Code.org p5.play
Camera
A camera facilitates scrolling and zooming for scenes extending beyond the canvas. A camera has a position, a zoom factor, and the mouse coordinates relative to the view. The camera is automatically created on the first draw cycle.
In p5.js terms the camera wraps the whole drawing cycle in a transformation matrix but it can be disable anytime during the draw cycle for example to draw interface elements in an absolute position.
Constructor
Camera
-
x -
y -
zoom
Parameters:
-
xNumberInitial x coordinate
-
yNumberInitial y coordinate
-
zoomNumbermagnification
Methods
isActive
()
Boolean
Check to see if the camera is active. Use the methods Camera.on() and Camera.off() to enable or disable the camera.
Returns:
true if the camera is active
off
()
Deactivates the camera. The canvas will be drawn normally, ignoring the camera's position and scale until Camera.on() is called
on
()
Activates the camera. The canvas will be drawn according to the camera position and scale until Camera.off() is called
Properties
active
Boolean
True if the camera is active. Read only property. Use the methods Camera.on() and Camera.off() to enable or disable the camera.
mouseX
Number
MouseX translated to the camera view. Offsetting and scaling the canvas will not change the sprites' position nor the mouseX and mouseY variables. Use this property to read the mouse position if the camera moved or zoomed.
mouseY
Number
MouseY translated to the camera view. Offsetting and scaling the canvas will not change the sprites' position nor the mouseX and mouseY variables. Use this property to read the mouse position if the camera moved or zoomed.
x
Number
Camera x position. Defines the horizontal global offset of the sketch.
y
Number
Camera y position. Defines the horizontal global offset of the sketch.
zoom
Number
Camera zoom. Defines the global scale of the sketch. A scale of 1 will be the normal size. Setting it to 2 will make everything twice the size. .5 will make everything half size.