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https://gitlab.com/sheaf/metabrush.git
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improvements to draw anchor
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sheaf
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3d36b39541
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3886dca483
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@ -5,6 +5,8 @@
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module Math.Bezier.Spline where
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-- base
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import Control.Monad
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( guard )
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import Data.Bifoldable
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( Bifoldable(..) )
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import Data.Bifunctor
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@ -290,11 +292,19 @@ splineEnd ( Spline { splineStart, splineCurves = OpenCurves curves } ) = case cu
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Empty -> splineStart
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_ :|> lastCurve -> openCurveEnd lastCurve
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catMaybesSpline :: crvData -> ptData -> Maybe ptData -> Maybe ptData -> ptData -> Spline Open crvData ptData
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catMaybesSpline dat p0 Nothing Nothing p3 = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( LineTo ( NextPoint p3 ) dat ) }
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catMaybesSpline dat p0 ( Just p1 ) Nothing p3 = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( Bezier2To p1 ( NextPoint p3 ) dat ) }
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catMaybesSpline dat p0 Nothing ( Just p2 ) p3 = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( Bezier2To p2 ( NextPoint p3 ) dat ) }
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catMaybesSpline dat p0 ( Just p1 ) ( Just p2 ) p3 = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( Bezier3To p1 p2 ( NextPoint p3 ) dat ) }
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catMaybesSpline :: ( ptData -> ptData -> Bool ) -> crvData -> ptData -> Maybe ptData -> Maybe ptData -> ptData -> Spline Open crvData ptData
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catMaybesSpline eq dat p0 mbCp1 mbCp2 p3 =
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let
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mbCp1' = do { cp1 <- mbCp1; guard ( not $ eq cp1 p0 ); return cp1 }
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mbCp2' = do { cp2 <- mbCp2; guard ( not $ eq cp2 p3 ); return cp2 }
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mbCp1'' = do { cp1 <- mbCp1'; guard ( case mbCp2' of { Just {} -> True ; Nothing -> not ( eq cp1 p3 ) } ); return cp1 }
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mbCp2'' = do { cp2 <- mbCp2'; guard ( case mbCp1' of { Just {} -> True ; Nothing -> not ( eq cp2 p0 ) } ); return cp2 }
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in go mbCp1'' mbCp2''
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where
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go Nothing Nothing = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( LineTo ( NextPoint p3 ) dat ) }
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go ( Just p1 ) Nothing = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( Bezier2To p1 ( NextPoint p3 ) dat ) }
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go Nothing ( Just p2 ) = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( Bezier2To p2 ( NextPoint p3 ) dat ) }
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go ( Just p1 ) ( Just p2 ) = Spline { splineStart = p0, splineCurves = OpenCurves $ Seq.singleton ( Bezier3To p1 p2 ( NextPoint p3 ) dat ) }
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-- | Connect two open curves.
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--
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@ -7,13 +7,15 @@ module MetaBrush.Application.Action where
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import Control.Arrow
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( second )
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import Control.Monad
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( guard, when, unless, void )
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( when, unless, void )
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import Data.Foldable
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( for_ )
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import Data.Function
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( on )
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import Data.List
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( uncons )
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import Data.Maybe
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( catMaybes, fromMaybe )
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( catMaybes, fromMaybe, isNothing )
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import Data.String
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( IsString )
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import Data.Traversable
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@ -943,11 +945,12 @@ instance HandleAction MouseClick where
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Nothing -> do
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( newDocument, drawAnchor ) <-
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getOrCreateDrawAnchor uniqueSupply pos doc
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let firstPos = anchorPos drawAnchor doc
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STM.writeTVar partialPathTVar
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( Just $ PartialPath
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{ partialPathAnchor = drawAnchor
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, partialControlPoint = Nothing
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, firstPoint = True
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, firstPoint = Just firstPos
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}
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)
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if anchorIsNew drawAnchor
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@ -966,8 +969,15 @@ instance HandleAction MouseClick where
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else
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pure Don'tModifyDoc
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-- Path already started: indicate that we are continuing a path.
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Just pp -> do
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STM.writeTVar partialPathTVar ( Just $ pp { firstPoint = False } )
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Just pp@( PartialPath { firstPoint = mbFirst } ) -> do
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let stillAtFirstPoint = case mbFirst of
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Nothing -> Nothing
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Just p ->
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if inPointClickRange zoom p pos
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then Just p
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else Nothing
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STM.writeTVar partialPathTVar
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( Just $ pp { firstPoint = stillAtFirstPoint } )
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pure Don'tModifyDoc
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BrushMode -> do
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-- Brush mode: modify brush parameters through brush widget.
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@ -1177,22 +1187,20 @@ instance HandleAction MouseRelease where
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| otherwise
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= ( pos, Nothing, Nothing )
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( _, otherAnchor ) <- getOrCreateDrawAnchor uniqueSupply pathPoint doc
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if not firstPoint && anchorsAreComplementary anchor otherAnchor
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if isNothing firstPoint && anchorsAreComplementary anchor otherAnchor
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-- Close path.
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then do
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STM.writeTVar partialPathTVar Nothing
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let
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newSegment :: Spline Open () ( PointData () )
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newSegment = catMaybesSpline ()
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newSegment = catMaybesSpline ( inPointClickRange zoom `on` coords ) ()
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( PointData p1 () )
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( do
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cp <- mbCp2
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guard ( cp /= p1 )
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pure ( PointData cp () )
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)
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( do
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cp <- mbControlPoint
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guard ( cp /= anchorPos otherAnchor doc )
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pure ( PointData cp () )
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)
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( PointData ( anchorPos otherAnchor doc ) () )
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@ -1202,37 +1210,35 @@ instance HandleAction MouseRelease where
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$ CloseStroke { closedStroke = anchorStroke anchor }
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pure ( UpdateDoc $ UpdateDocumentTo newDocument diff )
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else
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if firstPoint
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case firstPoint of
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-- Continue current partial path.
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then do
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STM.writeTVar partialPathTVar ( Just $ PartialPath anchor partialControlPoint False )
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pure Don'tModifyDoc
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Just {} -> do
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STM.writeTVar partialPathTVar ( Just $ PartialPath anchor partialControlPoint firstPoint )
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pure Don'tModifyDoc
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-- Finish current partial path.
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else do
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STM.writeTVar partialPathTVar ( Just $ PartialPath anchor partialControlPoint False )
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let
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newSegment :: Spline Open () ( PointData () )
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newSegment = catMaybesSpline ()
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( PointData p1 () )
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( do
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cp <- mbCp2
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guard ( cp /= p1 )
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pure ( PointData cp () )
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)
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( do
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cp <- mbControlPoint
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guard ( cp /= pathPoint )
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pure ( PointData cp () )
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)
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( PointData pathPoint () )
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newDocument :: Document
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newDocument = addToAnchor anchor newSegment doc
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diff = HistoryDiff $ ContentDiff
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$ ContinueStroke
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{ continuedStroke = anchorStroke anchor
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, newSegment
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}
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pure ( UpdateDoc $ UpdateDocumentTo newDocument diff )
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Nothing -> do
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STM.writeTVar partialPathTVar ( Just $ PartialPath anchor partialControlPoint Nothing )
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let
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newSegment :: Spline Open () ( PointData () )
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newSegment = catMaybesSpline ( inPointClickRange zoom `on` coords ) ()
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( PointData p1 () )
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( do
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cp <- mbCp2
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pure ( PointData cp () )
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)
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( do
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cp <- mbControlPoint
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pure ( PointData cp () )
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)
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( PointData pathPoint () )
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newDocument :: Document
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newDocument = addToAnchor anchor newSegment doc
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diff = HistoryDiff $ ContentDiff
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$ ContinueStroke
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{ continuedStroke = anchorStroke anchor
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, newSegment
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}
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pure ( UpdateDoc $ UpdateDocumentTo newDocument diff )
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BrushMode -> do
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STM.writeTVar mouseHoldTVar Nothing
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pure Don'tModifyDoc
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@ -185,7 +185,7 @@ data PartialPath
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= PartialPath
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{ partialPathAnchor :: !DrawAnchor
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, partialControlPoint :: !( Maybe ( ℝ 2 ) )
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, firstPoint :: !Bool
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, firstPoint :: !( Maybe ( ℝ 2 ) )
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}
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deriving stock Show
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@ -8,7 +8,7 @@ module MetaBrush.Render.Document
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-- base
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import Control.Monad
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( guard, when, unless )
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( when, unless )
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import Control.Monad.ST
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( RealWorld, ST )
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import Data.Coerce
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@ -17,6 +17,8 @@ import Data.Fixed
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( mod' )
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import Data.Foldable
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( for_, sequenceA_, traverse_ )
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import Data.Function
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( on )
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import Data.Functor.Compose
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( Compose(..) )
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import Data.Int
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@ -100,7 +102,9 @@ import MetaBrush.Document.Serialise
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( ) -- 'Serialisable' instances
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import MetaBrush.Draw
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import MetaBrush.Hover
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( mkAABB, HoverContext(..), Hoverable(..) )
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( HoverContext(..), Hoverable(..)
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, inPointClickRange, mkAABB
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)
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import MetaBrush.Records
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import MetaBrush.Stroke
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import MetaBrush.UI.ToolBar
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@ -183,24 +187,26 @@ getDocumentRender
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mbControlPoint :: Maybe ( ℝ 2 )
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( mbFinalPoint, mbControlPoint )
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| Just ( DrawHold holdPos ) <- mbHoldEvent
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= if firstPoint
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then ( mbMousePos , Just holdPos )
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else ( Just holdPos, ( \ cp -> ( cp --> holdPos :: T ( ℝ 2 ) ) • holdPos ) <$> mbMousePos )
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= case firstPoint of
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Just {} -> ( mbMousePos , Nothing )
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Nothing -> ( Just holdPos
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, do { cp <- mbMousePos
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; return $ ( cp --> holdPos :: T ( ℝ 2 ) ) • holdPos
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}
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)
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| otherwise
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= ( mbMousePos, Nothing )
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, Just finalPoint <- mbFinalPoint
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, let
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previewSpline :: Spline Open () ( PointData () )
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previewSpline = catMaybesSpline ()
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previewSpline = catMaybesSpline ( inPointClickRange zoom `on` coords ) ()
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( PointData p0 () )
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( do
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cp <- cp0
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guard ( cp /= p0 )
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pure ( PointData cp () )
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)
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( do
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cp <- mbControlPoint
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guard ( cp /= finalPoint )
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pure ( PointData cp () )
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)
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( PointData finalPoint () )
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