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Global Constants and Variables

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

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

bool_point INVALID_BOOL_POINT Constant
b is false and pt is INVALID_POINT.

bool_point_pair INVALID_BOOL_POINT_PAIR Constant
first and second are both INVALID_BOOL_POINT.

bool_real_point INVALID_BOOL_REAL_POINT Constant
b is false, r is INVALID_REAL, and pt is INVALID_POINT.

bool_point_quadruple INVALID_BOOL_POINT_QUADRUPLE Constant
first, second, third, and fourth are all INVALID_BOOL_POINT.