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activate grid button and widget size

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This commit is contained in:
AndreaRigoni
2026-03-17 22:56:56 +00:00
parent 553bb7fd61
commit 92a06f6274
7 changed files with 210 additions and 2 deletions
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37
src/Vtk/vtkHandlerWidget.cpp
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@@ -545,12 +545,37 @@ void vtkHandlerWidget::UpdateGizmoPosition() {
if (!this->Prop3D)
return;
// Calculate scaling factor: min(object_bbox, 1/5 of viewport)
double bboxSize = 1.0;
double bounds[6];
this->Prop3D->GetBounds(bounds);
if (vtkMath::AreBoundsInitialized(bounds)) {
bboxSize = std::max({bounds[1] - bounds[0], bounds[3] - bounds[2], bounds[5] - bounds[4]});
}
if (bboxSize < 1e-6) bboxSize = 1.0;
double screenLimit = bboxSize * 2.0; // Default if no renderer
if (this->CurrentRenderer) {
int *sz = this->CurrentRenderer->GetSize();
if (sz[1] > 0) {
double pixelSize = std::min(sz[0], sz[1]) / 5.0;
vtkCamera *cam = this->CurrentRenderer->GetActiveCamera();
if (cam->GetParallelProjection()) {
screenLimit = (pixelSize / (double)sz[1]) * 2.0 * cam->GetParallelScale();
} else {
double dist = cam->GetDistance();
double angleRad = vtkMath::Pi() * cam->GetViewAngle() / 180.0;
double viewHeightAtDist = 2.0 * dist * tan(angleRad / 2.0);
screenLimit = (pixelSize / (double)sz[1]) * viewHeightAtDist;
}
}
}
double scaleFactor = std::min(bboxSize, screenLimit);
vtkNew<vtkMatrix4x4> mat_gizmo;
mat_gizmo->Identity();
double center[3];
double bounds[6];
this->Prop3D->GetBounds(bounds);
center[0] = (bounds[0] + bounds[1]) / 2.0;
center[1] = (bounds[2] + bounds[3]) / 2.0;
center[2] = (bounds[4] + bounds[5]) / 2.0;
@@ -602,6 +627,13 @@ void vtkHandlerWidget::UpdateGizmoPosition() {
mat_gizmo->SetElement(2, 3, center[2]);
}
// Apply scaleFactor to the gizmo matrix (only top-left 3x3)
for (int j = 0; j < 3; ++j) {
for (int i = 0; i < 3; ++i) {
mat_gizmo->SetElement(i, j, mat_gizmo->GetElement(i, j) * scaleFactor);
}
}
m_AxesX->SetUserMatrix(mat_gizmo);
m_AxesY->SetUserMatrix(mat_gizmo);
m_AxesZ->SetUserMatrix(mat_gizmo);
@@ -635,6 +667,7 @@ void vtkHandlerWidget::UpdateGizmoPosition() {
// Orient RotCam actor to face 'dir'
vtkNew<vtkTransform> tcam;
tcam->PostMultiply();
tcam->Scale(scaleFactor, scaleFactor, scaleFactor);
// Default circle is in XY plane (Normal Z: 0,0,1)
double z[3] = {0, 0, 1};
double cross[3];