Design Nomenclature / Form & Geometry

Scale

Also called scaling, non-uniform scale, scale transform, freeze transform

Multiplying coordinates by a factor about a fixed point. Uniform scale preserves angles and shape; non-uniform scale does not, and it distorts normals in a way that requires the inverse-transpose of the matrix to correct — which is why a squashed object shades wrong until its transform is frozen. Negative scale mirrors and reverses winding order.

A circle with a radius drawn, shown scaled uniformly to a larger circle and, beside it, scaled only along x into an ellipse with the surface normal at one point visibly no longer perpendicular.

In practice

The transform, distinct from scale as a compositional relationship between elements. 'Freeze transforms' bakes the matrix into the vertices; skipping it is why exported models arrive at the wrong size with their faces inside out.

Not to be confused with

How this term connects

Affine transformLocal spaceNormalReflectionScaleWorld spaceScale
Related Confused with