Hydra

Listening in Hydra

Hydra handles most listening through a simple hydra.listen API. For continuous checks, add a “ticker” to run every single frame:

// Provides a beta deltaTime to ensure FPS changes
var ticker = lib.listen.addTicker((deltaTime) => {
    // Run checks here
})

You can then remove tickers if needed:

lib.listen.removeTicker(ticker)

Mouse position

lib.listen.mouse.x
lib.listen.mouse.y

Mouse presses

Use the simple isMouseDown api or use the key press api for Mouse1:

lib.listen.isMouseDown() // Only left click

lib.listen.isKey("Mouse1") // Left click
lib.listen.isKey("Mouse2") // Right click

Key presses

For a simple check if a key is down:

lib.listen.isKey("a") // A
lib.listen.isKey("A") // Shift + A

// Check if multiple are down
lib.listen.isManyKeys("a", "b") // A and B

Initial key press

Checking when a key is first pressed is also easy:

lib.listen.onKeyDown("a") // True on the first frame "a" is pressed on

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