[#36] Implement patternFillCalculator for hatch

[dotoritos-kim]

• Implementation the ingredient of #36
• One or more loops should be given for constructor
• To draw a single line in hatch region, call ClipLine with line and this will returns the segments of given line
• Point is { x: number, y: number }

[dotoritos-kim]

Introducing jest will be next PR

[vagran]

dxf-viewer currently heavily relies on three.js for vector math. Shouldn't its Vector2 class be used here for better readability? three.js lacks Matrix2 but I would introduce one in dxf-viewer (in a separate file), probably will be useful for future features. Just with minimal methods required exactly for this file right now, but compatible in names with three.js Matrix3, e.g. , .invert()., .multiply(), etc.

If you feel it currently does not worth the time, we can leave it as is. I can polish it later.

[Phryxia]

dxf-viewer currently heavily relies on three.js for vector math. Shouldn't its Vector2 class be used here for better readability? three.js lacks Matrix2 but I would introduce one in dxf-viewer (in a separate file), probably will be useful for future features. Just with minimal methods required exactly for this file right now, but compatible in names with three.js Matrix3, e.g. , .invert()., .multiply(), etc.

If you feel it currently does not worth the time, we can leave it as is. I can polish it later.

@vagran I'm the author of this PR (=@kimkanghyune) I'll do that but this week I can't proceed due to my company's situation, so please wait for modification. Thank you for your kind feedback and patience!

[dotoritos-kim]

@vagran

Shouldn't its Vector2 class be used here for better readability?

Polishing is finished! Please verify the changes.

[vagran]

Just noticed - you have used 2 space for indentation, however the project uses 4. I have fixed this in dev-hatch branch.