Representation of Oblique Circles in CAD Implemented in a Python Script for Rhinoceros

  1. Pau Natividad Vivó
  2. Ricardo García Baño
  3. Macarena Salcedo Galera
  4. José Calvo López
Architectural Graphics
  1. Manuel Alejandro Ródenas López (ed. lit.)
  2. José Calvo López (ed. lit.)
  3. Macarena Salcedo Galera (ed. lit.)

Editorial: Springer Suiza

ISBN: 9783031046315

Año de publicación: 2022

Título del volumen: Graphics for Analysis

Volumen: 1

Páginas: 294-303

Congreso: Congreso Internacional de Expresión Gráfica Arquitectónica (19. 2022. Cartagena)

Tipo: Aportación congreso


This paper reviews some Rhinoceros procedures for drawing ellipses that represent circles contained in planes oblique to the projection plane. After this, it presents a general procedure valid for all cases of ellipse projections regardless of whether a parallel projection system (orthographic projections and axonometry) or a central projection system (linear perspective) is used. The first group of procedures allow drawing an ellipse from the circumscribed parallelogram, while the general procedure uses any circumscribed convex quadrilateral as input data. Furthermore, this general procedure has been programmed and automated in a Python script for the 3D modeling software Rhinoceros 7.