C++ (Cpp) VisWindow::GetView3D示例

void
Zoom3D::ZoomCamera(const int x, const int y)
{
    if (OldY != y)
    {
        //
        // Calculate the zoom factor.
        //
        double dyf = MotionFactor * (double)(y - OldY) /
                         (double)(Center[1]);
        double zoomFactor = pow((double)1.1, dyf);

        //
        // Calculate the new parallel scale.
        //
        VisWindow *vw = proxy;

        avtView3D newView3D = vw->GetView3D();

        newView3D.imageZoom = newView3D.imageZoom * zoomFactor;

        OldX = x;
        OldY = y;

        vw->SetView3D(newView3D);
    }
}

示例#2

显示文件

文件： Zoom3D.C 项目： burlen/visit_vtk_7_src

void
Zoom3D::ZoomCamera(void)
{
    vtkRenderWindowInteractor *rwi = Interactor;

    if (!SufficientDistanceMoved())
    {
        //
        // This is a point, line, or very, very small rectangle
        //
        return;
    }

    //
    // Determine the size of the window.
    //
    int       size[2];

    rwi->GetSize(size);

    //
    // Get the current view information.
    //
    VisWindow *vw = proxy;

    //
    // Set the new image pan and image zoom.
    //
    double    zoomFactor;
    double    pan[2];

    avtView3D newView3D = vw->GetView3D();

    if (!controlKeyDown) // zoom
    {
        pan[0] = (((double)(anchorX + lastX - size[0])) / (2.0 * (double)size[0]))
             / newView3D.imageZoom;
        pan[1] = (((double)(anchorY + lastY - size[1])) / (2.0 * (double)size[1]))
             / newView3D.imageZoom;
        zoomFactor = fabs((double)(anchorY - lastY)) / (double) size[1];

        newView3D.imagePan[0] -= pan[0];
        newView3D.imagePan[1] -= pan[1];
        newView3D.imageZoom = newView3D.imageZoom / zoomFactor;
    }
    else  // unzoom
    {
        zoomFactor = fabs((double)(anchorY - lastY)) / (double) size[1];
        newView3D.imageZoom = newView3D.imageZoom * zoomFactor;

        pan[0] = (((double)(anchorX + lastX - size[0])) / (2.0 * (double)size[0]))
             / newView3D.imageZoom;
        pan[1] = (((double)(anchorY + lastY - size[1])) / (2.0 * (double)size[1]))
             / newView3D.imageZoom;

        newView3D.imagePan[0] += pan[0];
        newView3D.imagePan[1] += pan[1];
    }

    vw->SetView3D(newView3D);
}