Appendix C — Cheat Sheet

Every Event and Action Chess uses, with what it does in one line, in Myth’s own words.

C.1 Events

2D Direction Pressed: Runs once when the selected Left, Right, Up, or Down direction is pressed.
Command Pressed: Runs once when the selected Button Command matches its Single, Double, or Triple Press pattern.
Create: Runs once when an instance is created.
Custom Event: Runs when another action or script triggers the selected named custom event.
Draw: Runs when the instance should draw custom visuals or UI text.
Game Start: Runs once when the game starts.
Game State Changed: Runs after the singular project Game State changes.
Mouse Pressed on Object: Runs once when a mouse button is newly pressed over this instance.
Recurring Timer: Runs each time the named recurring timer comes due.
Scene Start: Runs when the scene starts.
UI Activated: Runs on this UI Object when the player activates its button or confirms one of its menu rows.

C.2 Actions

Change Component Value: Changes one mutable Object Component value through its direct path.
Change Sprite Tint Property: Changes exactly one persistent sprite-tint property while preserving every unrelated tint setting.
Change Variable: Changes one declared variable: a Local Variable of this Logic (private to this Logic Component, or to this call of a Function), a Per Instance Variable of the targeted Object (self.name), a Changeable Shared Variable (@self.name, @Guard.name: one value for every instance of that Object), or a Global.
Check Data Row Exists: Checks whether the Data Table has that row.
Check Game State: Runs nested actions while the singular project Game State matches the selected value.
Check Save Exists: True when the named save slot exists — show a “Continue” button only when there is something to continue.
Control Data Row: Adds or updates one Data Table row, or removes it.
Control Menu: Opens one navigable UI menu or closes the named or top menu without changing its world-pause state.
Create Instance: Creates one instance at world XYZ, Self-relative XYZ, or an exact named Coordinate, and names it (Created As).
Declare Variable: Brings a Local Variable into existence.
Delete Save: Deletes one named save slot.
Draw Line: Draws one line with the current Draw Color.
Else: Runs the Else action.
If: Runs its Then branch when its Condition is true.
Load Game: Validates and loads one named save slot.
Load Persistent Value: Reads a device-persisted value, or the Default if none is stored yet, and publishes one typed Action result.
Repeat: Runs its vertical child stack Count times.
Reset Data Table: Restores a Data Table to exactly what was authored in the editor, discarding every runtime change.
Restart Game: Restarts the complete game from its configured start scene.
Return: Ends this run here.
Run Code (JS): Runs one inline JavaScript snippet in the current event context.
Save Game: Writes the current game state to one named slot.
Save Persistent Value: Writes one device-persistent value under one title-scoped key.
Set Alpha: Sets alpha for the target or game.
Set Data Cell: Writes one cell of a Data Table row (the live game copy, not the authored resource).
Set Draw Color: Sets the color used by later draw actions.
Set Frame: Sets frame for the target or game.
Set Game State: Changes the singular project-wide Game State and runs Game State Changed when the value changes.
Set Input Context Active: Activates or deactivates one Input Context without changing any other active contexts.
Set Logic State: Enables, disables, or toggles one attached Logic on each target instance, firing lifecycle events only for real state transitions.
Set Menu Pause State: Changes only whether the named or top open UI menu pauses the world.
Set Position: Moves the target immediately to a world position, an Object-local offset, a named Coordinate, or a Transform bounding-box anchor.
Set Scale: Sets the Object instance’s live size multipliers.
Set Sprite: Changes the sprite resource.
Set UI Element Visibility: Shows or hides one UI Object.
Set UI Group Visibility: Shows or hides every UI Object with the same non-empty Group value.
Set Visible: Sets visible for the target or game.
Start Recurring Timer: Starts or restarts one saveable named recurring timer.
Stop Recurring Timer: Stops one named recurring timer.
Switch Mode: Sets the Event to One at a time and turns on only the selected Mode.
Trigger Custom Event: Broadcasts one named Custom Event to matching Custom Event listeners.
Trigger Custom Event on Object: Sends one named Custom Event to the selected Object instance without broadcasting it to unrelated Objects.
Tween: Moves one value toward a target over time: any Number, Vec or Color of a Component (self.transform.position, self.transform.opacity, a light’s color, a Data Structure field) or a Variable.
While: Runs its vertical child stack while its Condition stays true.

C.3 Reading Values From Tables

data('table', row, 'column'): the value in one cell: the row by its name or number, the column by its name.
dataRow('table', number): the name of the row at that number, counting from 0.
dataFind('table', 'column', value): the number of the first row whose column holds this value.
dataCount('table'): how many rows the table has.