Dakusan's Domain Forum

Main Site Discussion => Updates => Topic started by: Dakusan on October 22, 2009, 11:40:49 am

Title: Julia Fractal v0.51 and Pixel Shader Version
Post by: Dakusan on October 22, 2009, 11:40:49 am

Original update for Julia Fractal v0.51 and Pixel Shader Version can be found at https://www.castledragmire.com/Updates/Julia_Fractal_v0.51_and_Pixel_Shader_Version.
Originally posted on: 10/22/09
Regarding: Julia Fractals

v0.51: Binary | Source

Project Updates:

• Optimizations:
  • Changed lots of signed numbers to unsigned for theoretical better resolution in the long run.
  • In the coloring algorithm, “Bailout Radius”, and “Power” are constants, so I removed (commented out) their variables and turned anything that used them (i.e. floating point functions) into constants. This removed a lot of unnecessary floating point calculations for each pixel.
  • Added some precalculations into the fractal drawing section to speed up pixel calculations.
• Fixes:
  • The coordinates of the moused over pixel were being improperly calculated because I had forgotten the window was being drawn and calculated in a bottom to top fashion (Y=0 is at the bottom).

New Pixel Shader Implementation:

I have made a new sub project, available in the binary and source downloads, that might be eventually integrated into the main project. This proof of concept renders 100% of the fractal for each frame on the GPU. It is much faster and much smoother :-). See the Content Section for more information.