y: 20 x: 40 dx: 18, dy: 0 i: 1 fy: 7, y2: 7, sgn(dy): 0 fx: 7, x2: 6, sgn(dx): 1 i: 2 fy: 7, y2: 7, sgn(dy): 0 fx: 8, x2: 6, sgn(dx): 1 i: 3 fy: 7, y2: 7, sgn(dy): 0 fx: 9, x2: 6, sgn(dx): 1 i: 4 fy: 7, y2: 7, sgn(dy): 0 fx: 10, x2: 6, sgn(dx): 1 i: 5 fy: 7, y2: 7, sgn(dy): 0 fx: 11, x2: 6, sgn(dx): 1 i: 6 fy: 7, y2: 7, sgn(dy): 0 fx: 12, x2: 6, sgn(dx): 1 i: 7 fy: 7, y2: 7, sgn(dy): 0 fx: 13, x2: 6, sgn(dx): 1 i: 8 fy: 7, y2: 7, sgn(dy): 0 fx: 14, x2: 6, sgn(dx): 1 i: 9 fy: 7, y2: 7, sgn(dy): 0 fx: 15, x2: 6, sgn(dx): 1 i: 10 fy: 7, y2: 7, sgn(dy): 0 fx: 16, x2: 6, sgn(dx): 1 i: 11 fy: 7, y2: 7, sgn(dy): 0 fx: 17, x2: 6, sgn(dx): 1 i: 12 fy: 7, y2: 7, sgn(dy): 0 fx: 18, x2: 6, sgn(dx): 1 i: 13 fy: 7, y2: 7, sgn(dy): 0 fx: 19, x2: 6, sgn(dx): 1 i: 14 fy: 7, y2: 7, sgn(dy): 0 fx: 20, x2: 6, sgn(dx): 1 i: 15 fy: 7, y2: 7, sgn(dy): 0 fx: 21, x2: 6, sgn(dx): 1 i: 16 fy: 7, y2: 7, sgn(dy): 0 fx: 22, x2: 6, sgn(dx): 1 i: 17 fy: 7, y2: 7, sgn(dy): 0 fx: 23, x2: 6, sgn(dx): 1 dx: 5, dy: -5 i: 1 fy: 11, y2: 12, sgn(dy): -1 fx: 2, x2: 1, sgn(dx): 1 i: 2 fy: 10, y2: 12, sgn(dy): -1 fx: 3, x2: 1, sgn(dx): 1 i: 3 fy: 9, y2: 12, sgn(dy): -1 fx: 4, x2: 1, sgn(dx): 1 i: 4 fy: 8, y2: 12, sgn(dy): -1 fx: 5, x2: 1, sgn(dx): 1 dx: 0, dy: -1 dx: -5, dy: 5 i: 1 fy: 9, y2: 8, sgn(dy): 1 fx: 5, x2: 6, sgn(dx): -1 i: 2 fy: 10, y2: 8, sgn(dy): 1 fx: 4, x2: 6, sgn(dx): -1 i: 3 fy: 11, y2: 8, sgn(dy): 1 fx: 3, x2: 6, sgn(dx): -1 i: 4 fy: 12, y2: 8, sgn(dy): 1 fx: 2, x2: 6, sgn(dx): -1 dx: 0, dy: -8 i: 1 fy: 15, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 i: 2 fy: 14, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 i: 3 fy: 13, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 i: 4 fy: 12, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 i: 5 fy: 11, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 i: 6 fy: 10, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 i: 7 fy: 9, y2: 16, sgn(dy): -1 fx: 6, x2: 6, sgn(dx): 0 dx: -3, dy: 0 i: 1 fy: 16, y2: 16, sgn(dy): 0 fx: 8, x2: 9, sgn(dx): -1 i: 2 fy: 16, y2: 16, sgn(dy): 0 fx: 7, x2: 9, sgn(dx): -1 dx: 0, dy: 5 i: 1 fy: 12, y2: 11, sgn(dy): 1 fx: 9, x2: 9, sgn(dx): 0 i: 2 fy: 13, y2: 11, sgn(dy): 1 fx: 9, x2: 9, sgn(dx): 0 i: 3 fy: 14, y2: 11, sgn(dy): 1 fx: 9, x2: 9, sgn(dx): 0 i: 4 fy: 15, y2: 11, sgn(dy): 1 fx: 9, x2: 9, sgn(dx): 0 dx: -3, dy: -3 i: 1 fy: 13, y2: 14, sgn(dy): -1 fx: 11, x2: 12, sgn(dx): -1 i: 2 fy: 12, y2: 14, sgn(dy): -1 fx: 10, x2: 12, sgn(dx): -1 dx: 0, dy: -2 i: 1 fy: 15, y2: 16, sgn(dy): -1 fx: 12, x2: 12, sgn(dx): 0 dx: -3, dy: 0 i: 1 fy: 16, y2: 16, sgn(dy): 0 fx: 14, x2: 15, sgn(dx): -1 i: 2 fy: 16, y2: 16, sgn(dy): 0 fx: 13, x2: 15, sgn(dx): -1 dx: 0, dy: 2 i: 1 fy: 15, y2: 14, sgn(dy): 1 fx: 15, x2: 15, sgn(dx): 0 dx: 3, dy: 3 i: 1 fy: 12, y2: 11, sgn(dy): 1 fx: 13, x2: 12, sgn(dx): 1 i: 2 fy: 13, y2: 11, sgn(dy): 1 fx: 14, x2: 12, sgn(dx): 1 dx: -9, dy: 0 i: 1 fy: 11, y2: 11, sgn(dy): 0 fx: 20, x2: 21, sgn(dx): -1 i: 2 fy: 11, y2: 11, sgn(dy): 0 fx: 19, x2: 21, sgn(dx): -1 i: 3 fy: 11, y2: 11, sgn(dy): 0 fx: 18, x2: 21, sgn(dx): -1 i: 4 fy: 11, y2: 11, sgn(dy): 0 fx: 17, x2: 21, sgn(dx): -1 i: 5 fy: 11, y2: 11, sgn(dy): 0 fx: 16, x2: 21, sgn(dx): -1 i: 6 fy: 11, y2: 11, sgn(dy): 0 fx: 15, x2: 21, sgn(dx): -1 i: 7 fy: 11, y2: 11, sgn(dy): 0 fx: 14, x2: 21, sgn(dx): -1 i: 8 fy: 11, y2: 11, sgn(dy): 0 fx: 13, x2: 21, sgn(dx): -1 dx: 0, dy: -5 i: 1 fy: 15, y2: 16, sgn(dy): -1 fx: 21, x2: 21, sgn(dx): 0 i: 2 fy: 14, y2: 16, sgn(dy): -1 fx: 21, x2: 21, sgn(dx): 0 i: 3 fy: 13, y2: 16, sgn(dy): -1 fx: 21, x2: 21, sgn(dx): 0 i: 4 fy: 12, y2: 16, sgn(dy): -1 fx: 21, x2: 21, sgn(dx): 0 dx: -3, dy: 0 i: 1 fy: 16, y2: 16, sgn(dy): 0 fx: 23, x2: 24, sgn(dx): -1 i: 2 fy: 16, y2: 16, sgn(dy): 0 fx: 22, x2: 24, sgn(dx): -1 dx: 0, dy: 5 i: 1 fy: 12, y2: 11, sgn(dy): 1 fx: 24, x2: 24, sgn(dx): 0 i: 2 fy: 13, y2: 11, sgn(dy): 1 fx: 24, x2: 24, sgn(dx): 0 i: 3 fy: 14, y2: 11, sgn(dy): 1 fx: 24, x2: 24, sgn(dx): 0 i: 4 fy: 15, y2: 11, sgn(dy): 1 fx: 24, x2: 24, sgn(dx): 0 dx: -3, dy: -3 i: 1 fy: 13, y2: 14, sgn(dy): -1 fx: 26, x2: 27, sgn(dx): -1 i: 2 fy: 12, y2: 14, sgn(dy): -1 fx: 25, x2: 27, sgn(dx): -1 dx: 0, dy: -2 i: 1 fy: 15, y2: 16, sgn(dy): -1 fx: 27, x2: 27, sgn(dx): 0 dx: -3, dy: 0 i: 1 fy: 16, y2: 16, sgn(dy): 0 fx: 29, x2: 30, sgn(dx): -1 i: 2 fy: 16, y2: 16, sgn(dy): 0 fx: 28, x2: 30, sgn(dx): -1 dx: 0, dy: 2 i: 1 fy: 15, y2: 14, sgn(dy): 1 fx: 30, x2: 30, sgn(dx): 0 dx: 3, dy: 3 i: 1 fy: 12, y2: 11, sgn(dy): 1 fx: 28, x2: 27, sgn(dx): 1 i: 2 fy: 13, y2: 11, sgn(dy): 1 fx: 29, x2: 27, sgn(dx): 1 dx: -4, dy: 4 i: 1 fy: 8, y2: 7, sgn(dy): 1 fx: 30, x2: 31, sgn(dx): -1 i: 2 fy: 9, y2: 7, sgn(dy): 1 fx: 29, x2: 31, sgn(dx): -1 i: 3 fy: 10, y2: 7, sgn(dy): 1 fx: 28, x2: 31, sgn(dx): -1 dx: -2, dy: -2 i: 1 fy: 8, y2: 9, sgn(dy): -1 fx: 32, x2: 33, sgn(dx): -1 dx: -3, dy: 0 i: 1 fy: 9, y2: 9, sgn(dy): 0 fx: 35, x2: 36, sgn(dx): -1 i: 2 fy: 9, y2: 9, sgn(dy): 0 fx: 34, x2: 36, sgn(dx): -1 dx: -2, dy: 2 i: 1 fy: 8, y2: 7, sgn(dy): 1 fx: 37, x2: 38, sgn(dx): -1 dx: 5, dy: 5 i: 1 fy: 3, y2: 2, sgn(dy): 1 fx: 34, x2: 33, sgn(dx): 1 i: 2 fy: 4, y2: 2, sgn(dy): 1 fx: 35, x2: 33, sgn(dx): 1 i: 3 fy: 5, y2: 2, sgn(dy): 1 fx: 36, x2: 33, sgn(dx): 1 i: 4 fy: 6, y2: 2, sgn(dy): 1 fx: 37, x2: 33, sgn(dx): 1 dx: 2, dy: -2 i: 1 fy: 3, y2: 4, sgn(dy): -1 fx: 32, x2: 31, sgn(dx): 1 dx: 2, dy: 2 i: 1 fy: 3, y2: 2, sgn(dy): 1 fx: 30, x2: 29, sgn(dx): 1 dx: 5, dy: -5 i: 1 fy: 6, y2: 7, sgn(dy): -1 fx: 25, x2: 24, sgn(dx): 1 i: 2 fy: 5, y2: 7, sgn(dy): -1 fx: 26, x2: 24, sgn(dx): 1 i: 3 fy: 4, y2: 7, sgn(dy): -1 fx: 27, x2: 24, sgn(dx): 1 i: 4 fy: 3, y2: 7, sgn(dy): -1 fx: 28, x2: 24, sgn(dx): 1 20 40 ........................................ ........................................ .............................*...*...... ............................/.\./.\..... .........................../...*...\.... ........................../.........\... ........................./...........\.. ......*=================*......*......*. ...../*......................./.\..../.. 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