v 1 1 1
v 1 1 1 2
v 1 1 1 3 4 5
vt 1 2 3

o Object
g Tri
f 1/1 2/1 3/1
g Lines
l 1 2
l 1/1 2/1
g Points
p 1
p 1 2 3

cstype bmatrix
deg 3 3
step 3 1
bmat u  1      -3       3      -1 \
	0       3      -6       3 \
	0       0       3      -3 \
	0       0       0       1
bmat v  0.16666 -0.50000  0.50000 -0.16666 \
	0.66666  0.00000 -1.00000  0.50000 \
	0.16666  0.50000  0.50000 -0.50000 \
	0.00000  0.00000  0.00000  0.16666
end

cstype rat bspline
deg 2 2
surf -1.0 2.5 -2.0 2.0 -9 -8 -7 -6 -5 -4 -3 -2 -1
parm u -1.00 -1.00 -1.00 2.50 2.50 2.50
parm v -2.00 -2.00 -2.00 -2.00 -2.00 -2.00
trim 0.0 2.0 1
end

vp -0.675  1.850  3.000
vp  0.915  1.930
vp  2.485  0.470  2.000
vp  2.485 -1.030
vp  1.605 -1.890 10.700
vp -0.745 -0.654  0.500
cstype rat bezier
curv2 -6 -5 -4 -3 -2 -1 -6
parm u 0.00 1.00 2.00
sp 2 3
end