Repository navigation
Small polygons under rotation result in SDF flipping its sign #449
Description
These two should be equal, but internally when sampled at (V2 (-1) 0)
the sign of the SDF differs yet they both get rendered correctly.
let funPoly = polygon [V2 0 0, V2 0 (-0.1), V2 (-2) 0, V2 0 (-1)]
rotFunPoly = rotate (2*pi) funPoly> getImplicit funPoly (V2 (-1) 0)
-4.993761694389224e-2
> getBox funPoly
(V2 (-2.0) (-1.0),V2 0.0 0.0)vs
> getImplicit rotFunPoly (V2 (-1) 0))
4.9937616943891996e-2
> getBox rotFunPoly
(V2 (-2.0000000000000004) (-1.0),V2 0.0 4.898587196589413e-16)This has something to do with isIn
and
ImplicitCAD/Graphics/Implicit/ObjectUtil/GetImplicit2.hs
Lines 49 to 56 in 874cb76
and it only seems to affect small polygons + rotation. If the isIn mechanism is dropped, they don't get rendered at all.
Activity
Add hack that prevents generation of small polygons
sorki commentedon Oct 31, 2023
be1ee7a adds golden test (since we don't have any 2D ones). The two renders differ in one pixel and 9 bytes..
Add hack that prevents generation of small polygons
Add hack that prevents generation of small polygons
Add hack that prevents generation of small polygons