Interface for a class corners
number
returns bottom position of canvas corner
returns the bottom center point of canvas corner
returns the bottom left point of canvas corner
returns the bottom right point of canvas corner
returns the center point of canvas corner
number
returns height of canvas
number
returns left position of canvas corner
returns the middle left point of canvas corner
returns the middle left point of canvas corner
number
returns right position of canvas corner
number
returns top position of canvas corner
returns the top center point of canvas corner
returns the top left point of canvas corner
returns the top right point of canvas corner
number
returns width of canvas