Input

In Pine, input handling is done by input systems.

Keyboard

Keyboard keys are represented as values of the Key, which maps keys to GLFW keyboard key tokens.

// Returns true in every frame while the space key is being pressed
boolean spacePressed = input.getKey(Key.SPACE);

// Returns true in the first frame the space key is down
boolean spaceDown = input.getKeyDown(Key.SPACE);

// Returns true in every frame while both the left control and space keys are being pressed
boolean controlSpacePressed = input.getKeys(Key.L_CONTROL, Key.SPACE)

// Returns true in every frame while either the left or right control keys are being pressed
boolean controlPressed = input.getAnyKey(Key.L_CONTROL, Key.R_CONTROL)

Stopping propagation

To prevent later systems from reading the same keyboard input, use the following methods:

boolean spacePressed = input.getKey(Key.SPACE, true);
boolean spaceDown = input.getKeyDown(Key.SPACE, true);

Using GLFW keyboard key tokens

Instead of using the Key enum, you can also use GLFW keyboard key tokens directly.

import static org.lwjgl.glfw.GLFW.*;

boolean spacePressed = input.getKey(GLFW_KEY_SPACE);

Mouse

Cursor position

The position of the cursor can be retrieved using the following methods. These methods will return null if the cursor was already blocked by an entity.

// Returns the screen coordinates of the cursor
Vector2i cursorPosition = input.getCursor();

// Returns the position of the cursor transformed to a global world position, relative to the camera
Vector2f cursorWorldPosition = input.getWorldCursor();

Blocking

The cursor can be blocked by an entity to prevent later systems from reading the cursor position. This is only possible if the entity is currently active.

// Block the cursor using an entity, if it hasn't been blocked yet
input.blockCursor(entity);

// Block the cursor using an entity, regardless of whether it has already been blocked yet
input.blockCursor(entity, true);

// Returns true if the cursor has been blocked by an entity
boolean isCursorBlocked = input.isCursorBlocked();

// Returns the entity that is blocking the cursor, or null if there isn't one
Entity cursorBlocker = input.getCursorBlocker();

Buttons

Mouse buttons are represented as values of the MouseButton, which maps buttons to GLFW mouse buttons.

// Returns true in every frame while the left mouse button is being pressed
boolean leftMouseButtonPressed = input.getMouseButton(MouseButton.LEFT);

// Returns true in the first frame the left mouse button is down
boolean leftMouseButtonDown = input.getMouseButton(MouseButton.LEFT);

Stopping propagation

To prevent later systems from reading the same mouse button input, use the following methods:

boolean leftMouseButtonPressed = input.getMouseButton(MouseButton.LEFT, true);
boolean leftMouseButtonDown = input.getMouseButton(MouseButton.LEFT, true);

Using GLFW mouse buttons

Instead of using the MouseButton enum, you can also use GLFW mouse buttons directly.

import static org.lwjgl.glfw.GLFW.*;

boolean leftMouseButtonPressed = input.getMouseButton(GLFW_MOUSE_BUTTON_1);

Scroll

Horizontal and vertical scroll values can be read using the following methods.

float scrollX = input.getScrollX();
float scrollY = input.getScrollY();

Cursor type and image

The appearance of the cursor can be changed using the following methods. Cursors can either have a standard appearance (cursor type) or a custom appearace (cursor image).

// Show the default hand (or pointer) cursor
input.setCursorType(CursorType.HAND);
// Or
import static org.lwjgl.glfw.GLFW.*;
input.setCursorType(GLFW_ARROW_CURSOR);

// Show a custom cursor image
Image cursorImage = ResourcePool.loadImage("textures/cursor.png");
input.setCursorImage(cursorImage);

// Show a custom cursor image with an offset of 16x16 pixels
input.setCursorImage(cursorImage, 16, 16);
input.setCursorImage(cursorImage, new Vector2i(16, 16));