Advanced Zooming with GTest

This tutorial is made by Jan H. Simon.
This is my first tutorial and it's based on the "Zoom Field Of View" Tutorial by Vexator!
I'm german so don't get worried about my english!
It's all about making different Zoom-Levels. In my example "Near" and "Far".
I used it with an isometric view, but you can use it for 1st or 3d Person Cam as you want!
And all the changes are made in Client.C!

First, we'll add a few variables at the top of client.c right after:

static int32 CurAvg;

// added

float ZoomMultiplikator = 1.0;
geBoolean FirstTime = GE_TRUE;
geBoolean ZoomMode = GE_FALSE;
geBoolean Stop = GE_TRUE;

// end added

Now in the SetupCamere function still in client.c ( I wrote the whole block so just overwrite your fuction code with mine! ):

//=====================================================================================
// SetupCamera
//=====================================================================================
static void SetupCamera(geCamera *Camera, geRect *Rect, geXForm3d *XForm)

{

    geCamera_SetWorldSpaceXForm(Camera, XForm);

    geCamera_SetAttributes(Camera, 2.0f*ZoomMultiplikator, Rect);

}

and then in the Client_SendMove function:


// Do misc move actions
if (NewKeyDown(KeyLut[VK_RBUTTON], hWnd))
ButtonBits |= HOST_BUTTON_JUMP;

if (IsKeyDown(KeyLut[VK_LBUTTON], hWnd))
{
    ButtonBits |= HOST_BUTTON_FIRE;
}

// added

if (IsKeyDown(KeyLut[VK_MBUTTON], hWnd))

{

    if (Stop)
    {
        ZoomMode = !ZoomMode;
        if (ZoomMode)
        {
            ZoomMultiplikator = 2.5; // Zoom camera in
            if (FirstTime)
            {
                PlaySound ("wav/zoom_on.wav", NULL, SND_ASYNC);
                FirstTime = GE_FALSE;
            }
        }
        if (!ZoomMode)
        {
            FirstTime = GE_TRUE;
            ZoomMultiplikator = 1.0;
            PlaySound ("wav/zoom_off.wav", NULL, SND_ASYNC);
        }
        Stop = GE_FALSE;
    }
}

else

Stop = GE_TRUE;

// end added

if (IsKeyDown('1', hWnd))
{
    Client->CurrentWeapon = 0;
}

Now just save the code, add a sound at "Genesis3d11/wav/zoom_on.wav" and one in the same place called "zoom_off.wav", compile the code and ready!

I hope it works but I think that it is VERY easy, too!

If you have any requests, ideas or alternatives ... mail me @ datenfunk@t-online.de!

Jan H. Simon