When drawing graphics to a window or image, you need to understand the coordinate system of the area you’re drawing to. For example, when you use the Render Scene to Window node to display a 3D scene in a window, typically the point in your 3D scene with coordinates (0,0,0) will be drawn at the center of the window. (If you’re not familiar with the concept of 2D and 3D coordinates, see https://simple.wikipedia.org/wiki/Cartesian_coordinate_system and other references to learn more.)
All of the built-in nodes that work with graphics use Vuo Coordinates:
Typically, as illustrated above, the position (0,0) for 2D graphics or (0,0,0) for 3D graphics is at the center of the rendering area. The X-coordinate -1 is along the left edge of the rendering area, and the X-coordinate 1 is along the right edge. The rendering area’s height depends on the aspect ratio of the graphics being rendered, with the Y-coordinate increasing from bottom to top. In 3D graphics, the Z-coordinate increases from back to front.
When working with 3D graphics, you can change the center and bounds of the rendering area by using a Make Perspective Camera or Make Orthogonal Camera node. For example, you can use a camera to zoom out, so that the rendering area shows a larger range of X- and Y-coordinates.