Many computer languages contain commands that draw on the screen. Below are some articles about ploting points and lines on this (x, y) graph and some articles about drawing designs. Below this list of articles is some introductory material.
At EZ Programing Demos we will draw on the common (x, y) graph that one uses when studying Algebra. On our graph the x-axis runs from -10 to +10, and the y-axis goes from -10 to +10. That looks like this:
The type of coordinate system used here at EZ Programing Demos is much like the one you would see in a common math book. Coordinate systems like this are found in computer languages like LOGO and those at EZ Math Movie and Zona Land Education.
Usually, though, computer graphics use a bit more primitive of a system. The origin is often in the upper left corner of the graphing area with x-coordinates increasing from zero to the right, and y-coordinates starting with zero and getting greater in a downward direction. Often, however, a computer language will contain abilities that the programmer can use to transform the primitive coordinate system into one like we see here.
Suggested next article:
The following article is related to this demo: