Generation of pattern data with no overlapping or excessive distance between adjacent patterns

A device for generating pattern data for unevenness that is randomly arranged on a reflecting surface, said device comprising:

• data entry means for entering a basic pitch, a movable range, and a line width;
• array generation means for regularly arranging a multiplicity of base coordinates in two dimensions in accordance with said basic pitch entered by said data entry means;
• coordinate displacement means for randomly displacing within said movable range at least a portion of said base coordinates arranged by said array generation means to generate a multiplicity of displaced coordinates;
• pattern generation means for arranging a line pattern with said line width at each side of a plurality of predetermined polygons that take as vertices at least a portion of said displaced coordinates generated by said coordinate displacement means to generate the pattern data;
• and
• entry confirmation means for determining whether or not said basic pitch P, said movable range R, and said line width W entered by said data entry means satisfy the relationship:
• P≧2R+W.

A device for generating pattern data for unevenness that is randomly arranged on a reflecting surface, said device comprising:

• data entry means for entering a basic pitch, a movable range, and a line width;
• array generation means for regularly arranging a multiplicity of base coordinates in two dimensions in accordance with said basic pitch entered by said data entry means;
• coordinate displacement means for randomly displacing within said movable range at least a portion of said base coordinates arranged by said array generation means to generate a multiplicity of displaced coordinates;
• and
• pattern generation means for arranging a line pattern with said line width at each side of a plurality of predetermined polygons that take as vertices at least a portion of said displaced coordinates generated by said coordinate displacement means to generate the pattern data for unevenness that is randomly arranged on the reflecting surface, wherein said array generation means includes means for arranging said base coordinates in positions such that even numbered rows of the base coordinates are displaced by one half of said basic pitch in the column direction relative to odd numbered rows of the base coordinates.

A computer-readable storage medium storing a computer program for causing a computer to execute processes for generating pattern data for unevenness that is randomly arranged on a reflecting surface, said computer program comprising executable code that provides:

• a first command set for entering a pitch, a movable range, and a line width;
• a second command set for regularly arranging a multiplicity of base coordinates in two dimensions in accordance with said basic pitch entered by said first command set;
• a third command set for randomly displacing within said movable range at least a portion of said base coordinates arranged by said second command set, wherein the third command set provides for displacing said base coordinates such that half width H of a distribution graph of the displacements of said displaced coordinates satisfies the relationship with said basic pitch P:
• 0.3 P≦H≦0.9 P;
• and
• a fourth command set for arranging a line pattern with said line width at each side of a plurality of predetermined polygons that take as vertices at least a portion of said displaced coordinates generated by said third command set to generate the pattern data for unevenness that is randomly arranged on the reflecting surface.

A computer-readable storage medium storing a computer program for causing a computer to execute processes for generating pattern data for unevenness that is randomly arranged on a reflecting surface, said computer program comprising executable code that provides:

• a first command set for entering a pitch, a movable range, and a line width;
• a second command set for regularly arranging a multiplicity of base coordinates in two dimensions in accordance with said basic pitch entered by said first command set;
• a third command set for randomly displacing within said movable range at least a portion of said base coordinates arranged by said second command set;
• and
• a fourth command set for arranging a line pattern with said line width at each side of a plurality of predetermined polygons that take as vertices at least a portion of said displaced coordinates generated by said third command set to generate the pattern data for unevenness that is randomly arranged on the reflecting surface, wherein the line pattern is arranged according to the basic pitch P, the movable range R, and the line width W satisfying the relationship:
• P≦2R+W.

A computer-readable storage medium storing a computer program for causing a computer to execute processes for generating pattern data for unevenness that is randomly arranged on a reflecting surface, said computer program comprising executable code that provides:

• a first command set for entering a pitch, a movable range, and a line width;
• a second command set for regularly arranging a multiplicity of base coordinates in two dimensions in accordance with said basic pitch entered by said first command set, wherein the second command set provides for arranging said base coordinates in positions such that even numbered rows of the base coordinates are displaced by one half of said basic pitch in the column direction relative to odd numbered rows of the base coordinates;
• a third command set for randomly displacing within said movable range at least a portion of said base coordinates arranged by said second command set;
• and
• a fourth command set for arranging a line pattern with said line width at each side of a plurality of predetermined polygons that take as vertices at least a portion of said displaced coordinates generated by said third command set to generate the pattern data for unevenness that is randomly arranged on the reflecting surface.