TCanvas.AngleArc procedure
Draws a circular arc over a specified angle.
Declaration
procedure AngleArc(X: Integer; Y: Integer; Radius: LongWord;
StartAngle: Single; SweepAngle: Single)Arguments
X | Horizontal coordinate of the center of the circle. |
Y | Vertical coordinate of the center of the circle. |
Radius | Distance from the center point to the circumference of the circle. |
StartAngle | Angle (in degrees) relative to the X-Axis where the arc is started. |
SweepAngle | Angle (in degrees) relative to StartAngle where the arc ends. |
Description
AngleArc is a method used to draw an arc over a specified angle
along the circumference of a circle with given radius and center point.
X and
Y contain the coordinates of the center of the
circle along which the arc is drawn.
Radius is the distance from the center point of the circle to the
circumference where the arc is drawn. The LongWord type can contain positive
integer values in the range 0..4294967295.
StartAngle and
SweepAngle indicate where the arc is
drawn on the circumference of the circle. The angle values are specified in
degrees.
StartAngle contains the angle to the starting point on the circumference. Its value is relative to the X-Axis and increments in counter-clockwise direction.
SweepAngle defines the length of the arc expressed in degrees, and is used to find the ending point for the arc. Its value is relative to the starting point, and increases in counter-clockwise direction.
Before the arc is drawn, LineTo is used to drawn a line from the current pen position to the starting point of the arc.
The Arc method is called to render the arc using the center point, radius, starting point, and ending point values.
After the arc is drawn, the Pen position is moved to the ending point for the arc.
Update values for the Pen style, mode, color or width prior to calling the method.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.