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22.3 Global Constants and Variables

— Constant: Point INVALID_POINT

The x, y, and z-values in world_coordinates are all INVALID_REAL.

— Constant: Point origin

The x, y, and z-values in world_coordinates are all 0.

— Constant: bool_point INVALID_BOOL_POINT

b is false and pt is INVALID_POINT.

— Constant: bool_point_pair INVALID_BOOL_POINT_PAIR

first and second are both INVALID_BOOL_POINT.

— Constant: bool_real_point INVALID_BOOL_REAL_POINT

b is false, r is INVALID_REAL, and pt is INVALID_POINT.

— Constant: bool_point_quadruple INVALID_BOOL_POINT_QUADRUPLE

first, second, third, and fourth are all INVALID_BOOL_POINT.