Gets the current view port.
#include "ltwrappr.h"
virtual L_INT LVectorBase::GetViewport(pViewport)
Pointer to a RECT structure to be updated with the current view port data.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Use this function to get the view port associated with the vector handle.
If the vector is attached to a window, you must call this function when processing WM_SIZE messages, since the VECTOR library needs to know when the double buffer mode is selected.
This function and LVectorBase::SetCamera are required to complete the projection process from the vector image onto a 2D surface.
L_INT LVectorBase__GetViewportExample(HWND hWnd)
{
L_INT nRet;
RECT viewportRect;
L_TCHAR szTemp[100];
LVectorBase Vector;
nRet = Vector.Load(MAKE_IMAGE_PATH(TEXT("random.dxf")));
if(nRet != SUCCESS)
return nRet;
nRet = Vector.GetViewport(&viewportRect);
if(nRet != SUCCESS)
return nRet;
wsprintf(szTemp,
TEXT("Old View Port (%d,%d) (%d,%d)"),
viewportRect.left,
viewportRect.top,
viewportRect.right,
viewportRect.bottom);
MessageBox(hWnd, szTemp, TEXT(""), MB_OK);
viewportRect.left = 0;
viewportRect.top = 0;
viewportRect.right = 200;
viewportRect.bottom = 200;
nRet = Vector.SetViewport(&viewportRect);
if(nRet != SUCCESS)
return nRet;
wsprintf(szTemp,
TEXT("New View Port (%d,%d) (%d,%d)"),
viewportRect.left,
viewportRect.top,
viewportRect.right,
viewportRect.bottom);
MessageBox(hWnd, szTemp, TEXT(""), MB_OK);
return SUCCESS;
}
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