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The coordinates are transformed by the current transform as they are added to the path. arcTo (x1 As Double, y1 As Double, x2 As Double, y2 As Double, Radius As Double) As String Adds an arc to the next point (x2, y2) in the current path x1, y1 coordinates of point 1 x2, y2 coordinates of point 2
link: Hello Klaus! To find the Centroid of this figure? regards...
link: Sorry for answering only today, but I was very busy the last two days. I suggest you to ask the question in the questions forum, in a new thread, as i

Waited long time to figure out how to erase objects drawn on table Here is some simple efficient way to clear the canvas How did I do it ? -save the picture copy when the user starts new project -clippath with canvas.clippath to a rectangle boundary -draw the saved copy of original to the current
link: NEW !!!! Erase the drawing with a defined boundary rectangle done by clip path to a rectangle and draw a project clone bitmap over the curent proeject
link: I did not knew what it can be done with canvas Here is the new function I bring to the app : SNAP to points SNAP accuracy dip units grid space dip un
link: ORTHO FUNCTION AND SNAP ... the beauty of canvas over b4a video on first post

It has nothing to do with invalidation. It is possible that DrawPath is slow as it requires clipping the canvas. DrawPolygon is not the same as DrawPath. B4XCanvas and Canvas have the exact same performance characteristics.
link: Regarding the posted slowdown... The culprit seems to be drawpath that updates the canvas/image at every usage. @Erel, can you confirm (by looking
link: It is not related to DrawPath. JavaFX Canvas object "auto invalidates". There is no invalidate method in jFX. B4XCanvas.Invalidate doesn't do anything
link: Anyway BitmapCreator on B4J is much faster then Canvas, the procedures of DrawPath that I put in code snippet (here) ere very fast. I'll probably make

Clear (Color As Int) As Clear the full canvas with the given color. ClearTargetRect As This is a short hand of cvs.ClearRect(cvs.TargetRect) ClearRect (Rect As B4XRect) As Clears the given rectangle. Does not work with clipped paths. ClipPath (Path As B4XPath) As Clips the drawings to a closed p

(targetWidth - 5)/2); Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, targetHeight, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(targetBitmap); Path path = new Path(); path.addCircle(((float) targetWidth - 1) / 2, ((float) targetHeight -

Hi! I'm having a question about ImageView, Canvas and DrawPath(). I want to draw multiple lines with DrawPath with this Code (see also attachment for a demo): Dim canvas1 As Canvas canvas1.Initialize(ImageView1) Dim PolygonPath As Path PolygonPath.Initialize (64,154) PolygonPath.LineTo (113,234)
link: Hi Klaus, thanks a lot. Great demo!!! Polygon: you are right, it is a polyline (-> copy&paste-error). Ok, it's good to know about the B4A-canvas-li
link: What exactly do you want to achieve? Clipping is used if you want to limit the surface of the drawing. Your PolygonPath is not a polygon, its a polyl

Great @Daestrum , but I don't know how apply it, B4XPath is a wrapper of Path2D or just a part of it ? How to apply here ? 'Clips the drawings to a closed path. Sub ClipPath (Path As B4XPath) CommitCommand(Array("ClipPath", Path)) End Sub Note that this is a first sub called by the Main, so no
link: Ok, not different than mine: 'Clips the drawings to a closed path. Sub ClipPath (Path As B4XPath) Dim o As Object = Array As B4XPath(Path) Com
link: I still search to know how implement it here: 'Clips the drawings to a closed path. Sub ClipPath (Path As B4XPath) CommitCommand(Array("ClipPath",
link: I can draw lines, rectangles, circles, texts and more, but any method that use B4XPath fails compilation with this error: Involved methods are: 'Clip

Left = innerView.Left + x - downx innerView.Top = innerView.Top + y - downy TouchPanelOverBubble.Left = innerView.Left TouchPanelOverBubble.Top = innerView.Top BubbleMoved End If Return True End Sub private Sub BubbleMoved cvs.ClearRect(cvs.TargetRect)
link: Use the attached modified class.

Si solo te dibuja una parte es posible que hayas utilizado el método "ClipPath" del canvas. Si es así, antes del "Canvas.DrawColor" deberías poner un "Canvas.RemoveClip" para que el canvas vuelva a apuntar a toda la area de dibujo. En cuanto a la segunda pregunta, la correcta es la primera. El "btn

Thanks Erel, i have found this solution a bit before you wrote yours: The two methods are not mine, took them from one of your old answers. Looking for the fastest way, but it works well enough. Dim circle As Path circle.Initialize(ImageSize/2, ImageSize/2) Dim radius As Float = ImageSi
link: There are all kinds of ways to do it. A method that will work with all shapes and cut the bitmap based on a "mask" image: https://www.b4x.-to-select-t
link: Hello, Im looking for a way to cutout a circle from a canvas. What im doing exacly is generating in a canvas, red and green dots to simulate 3D (vis

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