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    Canvas ArcTo confusion Asked 13 years, 10 months ago Modified 10 years, 9 months ago Viewed 5k times
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    Zero degrees is at the 3 o'clock position, and I had believed that the specified angle was measured between that and a line from the center point to the point on the arc edge Clearly, something else is going on that I don't understand and doesn't appear to be documented in the QPainter::arcTo description This is an issue because I'm writing code to reshape the arc, and I need to be able to
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    I want to place two small circles on an SVG and then draw an arc or curve between them Based on the documentation, I believe arcTo would be the best fit for this since I know the start and end points For the life of me I cannot get it to draw the arc The circles are drawn perfectly every time though
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    As you noted, ArcTo cannot draw a complete ellipse In fact it becomes numerically unstable as you attempt to reduce the "flat" area Another consideration is that arc drawing is slower than Bezier drawing on modern hardware This most modern systems use four bezier curves to approximate an ellipse rather than drawing a true ellipse You can see that WPF's EllipseGeometry does this by
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