

Versioning in the name signals revisions or minor updates to the specification, enabling backward-compatible changes while allowing tooling to opt into newer features. The 75 suffix does not imply a strict numerical limit on geometries but rather marks a reference point in the format’s evolution.

Applications of vectorsRST75 include encoding per-vertex directional data for deformations, procedural shading inputs, and vector-field representations associated with mesh surfaces. The format emphasizes compatibility with existing 3D data pipelines and seeks to balance expressiveness with efficient storage and parsing.

See also: vector formats in 3D graphics, vertex attributes, tangent space representations.