modelview

Modelview is a term used in software engineering and computer graphics to describe two related ideas: a software design relationship between data and its presentation, and a graphics transformation concept used in 3D rendering. In software architecture, the modelview concept describes a pattern in which the model stores data and business logic while the view renders that data for the user. The view may observe the model for changes or be updated by a controller or presenter that handles user input and coordinates updates. This separation aims to reduce coupling and to allow multiple views of the same data.

In computer graphics, the modelview term refers to the modelview matrix, the product of modeling and viewing transformations that converts coordinates from object space to eye space. The modeling transform positions and scales objects in the world; the viewing transform applies the camera's position and orientation. Together they determine how geometry is transformed before projection onto the screen. In legacy graphics pipelines such as OpenGL's fixed-function pipeline, a single modelview matrix is composed and stored on a stack; modern pipelines typically handle these transforms in programmable shaders with separate model, view, and projection matrices.