Point Type

There is a Java enum PointType that contains the types you can annotate an point with.

Point annotation in PointType

        /** Before a type is determined */
        UNKNOWN,
        
        /** If the point has a sharp angle for now 30 degrees is set as the limit */
        HARD_CORNER,

        /** If it is not a hard point */
        SOFT_POINT,
        
        /** 3 or more lines meets, U is for unknown */
        U_JUNCTION,
        
        /** 3 lines meet 2 are collinear and the last is somewhat orthogonal */
        T_JUNCTION,

        /** 3 lines meet less than 180 degrees between all of them */
        ARROW_JUNCTION,

        /** 3 lines meet, not a T junction */
        Y_JUNCTION,
        
        /** point is an end point, 
         * maybe later there should be a distinction between end points and have 
         * nothing else close by and end points that have close neighbors */
        END_POINT,