The BBC microcomputer provides high resolution graphics at a remarkably low cost, and the programs in this book arise from a desire to show off this machine's immensely powerful graphics capabilities.
Usually programs like these are consigned to a backroom inhabited by hairy programmers, only to be revealed to the public at exhibitions and demonstrations. Here a wealth of useful techniques are explored to provide some remarkably compact and potent programs. In most cases the program as printed is readily adaptable to produce new and interesting effects.
As listed all the programs will run directly on the Model B.
Programs can be run on the Model A simply by altering the mode statement at the start of the programs from MODE 1 to MODE 5. The price paid for this alteration will be some loss of resolution or a reduction in the number of colours used, but despite this the visual impact of most of the programs will hardly be affected. In the case of two programs (FIELD and ISLAND) further modifications are necessary, and these are listed in Appendix A at the back of the book.