LBitmapBase::PointFromBitmap
#include "ltwrappr.h"
virtual L_INT LBitmapBase::PointFromBitmap(nViewPerspective, px, py)
L_INT nViewPerspective; |
/* destination view perspective */ |
/* address of the x coordinate variable */ | |
/* address of the y coordinate variable */ |
Translates a point (x,y) from the class object's bitmap view perspective to the specified view perspective.
Parameter |
Description |
nViewPerspective |
Destination view perspective to which the point should be translated. |
px |
Address of variable for the X coordinate of the point. |
py |
Address of variable for the Y coordinate of the point. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
To use this function, do the following:
1. |
Declare variables for the X and Y coordinates of a point. |
2. |
Assign the values of a known point in the bitmap. |
3. |
Call this function, passing the addresses of the variables, and specifying the destination view perspective. (The function gets the source view perspective from the bitmap handle.) |
4. |
Get the translated point from the variables, which this function has updated. |
For general information about view perspectives, refer to Accounting for View Perspective.
Required DLLs and Libraries
LTDIS For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
Elements: |
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Topics: |
Example
LBitmapBase MyBitmap;
L_INT npx=20, npy=30;
MyBitmap.Load(TEXT("image1.cmp"),24);
MyBitmap.PointFromBitmap(BOTTOM_LEFT, &npx, &npy);