When running a simulation with FhVis, you control a virtual camera in the 3D scene. This page lists the keyboard shortcuts available while the simulation is running. FhSimUI renders the same scene through SDL2 and shares the global-axis and target-viewpoint keys, but its camera bindings and modifier keys differ; its user interface is described under FhSimUI overlays (ImGui).

Note: The first time a program is run with visualisation, an Ogre3D dialog may pop up where you can set your preferred view settings. To change the settings later, delete the file ogre.cfg in the resources subdirectory.

Movement of camera along local axes

Shortcut	Function
W	Moves the camera forward
S	Moves the camera backward
A	Moves the camera left
D	Moves the camera right
Q	Moves the camera up
E	Moves the camera down

Movement of camera along global axes

Shortcut	Function
Numpad 7	Moves the camera along positive x-axis
Numpad 4	Moves the camera along negative x-axis
Numpad 8	Moves the camera along positive y-axis
Numpad 5	Moves the camera along negative y-axis
Numpad 9	Moves the camera along positive z-axis
Numpad 6	Moves the camera along negative z-axis

Choice of target viewpoint

Shortcut	Function
1 - 9	Selects a target to use as a target viewpoint
0	De-selects target to use as a target viewpoint

Speed of camera movement

Shortcut	Function
<Left shift>	Increase camera speed
<Left ctrl>	Decrease camera speed
<Tab>	Resets camera speed

Camera view direction (only if no target viewpoint is set)

Shortcut	Function
<Arrow up>	Increase elevation
<Arrow down>	Decrease elevation
<Arrow left>	Look to the left
<Arrow right>	Look to the right

Special keys

Shortcut	Function
X	Toggles mesh or surface view
C	Toggles view of origin axes
V	Decreases the size of the origin axes
B	Increases the size of the origin axes
<esc>	Quits the simulation

FhSimUI overlays (ImGui)

The interactive overlays are a feature of FhSimUI, the SDL2 front end — not of FhVis. They are reached from the menu bar at the top of the window, and each has a function-key shortcut:

Shortcut	Overlay
F2	Load Input File (the file browser)
F3	Sim Controls
F4	Inspector — state and port values for the selected object
F5	Signal Plots — live plots of selected signals
F6	Console Log
F7	Simulation Log
F8	OGRE Log

The Debug menu additionally opens a Jacobian Debugger, which shows the structure and values of the system Jacobian — useful when debugging implicit integration.

Camera input is suspended while an ImGui widget wants the keyboard, so typing in the console or inspector does not move the camera.

See FhSimUI — the interactive front end for the command-line flags that control these overlays (--no-gui-console, --gui-console-only, --headless).