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106 commits

Author SHA1 Message Date
sheaf b70f7ba133 Add mechanisms to log envelope equation data 2024-02-19 16:46:09 +01:00
sheaf 6b658acedd Restructure project & update bounds 2024-02-17 13:58:40 +01:00
sheaf 92efc4127c add teardrop shaped brush 2023-07-15 16:40:59 +02:00
sheaf 96aa38b3c3 improve rotations in interval arithmetic 
Computing a rotation in interval arithmetic can lose tightness.
Instead of computing

   a cos phi + b sin phi

which doesn't account for the difference in phase in the two sinusoids,
it is better to use

  sqrt (a² + b²) * cos ( phi - atan2(a,b) )

which correctly estimates the maximum amplitude of the sum to be
sqrt(a²+b²) instead of abs(a) + abs(b).

This seems to worsen the performance of the interval Newton method
at the moment, possibly due to the complexity of the new formula,
which involves computing atan(b/a). Further investigation is needed.
 2023-05-14 21:38:25 +02:00
sheaf 52420a1169 experiment: FMA backend for interval arithmetic 
also includes the start of a way to observe which equations
are being solved, which should help with improving the performance of
the interval Newton method
 2023-03-12 19:15:58 +01:00
sheaf 4cd11fa02f add export to SVG functionality 2023-02-03 14:16:57 +01:00
sheaf 8ac22b4738 some optimisations 2023-01-29 04:03:36 +01:00
sheaf 78c03b99e1 change fitpoint render size 2023-01-23 02:01:56 +01:00
sheaf dd503df126 draw cusps in debug mode 2023-01-23 00:37:56 +01:00
sheaf 6945aac704 improve show instances 2023-01-20 17:42:17 +01:00
sheaf 25d738b252 more WIP with TH now 2023-01-20 16:34:04 +01:00
sheaf 684550a795 implement intervallic brushes 2023-01-13 23:10:06 +01:00
sheaf a4e9c1cf32 preparation for interval arithmetic 2023-01-13 06:32:34 +01:00
sheaf 8fc5e6c9b8 compute brush strokes using the envelope equation 2023-01-11 15:26:12 +01:00
sheaf 671dae5474 use R2 instead of Point2D & Vector2D 2023-01-09 04:27:08 +01:00
sheaf 22820b328d more cabal file cleanups 2023-01-09 02:54:42 +01:00
sheaf cca4558985 put all colours into a separate CSS file 2023-01-08 21:12:00 +01:00
sheaf 5bd4e7f4cf framework for brush differentiation 2023-01-08 17:16:14 +01:00
sheaf 4e5c848883 kill off brush EDSL 2022-12-11 02:33:34 +01:00
sheaf bcd38ed791 clean up build steps & instructions 2022-12-04 15:52:29 +01:00
sheaf c80fdac30a switch to using eigen instead of hmatrix 2022-06-17 16:21:52 +02:00
sheaf 4e15380c7e use diagrams to parse MetaFont paths 2022-02-13 17:30:54 +01:00
sheaf 64e45f126b Refactor module hierarchy, use internal records 2022-02-11 22:05:13 +01:00
sheaf eba08a6edd add first-class functions to brush language 2021-05-25 13:45:21 +02:00
sheaf 5ff935b4b2 update render & select for new brush manipulation 2021-05-24 17:37:26 +02:00
sheaf 9f16cff978 fix brush join orientations 2021-05-13 22:07:49 +02:00
sheaf b46dc2a140 start reworking brush stroking 2021-05-10 18:02:42 +02:00
sheaf f8b0ec2ab1 adjust spline wither framework/selection deletion 2021-05-01 20:38:11 +02:00
sheaf a4bf83949a fix incorrect field name in stroke hierarchy deserialisation 2021-04-30 17:48:19 +02:00
sheaf d604d4120e stroke hierarchy 2021-04-26 17:18:48 +02:00
sheaf a5fdce1133 use Seq for strokes 2021-04-26 14:34:34 +02:00
sheaf e1c5d266eb embed brushes inline into strokes 2021-04-26 01:17:27 +02:00
sheaf 70cab39947 write cabal version number to .mb JSONs 2021-04-25 17:50:35 +02:00
sheaf 2ee0cbbfc0 fix styling on dialog windows 2021-04-25 15:22:10 +02:00
sheaf c3bcce58a7 use ?self to address pointer ownership warnings 2021-04-25 01:59:15 +02:00
sheaf 36a6a3ca4b Fix file chooser crashes 2021-04-21 18:14:35 +02:00
sheaf 1b0382f3b0 Switch to GTK4 2021-04-21 15:08:33 +00:00
sheaf 5e62937f16 fix preview for first curve in path 2021-02-25 14:43:43 +01:00
sheaf c6694e4e2f fix bug in reverseSpline 2021-02-25 14:04:54 +01:00
sheaf 46275514ff add stroke preview when drawing 2021-02-25 03:41:12 +01:00
sheaf 4788ab2efd fix bug in cubic Bézier subdivision 2021-02-25 00:07:15 +01:00
sheaf 212ac4fded use STRefs to hold cached outline data 2021-02-24 22:52:26 +01:00
sheaf 6dbade1fae always use current viewport sizes 2021-02-23 21:52:03 +01:00
sheaf c1cae2b69f compute outline data concurrently 2021-02-23 20:58:53 +01:00
sheaf b32499cc68 GHC 9.0 compatibility 2021-02-23 13:16:26 +01:00
sheaf ab3a12c983 use assertions instead of errors, minor linting 2020-11-15 06:28:48 +01:00
sheaf 1e4bb4bddc implement a basic brush store 
* each stroke stores the brushes it uses by reference,
    so that one can interactively edit brushes
    and see the strokes be updated in real-time
  * when writing to a file, we retrive the brush code
    from the reference, and include that information statically
 2020-11-14 23:32:23 +01:00
sheaf 393ef6f06e Implement programmable brush framework 2020-11-12 17:34:46 +00:00
sheaf a5ba7dcd33 use haskell-gi bugfix to improve tab reordering 2020-09-26 00:21:49 +02:00
sheaf 58ca70c1bd optimise root-finding functions 
* use PrimArray to represent polynomials
  * add some strictness annotations
  * turn on some optimisation flags
  * use quadratic formula for quadratic polynomials
 2020-09-19 00:43:07 +02:00