EZ Programing Demos

Slow motion, step by step, animated demonstrations of basic computer programing techniques

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About points and lines....

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:

Graph bounds

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.

 

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At EZ Math Movie

EZ Math Movie is a site that can help you experiment with and understand many topics in mathematics. Its main feature is an interactive animated (x, y) graph that you control with an actual programing language. There are many examples and tutorials, and EZ Math Movie is crossed referenced with both EZ Programing Demos and Zona Land Education.

 

Zona Land Education is a site with explanations and interactive diagrams covering many topics in physics and mathematics. Zona Land Education is cross referenced with EZ Math Movie, and it contains several animations that use EZ Math Movie's programing language.