Process for designing dimple pattern of golf ball
View Patent ↗A golf ball 2 has, on a surface thereof, a dimple pattern consisting of a land 10 and a large number of dimples 8 . A process for designing the dimple pattern includes the steps of: (1) randomly arranging a large number of points on the surface of a phantom sphere; (2) calculating a distance between a first point and a second point which is a point closest to the first point; (3) deciding a radius on the basis of the distance; (4) assuming a circle which has a center at the first point and has the radius; and (5) assuming a dimple 8 whose contour coincides with the circle.
1. A process for designing a dimple pattern of a golf ball, the process comprising the steps of:
(1) establishing an initial point on a surface of a phantom sphere;
(2) randomly arranging a plurality of points on the surface of the phantom sphere, wherein the step (2) includes the steps of:
(2.1) generating random numbers;
(2.2) deciding a coordinate on the surface of the phantom sphere on the basis of the random numbers;
(2.3) calculating a distance between a point having the coordinate and a point already on the surface of the phantom sphere closest to the point having the coordinate;
(2.4) recognizing the point having the coordinate as a point present on the surface of the phantom sphere when the distance is within a predetermined range;
(2.5) repeating steps (2.1)-(2.4) until a number of points on the surface of the phantom sphere reaches a predetermined number;
(2.6) regarding one point on the surface of the phantom sphere as a reference point;
(2.7) deciding a plurality of adjacent points which are adjacent to the reference point;
(2.8) calculating an average of coordinates of the plurality of adjacent points; and
(2.9) replacing a coordinate of the reference point with a coordinate of the average;
(3) calculating a distance between a first point and a second point which is a point closest to the first point;
(4) deciding a radius on the basis of the distance;
(5) assuming a circle which has a center at the first point and has the radius;
(6) assuming a dimple whose contour coincides with the circle;
(7) repeating steps (3)-(6) for all points on the phantom sphere; and
(8) making said dimple pattern based on said steps (2)-(6).
2. The process according to claim 1 , wherein the step (2.7) includes the steps of:
(2.7.1) assuming a large number of triangles by a Delaunay triangulation using all points on the surface of the phantom sphere; and
(2.7.2) regarding other vertices of a triangle whose vertex is the reference point, as the adjacent points.
3. The process according to claim 1 , wherein, at the step (4), half of the distance is set as the radius.