void
NavigateCurve::PanCamera(const int x, const int y)
{
vtkRenderWindowInteractor *rwi = Interactor;
if ((OldX != x) || (OldY != y))
{
//
// Determine the size of the window.
//
int size[2];
rwi->GetSize(size);
//
// Get the current view information.
//
VisWindow *vw = proxy;
double pan[2];
avtViewCurve newViewCurve = vw->GetViewCurve();
pan[0] = (double)(x - OldX) /
((newViewCurve.viewport[1] - newViewCurve.viewport[0]) *
(double)(size[0])) *
(newViewCurve.domain[1] - newViewCurve.domain[0]);
pan[1] = (double)(y - OldY) /
((newViewCurve.viewport[3] - newViewCurve.viewport[2]) *
(double)(size[1])) *
(newViewCurve.range[1] - newViewCurve.range[0]);
newViewCurve.domain[0] -= pan[0];
newViewCurve.domain[1] -= pan[0];
newViewCurve.range[0] -= pan[1];
newViewCurve.range[1] -= pan[1];
vw->SetViewCurve(newViewCurve);
OldX = x;
OldY = y;
rwi->Render();
}
}
void
ZoomCurve::ZoomCamera(const int x, const int y)
{
vtkRenderWindowInteractor *rwi = Interactor;
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 window.
//
VisWindow *vw = proxy;
avtViewCurve newViewCurve = vw->GetViewCurve();
double dX = ((1. / zoomFactor) - 1.) *
((newViewCurve.domain[1] - newViewCurve.domain[0]) / 2.);
double dY = ((1. / zoomFactor) - 1.) *
((newViewCurve.range[1] - newViewCurve.range[0]) / 2.);
newViewCurve.domain[0] -= dX;
newViewCurve.domain[1] += dX;
newViewCurve.range[0] -= dY;
newViewCurve.range[1] += dY;
vw->SetViewCurve(newViewCurve);
OldX = x;
OldY = y;
rwi->Render();
}
}
void
NavigateCurve::ZoomCamera(double f)
{
double zoomFactor = pow((double)1.1, f);
//
// Calculate the new parallel scale.
//
VisWindow *vw = proxy;
avtViewCurve newViewCurve = vw->GetViewCurve();
double dX = ((1. / zoomFactor) - 1.) *
((newViewCurve.domain[1] - newViewCurve.domain[0]) / 2.);
double dY = ((1. / zoomFactor) - 1.) *
((newViewCurve.range[1] - newViewCurve.range[0]) / 2.);
newViewCurve.domain[0] -= dX;
newViewCurve.domain[1] += dX;
newViewCurve.range[0] -= dY;
newViewCurve.range[1] += dY;
vw->SetViewCurve(newViewCurve);
}
void
ZoomCurve::ZoomCamera(void)
{
if (!SufficientDistanceMoved())
{
//
// This is a point, line, or very, very small rectangle.
//
return;
}
//
// Figure out the lower left and upper right hand corners in
// display space.
//
double leftX = (double) (anchorX < lastX ? anchorX : lastX);
double rightX = (double) (anchorX > lastX ? anchorX : lastX);
double bottomY = (double) (anchorY < lastY ? anchorY : lastY);
double topY = (double) (anchorY > lastY ? anchorY : lastY);
double dummyZ = 0.;
//
// Convert them to world coordinates.
//
vtkRenderer *canvas = proxy.GetCanvas();
canvas->DisplayToNormalizedDisplay(leftX, topY);
canvas->NormalizedDisplayToViewport(leftX, topY);
canvas->ViewportToNormalizedViewport(leftX, topY);
canvas->NormalizedViewportToView(leftX, topY, dummyZ);
canvas->ViewToWorld(leftX, topY, dummyZ);
canvas->DisplayToNormalizedDisplay(rightX, bottomY);
canvas->NormalizedDisplayToViewport(rightX, bottomY);
canvas->ViewportToNormalizedViewport(rightX, bottomY);
canvas->NormalizedViewportToView(rightX, bottomY, dummyZ);
canvas->ViewToWorld(rightX, bottomY, dummyZ);
//
// Set the new view window.
//
VisWindow *vw = proxy;
avtViewCurve newViewCurve=vw->GetViewCurve();
int size[2];
vtkRenderWindowInteractor *rwi = Interactor;
rwi->GetSize(size);
double s = newViewCurve.GetScaleFactor(size);
if (!controlKeyDown) // zoom
{
newViewCurve.domain[0] = leftX;
newViewCurve.domain[1] = rightX;
newViewCurve.range[0] = bottomY/s;
newViewCurve.range[1] = topY/s;
}
else // un-zoom
{
float win1[4], win2[4], win3[4], win4[4];
// window created by rubber band
win1[0] = leftX;
win1[1] = rightX;
win1[2] = bottomY;
win1[3] = topY;
float win1_w = win1[1] - win1[0];
float win1_h = win1[3] - win1[2];
// the current window
win2[0] = newViewCurve.domain[0];
win2[1] = newViewCurve.domain[1];
win2[2] = newViewCurve.range[0];
win2[3] = newViewCurve.range[1];
float win2_w = win2[1] - win2[0];
float win2_h = win2[3] - win2[2];
float scaleX = win1_w / win2_w;
float scaleY = win1_h / win2_h;
if (scaleY < scaleX)
{
float midX = (win2[0] + win2[1]) / 2.;
float halfw = (win2_h) * (win1_w / win1_h) / 2.;
win3[0] = midX - halfw;
win3[1] = midX + halfw;
win3[2] = win2[2];
win3[3] = win2[3];
}
else
{
float midY = (win2[2] + win2[3]) /2.;
float halfh = (win2_w) * (win1_h / win1_w) / 2.;
win3[0] = win2[0];
win3[1] = win2[1];
win3[2] = midY - halfh;
win3[3] = midY + halfh;
}
float win3_w = (win3[1] - win3[0]);
float win3_h = (win3[3] - win3[2]);
win4[0] = ((win1[0] - win2[0]) / win2_w) * win3_w + win3[0];
win4[1] = ((win1[1] - win2[0]) / win2_w) * win3_w + win3[0];
win4[2] = ((win1[2] - win2[2]) / win2_h) * win3_h + win3[2];
win4[3] = ((win1[3] - win2[2]) / win2_h) * win3_h + win3[2];
float win4_w = (win4[1] - win4[0]);
float win4_h = (win4[3] - win4[2]);
newViewCurve.domain[0] = (win3[0] - win4[0]) * win3_w / win4_w + win3[0];
newViewCurve.domain[1] = (win3[1] - win4[0]) * win3_w / win4_w + win3[0];
newViewCurve.range[0] = (win3[2] - win4[2]) * win3_h / win4_h + win3[2];
newViewCurve.range[1] = (win3[3] - win4[2]) * win3_h / win4_h + win3[2];
newViewCurve.range[0] /= s;
newViewCurve.range[1] /= s;
}
vw->SetViewCurve(newViewCurve);
//
// It looks like we need to explicitly re-render.
//
proxy.Render();
}