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small fix to camera focal points

This commit is contained in:
Djairo Hougee 2024-05-05 23:25:08 +02:00
parent 0c32aaade1
commit ab0916b9c7
1 changed files with 19 additions and 11 deletions
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30
vtk/src/commands/CameraMoveCallback.cpp
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@ -12,11 +12,17 @@ using std::string;
void CameraMoveCallback::Execute(vtkObject *caller, unsigned long evId, void CameraMoveCallback::Execute(vtkObject *caller, unsigned long evId,
void *callData) { void *callData) {
// Note the use of reinterpret_cast to cast the caller to the expected type. // Note the use of reinterpret_cast to cast the caller to the expected type.
auto interactor = reinterpret_cast<vtkRenderWindowInteractor *>(caller); auto intr = reinterpret_cast<vtkRenderWindowInteractor *>(caller);
switch (evId) { switch (evId) {
case vtkCommand::KeyPressEvent: case vtkCommand::KeyPressEvent:
pan(interactor->GetKeySym()); if (not strcmp("minus", intr->GetKeySym())) {
zoom(false);
} else if (not strcmp("equal", intr->GetKeySym())) {
zoom(true);
} else {
pan(intr->GetKeySym());
}
break; break;
case vtkCommand::MouseWheelForwardEvent: case vtkCommand::MouseWheelForwardEvent:
zoom(true); zoom(true);
@ -27,18 +33,21 @@ void CameraMoveCallback::Execute(vtkObject *caller, unsigned long evId,
default: default:
break; break;
} }
// also calls the render function when the camera's position has not actually changed. This is a negligble inefficiency.
intr->GetRenderWindow()->Render();
} }
void CameraMoveCallback::zoom(const bool in) { void CameraMoveCallback::zoom(const bool in) {
double pos[3]; double scale = this->cam->GetParallelScale();
this->cam->GetPosition(pos);
if (in) { if (in) {
pos[2] -= 50; scale -= 1;
} else { } else {
pos[2] += 50; scale += 1;
} }
this->cam->SetPosition(pos);
this->cam->SetParallelScale(scale);
} }
@ -48,17 +57,16 @@ void CameraMoveCallback::pan(const string dir) {
if (dir == "Left" or dir == "h") { if (dir == "Left" or dir == "h") {
pos[0] -= 1; pos[0] -= 1;
this->cam->SetPosition(pos);
} else if (dir == "Up" or dir == "j" ) { } else if (dir == "Up" or dir == "j" ) {
pos[1] += 1; pos[1] += 1;
this->cam->SetPosition(pos);
} else if (dir == "Right" or dir == "k" ) { } else if (dir == "Right" or dir == "k" ) {
pos[0] += 1; pos[0] += 1;
this->cam->SetPosition(pos);
} else if (dir == "Down" or dir == "l" ) { } else if (dir == "Down" or dir == "l" ) {
pos[1] -= 1; pos[1] -= 1;
this->cam->SetPosition(pos);
} }
this->cam->SetPosition(pos);
this->cam->SetFocalPoint(pos[0], pos[1], 0);
} }
CameraMoveCallback::CameraMoveCallback() : cam(nullptr) {} CameraMoveCallback::CameraMoveCallback() : cam(nullptr) {}