cao.py

Created by klfraimbow

Created on April 28, 2024

907 Bytes


1950 CAO
Conception Assiste par Ordinateur

different format
obj, fbx, dae
contient la geometrie, textures, 
couleurs

un fichier Standard Triangle Langage
est un format utilise pour stocker
les informations geometrie de la
surfacer d un objet en 3 dimensions
a l aide de milliers de triangle
simple efficasse il ne conserve que 
que les info essentielle a la 
fabrication de l objet 3D. 

Z
  Y
    X

dessine 1/2 face parallelepipede 
GCode
facet normal (face choisi)
 outer loop (boucle)
   vertex   X     Y     Z
 end loop (fin boucle)  
end facet

defaut circularite
a = 360/nb de triangle = 

triangle OBH rectangle en H
OH (big cote angle droit) 
= Rayon*cos(a/2)

defaut = rayon-OH

sin(a/2)=BH/BO=BH/Rayon
BH = sin(a/2)*Rayon

BC (longueur de corde)
= 2*BH
= 2* rayon * sin(a/2)

trigo : abc rectangle en a
ac cote oppose
ab cote adjacent

sin abc = AC/BC
cos abc = AB/BC
tan abc = AC/AB

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