Title: Not so impressive video..but why so few colors? Post by: mrrgu on January 08, 2010, 01:39:57 AM Hello
I did this rendering through the Mandelbulb, slice by slice 600 iterations per slice and displaying result every 10th iteration. Displayed the result with colors r g b mapping directly to (x, y, z) from the iterations. Question is why so few colors and no blue?? Do this mean the vectors are escaping only in certain directions ? Flickering at least I can explain that is orbits that do not settle. Video is kind of slow..so you should move forward.. http://www.youtube.com/user/mrrgu#p/a/u/0/W01jyg3sBTc (http://www.youtube.com/user/mrrgu#p/a/u/0/W01jyg3sBTc) Title: Re: Not so impressive video..but why so few colors? Post by: mrrgu on January 08, 2010, 07:24:38 PM Can no one explain this ?
Title: Re: Not so impressive video..but why so few colors? Post by: gaston3d on January 08, 2010, 09:43:19 PM Displayed the result with colors r g b mapping directly to (x, y, z) from the iterations. Question is why so few colors and no blue?? assuming you get last iteration point for color mapping, try: (r,g,b) = (kx*abs(x), ky*abs(y), kz*abs(z)), where k ~0.1 ~0.01 ? maybe some shift? abs for situation if z values are always negative. i don't know if it's possible, but thats probably yields no blue. Title: Re: Not so impressive video..but why so few colors? Post by: Buddhi on January 08, 2010, 09:57:12 PM I made the same experiment but I have completely another result. Please look at attached picture. There are all 3 colours (R=x, G=y, B = z), also blue. Colours are smooth - it means that vectors are escaping in every direction (not quantised). I think you have some bug in program and colours are clipped.
Title: Re: Not so impressive video..but why so few colors? Post by: bib on January 08, 2010, 10:14:40 PM Nice picture Buddhi :)
Title: Re: Not so impressive video..but why so few colors? Post by: mrrgu on January 09, 2010, 12:45:21 AM Ok sorry!! My mistake had alpha blending turned on! it made the colors dissapear! Now it kind of matches Buddi but in lower resolution. (http://img96.imageshack.us/img96/9282/sliceme.png) To the right is (theta,phi,z) for debugging.. note temperature outside to the top right..must keep Computer working to get a good temperature in the apartment..bad insulation :) |