Using the Camera

To add support for the camera:

Start with the project you created in Transformation.

1.	Add this local variable under L_INT nRet; in the WndProc function:

VECTORCAMERA Camera;

2.	Add these lines right after the break; statement of case '-': in WM_CHAR:

case 'b':   
case 'B':   
   // flip camera projection between parallel and perspective   
   L_VecGetCamera ( &Vector, &Camera );   
   Camera.bPerspective = !Camera.bPerspective;   
   L_VecSetCamera ( &Vector, &Camera );   
   InvalidateRect( hWnd, NULL, FALSE );   
   break;   
case 'T':   
case 't':   
   // rotate the camera theta angle   
   L_VecGetCamera( &Vector, &Camera );   
   Camera.Theta += 5.0;   
   L_VecSetCamera( &Vector, &Camera );   
   InvalidateRect( hWnd, NULL, FALSE );   
   break;   
case 'P':   
case 'p':   
   // rotate the camera phi angle   
   L_VecGetCamera ( &Vector, &Camera );   
   Camera.Phi += 5.0;   
   L_VecSetCamera ( &Vector, &Camera );   
   InvalidateRect( hWnd, NULL, FALSE );   
   break;

3.	Compile and run the demo.
4.	Select File/Open from the program menu. Browse to c:\lead\images\random.dxf and click OK.
5.	Now you should be able to rotate the camera using the T and P keys on your keyboard, flip projection between parallel and perspective using the B key.

Help Version 19.0.2017.10.27

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