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QuickTime 4 Reference

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Creating Paths Using Only Off-Curve Points

The next example shows how you can create a path using only off-curve control points. The path defined in this example contains four control points, and the controlBits field is set to

which indicates that the first four points are off curve. The path contains only four points, and therefore they are all off curve.

The four off-curve control points in this example form a square; the path that they define is a rounded square, as shown in Figure 12 .

Figure 12 A round path shape

Notice that the path is filled with the even-odd shape fill, which is the default for path shapes. You could, however, specify any shape fill for this path except the open-frame shape fill. The open-frame shape fill requires that the first and last points of the contour be on-curve points, and this path has no on-curve points.

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