Gets the rotation angle for an annotation object.
virtual L_INT LAnnPointer::GetRotateAngle(pdAngle)
Pointer to a double variable to be updated with the rotation angle.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
Call this function to get the rotation angle for a particular annotation object.
The angle is in radians, and uses the following convention.
The possible range of rotate values is (-Pi) ... (Pi).
A rotation in the clockwise direction is considered a positive rotation.
A rotation in the counter-clockwise direction is considered a negative rotation.
For example, if a rectangle is rotated 90 degrees in the counter clockwise direction, this function will get (-PI/2) for the rotation angle. If a rectangle is rotated 90 degrees in the clockwise direction, this function will get PI/2 for the rotation angle. If a rectangle is rotated 270 degrees in the counter clockwise direction, this is equivalent to 90 degrees in the clockwise direction so the rotation value returned is PI/2.
// This examples displays the rotation angle of the Pointer annotation object in radians and degrees
L_INT LAnnPointer_GetRotateAngleExample(LAnnPointer * pLPointer)
nRet = pLPointer->GetRotateAngle(&dAngle);
if (nRet == SUCCESS)
wsprintf(szMsg, TEXT("Angle of rotation: Radians[%lf] Degrees[%f]\n"),
dAngle *180 / 3.1415926535
MessageBox(NULL, szMsg, TEXT(""), MB_OK);
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