2006week5_4

# 2006week5_4 - Week 5 Fractals This exercise is about...

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Week 5 Fractals This exercise is about creating fractal images. Code to produce a simple fractal can be found on the unit web page. Compiling and executing this code will produce something like: .................................................. .................................................. .................................................. .................................................. .................................................. .......................... ### ..................... .................... ############### ............... .................... ################ .............. ................... ##################? ............ .................... ###################### ........ .................... ###################### ........ ................... ##################? ............ .................... ################ .............. .................... ############### ............... .......................... ### ..................... .................................................. .................................................. .................................................. .................................................. Experiment with different settings for STARTY and so on. You need to understand how main() works, although an in-depth understanding of what Converging() does is not necessary, other than it returns an integer in the range 0 ... MAX_ITERS . Extend the above program so that the constants STARTX ENDX STARTY , ENDY , are now vari- ables of type double, the values of which are read from a file using fscanf() . Store one value per line. Images A computer image, such as those seen on the Web, are stored in a particular format. Those on the Web are typically JPEG or GIF images, both of which are stored in a compressed format. Here we look at the PPM image format which is particularly simple. Each image is a collection of Red, Green, Blue values known as a pixel. Each pixel, therefore, consists of three unsigned char values. A red colour is formed by setting these values to
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