# JMath3D
# Pyramide régulière.
# Sommet principal
v 0 0 2 20

# La base est un icosagone régulier.
v  0.951057 -0.309017 0
v  0.809017 -0.587785 0
v  0.587785 -0.809017 0
v  0.309017 -0.951057 0
v  0        -1        0
v -0.309017 -0.951057 0
v -0.587785 -0.809017 0
v -0.809017 -0.587785 0
v -0.951057 -0.309017 0
v -1         0        0
v -0.951057  0.309017 0
v -0.809017  0.587785 0
v -0.587785  0.809017 0
v -0.309017  0.951057 0
v  0         1        0
v  0.309017  0.951057 0
v  0.587785  0.809017 0
v  0.809017  0.587785 0
v  0.951057  0.309017 0
v  1         0        0

# Base
f 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

# Faces latérales
f 1 3 2
f 1 4 3
f 1 5 4
f 1 6 5
f 1 7 6
f 1 8 7
f 1 9 8
f 1 10 9
f 1 11 10
f 1 12 11
f 1 13 12
f 1 14 13
f 1 15 14
f 1 16 15
f 1 17 16
f 1 18 17
f 1 19 18
f 1 20 19
f 1 21 20
f 1 2 21
# 21 vertices, 21 faces