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*/
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*/
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void example2()
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void example2()
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{
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{
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	// Create a null vector
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	// Create a null vector
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	Vec3f p;
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	Vec3f p;
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 	p.set_spherical(0.955317, 3.1415926f/4.0f , 1);
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 	p.set_spherical(0.955317f, 3.1415926f/4.0f , 1.0f);
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	cout << " p = " << p << ", p.length() = " << p.length() << endl;
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	cout << " p = " << p << ", p.length() = " << p.length() << endl;
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}
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}
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void example3()
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void example3()
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{
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{
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}
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}
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void example4()
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void example4()
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{
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{
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	Vec3f p1(0.8660,.4,-.3);
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	Vec3f p1(0.8660f,.4f,-.3f);
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	Vec3f p2(-0.8660,.4,-.3);
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	Vec3f p2(-0.8660f,.4f,-.3f);
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	Vec3f p3(0,.7,-.7141);
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	Vec3f p3(0.0f,.7f,-.7141f);
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	Vec3f n1 = cross(p1,p2);
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	Vec3f n1 = cross(p1,p2);
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	Vec3f n2 = cross(p2,p3);
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	Vec3f n2 = cross(p2,p3);
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	Vec3f n3 = cross(p3,p1);
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	Vec3f n3 = cross(p3,p1);
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	Vec3f n  = normalize(n1+n2+n3);
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	Vec3f n  = normalize(n1+n2+n3);