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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| gdi32.lib
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| None
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AngleArc
The AngleArc function draws a line segment and an arc. The line segment is drawn from the
current position to the beginning of the arc. The arc is drawn along the
perimeter of a circle with the given radius and center. The length of the arc is
defined by the given start and sweep angles.
BOOL AngleArc(
HDC hdc,
| // handle to device context
| int X,
| // x-coordinate of circle's center
| int Y,
| // y-coordinate of circle's center
| DWORD dwRadius,
| // circle's radius
| FLOAT eStartAngle,
| // arc's start angle
| FLOAT eSweepAngle
| // arc's sweep angle
| );
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Parameters
hdc
Identifies a device context.
X
Specifies the logical x-coordinate of the center of the circle.
Y
Specifies the logical y-coordinate of the center of the circle.
dwRadius
Specifies the radius, in logical units, of the circle. This value must be
positive.
eStartAngle
Specifies the start angle, in degrees, relative to the x-axis.
eSweepAngle
Specifies the sweep angle, in degrees, relative to the starting angle.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero.
Remarks
The AngleArc function moves the current position to the ending point of the arc.
The arc drawn by this function may appear to be elliptical, depending on the
current transformation and mapping mode. Before drawing the arc, AngleArc draws the line segment from the current position to the beginning of the arc.
The arc is drawn by constructing an imaginary circle around the specified
center point with the specified radius. The starting point of the arc is determined
by measuring counterclockwise from the x-axis of the circle by the number of
degrees in the start angle. The ending point is similarly located by measuring
counterclockwise from the starting point by the number of degrees in the sweep
angle.
If the sweep angle is greater than 360 degrees, the arc is swept multiple
times.
This function draws lines by using the current pen. The figure is not filled.
See Also
Arc, ArcTo, MoveToEx
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