clearpie
This function is used to clear a sector region.
void clearpie(
int left,
int top,
int right,
int bottom,
double stangle,
double endangle
);
Parameters
left
The upper-left-hand x-coordinate of the outer-cut rectangle of the oval where the fan is located.
top
The upper-left-hand y-coordinate of the outer-cut rectangle of the oval where the fan is located.
right
The lower-right x-coordinate of the outer-cut rectangle of the oval where the fan is located.
bottom
The lower-right x-coordinate of the outer-cut rectangle of the oval where the fan is located.
stangle
The radian of the starting angle of the fan.
endangle
The radian of the end angle of the fan.
Return Value
None
Remarks
The function uses the background color to clear the sector region.
Examples
None