vTexCoord

vTexCoord is a common vertex attribute used in computer graphics to store texture coordinates. These coordinates are essential for mapping two-dimensional textures onto three-dimensional surfaces within a rendering pipeline. Each vertex in a mesh typically has an associated vTexCoord value.

The vTexCoord is usually represented as a two-dimensional vector, often denoted as (u, v) or (s, t). The u and v components range from 0.0 to 1.0, where (0.0, 0.0) typically corresponds to the bottom-left corner of the texture and (1.0, 1.0) corresponds to the top-right corner. When a texture is applied to a model, the graphics hardware interpolates these vTexCoord values across the surface of each polygon, allowing the texture to be sampled at the correct location for each pixel being rendered.

This attribute is crucial for adding visual detail and realism to 3D models, enabling effects such as surface patterns, image overlays, and lighting effects that depend on texture mapping. Without vTexCoord, surfaces would appear uniformly colored or untextured. The precise naming convention might vary slightly between different graphics APIs and shading languages, but the concept and purpose of vTexCoord remain consistent.