Waves



              Timothy Closs with a Spectrum

              program to make you sea-sick.



How many times have you wanted to show off your new

computer but have had nothing more to boast than a load of

boring arcade games? Well now you can impress everyone with

a stunning graphics display using Waves.

  Waves allows a "net" pattern - see examples - to be

transformed into another net pattern in a smooth, nine

frame animation sequence. It is easy to use, but results

can be stunning. When Run, Waves will display the message:

        Press 'L' to Load frames

              Any other key to continue

  If you wish to load some frames from tape, press L and

enter the name of the file to be loaded - otherwise press

any other key. [You can use this to see the example which

was depicted with the article - it's on the TZX after the

program, and is called "seasick".]

  A cross will then be displayed on the screen. The lower

edge of your first pattern must now be drawn - see

controls. When your edge is finished the cursor will move

up into the top right hand box and your second edge must be

drawn.

  The screen will then be cleared and the same process must

be repeated for the edges of your second pattern. The main

controls are:

    5 cursor down at a 45 degree angle

    6 cursor down at a 22.5 degree angle

    7 cursor up at a 22.5 degree angle

    8 cursor up at a 45 degree angle

    9 cursor across in a straight line

  In addition to these basic controls, however, a sine wave

can be drawn by pressing 1.

  Also, pressing 0 will copy the edge from the bottom left

box into the top right box.

  Now that all the edges have been entered, Waves will come

up with the question "South to North?". Pressing Y will

mean that your net patterns will have lines drawn from the

bottom edge to the top edge.

  If you reply Y to the following question, "West to

East?", your patterns will have 10 intermediate lines drawn

from the left of the screen to the right. If you reply Y to

both questions you will have criss-cross net patterns.

  You can escape from the graphical display by pressing E.

The program will then print the message:

        Press 'S' to Save frames

              'R' to Restart program

              'A' to see Animation