#rational patches for torus (exact)
BEZ224
		-1.0	.5	0	1
		0	0	1.0	0
		1.0	.5	0	1
		-.5	0	0	0
		0	0	.5	0
		.5	0	0	0
		-1.0	-.5	0	1
		0	0	1.0	0
		1.0	-.5	0	1

		-1.0	-.5	0	1
		0	0	1.0	0
		1.0	-.5	0	1
		.5	0	0	0
		0	0	-.5	0
		-.5	0	0	0
		-1.0	.5	0	1
		0	0	1.0	0
		1.0	.5	0	1

		-1.0	-.5	0	1
		0	0	-1.0	0
		1.0	-.5	0	1
		-.5	0	0	0
		0	0	-.5	0
		.5	0	0	0
		-1.0	.5	0	1
		0	0	-1.0	0
		1.0	.5	0	1

		-1.0	.5	0	1
		0	0	-1.0	0
		1.0	.5	0	1
		.5	0	0	0
		0	0	.5	0
		-.5	0	0	0
		-1.0	-.5	0	1
		0	0	-1.0	0
		1.0	-.5	0	1