Interaction with 3D scene?

[ghost]

Hello. I have in my experimental renderer (based on ray tracing) basic camera control. How to cross-connect camera control (mouse and keyboard) with GUI?

Yes, in simple situation may be bind with callback, but in this situation needs additional hit test (on cursor in gui).

[ratchetfreak]

check WantCaptureKeyboard and WantCaptureMouse those will tell you when an imgui widget wants input focus and there are methods to turn it off the next frame for when you want to drag the mouse behind a window.

[ocornut]

This is mostly under your control.

You can decide that when clicking a view you'd stop giving a mouse position to ImGui until another action is performed (e.g. pressing escape, or right mouse-click). ImGui will use the mouse input position if it is provided. So maybe your application needs a flag to track whether inputs are passed to imgui or not?

Pseudo code,

if (InvisibleButton(...)) // clicked viewport
{
  m_myapp_input_goes_to_game = true;
}

if (m_myapp_input_goes_to_game && MyAppKeyPressed(ESC))
{
  m_myapp_input_goes_to_game = false;
  HideCursor();
}
else
{
   ShowCursor();
   // pass inputs to imgui
}

[ocornut]

@acterhd Shall we keep this issue open?

[ghost]

I'm in thinking...
I'm interesting about GUI scaling, why blurry.

[ocornut]

Closing this until you have a specific related query.
GUI scaling/blurryness would be a different topic.