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Gets the rotation angle for an annotation object.
#include "l_bitmap.h"
L_LTANN_API L_INT L_AnnGetRotateAngle(hObject, pdAngle)
Handle to the annotation object.
Pointer to a double variable to be updated with the rotation angle.
| Value | Meaning |
|---|---|
| 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 function is only valid for the following annotation object types:
If the function is used with an object that is not listed, it returns SUCCESS with *pdAngle equal to 0.
Win32, x64.
This example gets the rotation angle for the annotation hObject in radians and degrees.
L_INT AnnGetRotateAngleExample(HANNOBJECT hObject){L_INT nRet;L_DOUBLE dAngle;L_TCHAR szMsg[200];nRet = L_AnnGetRotateAngle(hObject, &dAngle);if (nRet == SUCCESS){_stprintf_s(szMsg, TEXT("Angle of rotation: Radians[%lf] Degrees[%f]\n"), dAngle, dAngle * 180 / 3.1415926535);_tprintf(_T("%s"), szMsg);}return nRet;}
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