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returns POSITIVE, if s lies on the positive side of the oriented plane h defined by p, q, and r, returns NEGATIVE if s lies on the negative side of h, and returns COPLANAR if s lies on h. | ||
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returns POSITIVE if u, v and w are positively oriented, returns NEGATIVE if u, v and w are negatively oriented, and returns COPLANAR if u, v and w are coplanar. | ||
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returns the orientation of the sphere s. |