Version 1.9 Build 1367

News	FAQ
Search	Home

Next: Conceptually Complicated and Uncleanly Divided Up: No Title Previous: No Title

The Coordinate System is Cumbersome

Any application programmer must know a lot about the underlying conceptual structure of the Image and its three coordinate systems. For example, if I want to set the parameters associated with a coordinate system, I must write something like

    nx = outImage.GetDim(1); ny = outImage.GetDim(2);

    CoordSys *myCoords = outImage.GetCoordSys();

    ImageCoord myDelta = myCoords.GetDeltaCoord();
    double xcell = myDelta.GetImageCoord(1);
    double ycell = myDelta.GetImageCoord(2);

    ImPixelCoord myRefPix = myCoords.GetRefPix();
    double xrefpix = myRefPix.GetImPixCoord(1);
    double yrefpix = myRefPix.GetImPixCoord(2);
                   .
                   .

while in the system SDE the analogous operation is implemented with a single line of code:

CALL CRDPUT (IMAGE, NAX, TYPE, NAXIS, RVAL, RPIX, DELT, ROTA)

Next: Conceptually Complicated and Uncleanly Divided Up: No Title Previous: No Title