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Questions tagged [cgpath]

A graphics path is a mathematical description of a series of shapes or lines. CGPath defines an opaque type that represents an immutable graphics path.The issue related with this tag can be tagged using [tag:CGPath] in iOS

CGPath is available in apple "CoreGraphics" framework.CGPaths are how CoreGraphics describes the bezier paths it uses for drawing to the screen. They can go a long way to unlocking some of the power of CoreGraphics.

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446 questions
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How to use CGPathApply properly

I'm trying to use CGPathApply to iterate over each CGPathElement in a CGPathRef object (mainly to write a custom way to persist CGPath data). The problem is, each time it get to the call to CGPathApply, my program crashes without any information at…
Eric
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Trim/subtract CGPath from CGPath?

I have some CGPath (a poly with two circle) carried out on a CAShapeLayer. Can I trim/subtract paths like this?
Geri Borbás
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Finding the center of a CGPath

I have an arbitrary CGPath and I'd like to find it's geographic center. I can get the path bounding box with CGPathGetPathBoundingBox and then find the center of that box. But is there a better way to find the center of a path? Update for those who…
EFC
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CGPath copy lineJoin and miterLimit has no apparent affect

I am offsetting a CGPath using copy(strokingWithWidth:lineCap:lineJoin:miterLimit:transform‌​:). The problem is the offset path introduces all kinds of jagged lines that seem to be the result of a miter join. Changing the miterLimit to 0 has no…
Jeshua Lacock
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CGPath with outline

I am trying to draw a CGPath that has a stroke for it's stroke. Basically I want a draw a line using CGPath. I then want to go back and draw lines on both sides of the last CGPath giving it the effect that it is outlines. This line can bend and…
endy
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CAShapeLayer Animating Path Glitches / Flickers (From Ellipse to Rect and back)

I am running into an issue when I create an explicit animation to change the value of a CAShapeLayer's path from an ellipse to a rect. In my canvas controller I setup a basic CAShapeLayer and add it to the root view's layer: CAShapeLayer…
C4 - Travis
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Masking CGContext with a CGPathRef?

I am doing some drawing using a CGContext. I am currently masking the drawing using a png file like this: UIImage * myImage = [UIImage imageNamed:@"frame.png"]; CGContextRef context = UIGraphicsGetCurrentContext (); CGContextClipToMask(context,…
Frank
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Making a half circle path with CGPath, and follow the path with SKAction

I have no idea how to make a half circle path with CGPath. There is the code i have: let path = CGPathCreateMutable() let Width: CGFloat = 38.0 let radius: CGFloat = (Width / 2.0) + (Treshold / 2.0) CGPathAddArc(pathOne, nil, x, 0.0,…
Nurassyl Nuridin
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Create endless cgpath without framedrops

I need to create a cgpath continuously. At the moment I do it like that: func createLine(){ var rand = randomBetweenNumbers(1, 2) currentY-- if rand < 1.5{ currentX-- CGPathAddLineToPoint(leftPath,…
Christian
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draw an arc clockwise in iOS results in unclockwise arc

I use the following code to draw an arc in the lower half of a circle. According to documentation in Apple: This method creates an open subpath. The created arc lies on the perimeter of the specified circle. When drawn in the default …
Pegah
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Getting CGPath for an image with Alpha channel

How can I get the outline of the image as a CGPath? For example, how can I get the outline of the Google logo (which has an transparent background). This might be slightly complex case. So a solution to handle less complex scenarios will work (for…
Mustafa
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3 answers

How can I combine UIBezierPath drawings?

I'm trying to combine several UIBezierPath drawings. I have different types of drawings I can make (line, cubic bezier, quadratic beziers), and each of these can be filled or unfilled. I'm selecting the drawing type randomly, and my goal is to make…
pikovayadama
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How to create a random closed smooth CGPath?

I am trying to find a way to create a random closed smooth path (CGPath or UIBezierPath). I have read about the De Casteljau's algorithm and tons other articles about Bezier paths but it does not seem to fit to what I try to achieve. I thought about…
Rafał Sroka
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CGPathRef from string

Please how can we get path of particular arabic of french letter ? I've just found out that CTFontCreatePathForGlyph will give CGPathRef like, but its will be the outline of text . I need this real text path for showing a text drawing…
abdel ali
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CGPath as a string

Is there any way to get at the actual data of a CGPath, so it can be saved to a file and restored later? And is there any documentation on how that data is structured? I would like to write it as a string (like a SVG path string), or some way with…
user1082474
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