Primitives

In 2D computer graphics, primitives are

• points

• lines and line segments

• planes

• circles and ellipses

• triangles, 'quads' or arbitrary polygons

• spline curves

In 3D computer graphics, primitives are simple geometric shapes such as a

• cube

• cylinder

• sphere

• cone

• pyramid

• torus

• triangle / polygon mesh

They are the building blocks for many other shapes and forms.