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.
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