Using the Camera
Start with the project you created in Transformation.
Take the following steps to add support for the camera:
1. |
Click the Class View tab in the project workspace. |
2. |
Click to open the "MyVectorWindow" branch to display the class member functions. |
3. |
Double click the MsgProcCallBack () member function. |
4. |
Add a local variable after the VECTORPOINT VecPoint declaration: |
VECTORCAMERA VecCamera;
5. |
Add the following cases to the switch(wParam) switch statement (immediately before the case 'x'): |
case 'b':
case 'B':
// flip camera projection between parallel and perspective
GetCamera(&VecCamera );
VecCamera.bPerspective = !VecCamera.bPerspective;
SetCamera(&VecCamera );
break;
case 'T':
case 't':
// rotate the camera theta angle
GetCamera(&VecCamera );
VecCamera.Theta += 5.0;
SetCamera(&VecCamera );
break;
case 'P':
case 'p':
// rotate the camera phi angle
GetCamera(&VecCamera );
VecCamera.Phi += 5.0;
SetCamera(&VecCamera );
break;
6. |
Compile and run the demo. |
7. |
From the program menu, browse to the "images" folder of your LEAD installation. Open the image random.dxf and click OK. |
8. |
Now you should be able to rotate the camera using the T and P keys on your keyboard, and flip projection between parallel and perspective using the B key. |