LAnnEncrypt::GetRotateAngle (original) (raw)
Summary
Gets the rotation angle for an annotation object.
Syntax
#include "ltwrappr.h"
virtual L_INT LAnnEncrypt::GetRotateAngle(pdAngle)
Parameters
L_DOUBLE *pdAngle
Pointer to a double variable to be updated with the rotation angle.
Returns
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
Comments
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.
Required DLLs and Libraries
- LTANN
- For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.
Platforms
Win32, x64.
See Also
Functions
Topics
- Annotation Functions: Object Properties
- Implementing Annotations
- Automated User Interface for Annotations
- Annotation Functions: Creating and Deleting Annotations
- Types of Annotations
Example
// This examples displays the rotation angle of the Encrypt annotation object in radians and degrees.
L_INT LAnnEncrypt_GetRotateAngleExample(LAnnEncrypt * pLEncrypt)
{
L_INT nRet;
L_DOUBLE dAngle;
L_TCHAR szMsg[200];
nRet = pLEncrypt->GetRotateAngle(&dAngle);
if (nRet == SUCCESS)
{
wsprintf(szMsg, TEXT("Angle of rotation: Radians[%lf] Degrees[%f]\n"),
dAngle,
dAngle *180 / 3.1415926535
);
MessageBox(NULL, szMsg, TEXT(""), MB_OK);
}
else
return nRet;
return SUCCESS;
}
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