Thanks for all the suggestions on getting the latest version of the code. When I read there was some tool that help manage the source I guessed that it was not available on a Mac. I kept downloading things until I found a tar.gz file that decompressed into xfractint-20.04p9 so I think I now have the latest source. I don&#39;t care which platform it is for since I am only using it to figure out algorithms. Unfortunately, this code looks exactly the same in the area I am having a problem with.<div>
<br></div><div><div>I have been trying to figure out how outside=tdis works. The documentation is vague on outside=tdis and trying to guess the algorithm by comparing images has proven futile. I looked in detail at the code in calcfrac.c and this is what I see. It looks very simple. I pasted together the relevant parts so it is easy to see all together.</div>
<div><br></div><div>version xfractint-20.04p09 calcfrac.c line numbers</div><div><br></div><div>double totaldist = 0.0; // Line 1780</div><div><br></div><div>// Initialization</div><div>if (outside == TDIS) {  // Line 1892</div>
<div>   lastz.x = old.x;</div><div>   lastz.y = old.y;</div><div> }</div><div><br></div><div>// Main loop</div><div>if (outside == TDIS) // Line 2087</div><div>{</div><div>    totaldist += sqrt(sqr(lastz.x-new.x)+sqr(lastz.y-new.y));</div>
<div>    lastz.x = new.x;</div><div>    lastz.y = new.y;</div><div>}</div><div><br></div><div>// After main loop. Color methods</div><div>else if (outside == TDIS) { // Line 2328</div><div>     coloriter = (long)(totaldist);</div>
<div>}</div><div><br></div><div>I don&#39;t think I implemented anything wrong here. The image I get has a color index that changes much faster than the correct image. Its not off by a fixed number or a ratio or any other good clue as to what is wrong. I was hoping someone here might have an idea of something outside this code that could affect the results. If not, no worries, I will just keep looking.</div>
<div><br></div><div>Thanks again for the help. Maybe I will be able to return the favor sometime.</div><div><br></div>Mike Frazier<br><a href="http://www.fracton.org">www.fracton.org</a><br>
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