The height of the canvas.
The grid size.
The canvas rectangle.
The X coordinate of the scene rectangle within the larger canvas.
The Y coordinate of the scene rectangle within the larger canvas.
The width of the scene.
The height of the scene.
The scene rectangle.
The number of distance units in a single grid space.
The aspect ratio of the scene rectangle.
The length of the longest line that can be drawn on the canvas.
The width of the canvas.