Re: [ft-devel] Fast bisecting BBox_Cubic_Check

[Dmitry Timoshkov]

Alexei Podtelezhnikov <address@hidden> wrote:

> > Looks good, thanks!  How do you check that the new code produces
> > identical bboxes?
> 
> I used src/tools/test_bbox.c. I had to add some hexadecimal output,
> because the original output was just identical. As you'll see below
> the results are not bit-identical. I wish I knew the true answer. One
> possibility is to add a third outline to test_bbox with known
> theoretical bbox.
> 
> OLD CODE:
> address@hidden ft-test]$ ./bbox
> outline #1
> time =  0.13 cbox = [-37.88 535.32 455.89 786.22]
> cbox_hex =  [FFDA1F9E 021750FF 01C7E381 0312387F]
> time =  3.14 bbox = [115.62 535.32 412.08 672.25]
> bbox_hex =  [00739FDF 021750FF 019C14EE 02A04028]
...
> NEW CODE:
> address@hidden ft-test]$ ./bbox
> outline #1
> time =  0.13 cbox = [-37.88 535.32 455.89 786.22]
> cbox_hex =  [FFDA1F9E 021750FF 01C7E381 0312387F]
> time =  7.34 bbox = [115.62 535.32 412.08 672.25]
> bbox_hex =  [00739F5D 021750FF 019C143F 02A03FD5]

You may try to change precision from .2f to print more digits
after the point (probably just completely remove the limit).

-- 
Dmitry.