In this chapter we will deal with 2D graphics. 2D graphics can be created in the following ways:
Drawing geometric primitives such as lines, circles, and other curves and shapes like triangles and rectangles. This is the most natural way of creating graphics by programming. Generative art and creative coding projects are often based on this graphics method. We will consider this in the rest of the chapter.
Drawing images lets you add more realism to the graphics, and this is considered in Chapter 4, Images and Textures.
Setting the contents of the screen directly, pixel-by-pixel, is the most powerful way of generating graphics. But it is harder to use for simple things like drawing curves. So, such method is normally used together with both of the previous methods. A somewhat fast technique for drawing a screen pixel-by-pixel consists of filling an array with pixels colors, loading it in an image, and drawing the image on the screen (see its description in the Creating...