Title: Mag Post by: Adam Majewski on January 09, 2015, 05:25:17 PM Hi
First question : In Image Calculation Parameters there is : CENTER-MAG=[Xctr/Yctr/Mag[/Xmagfactor/Rotation/Skew]] where mag in case of type=mandel has initial value : mag = 6.66666667e-01 ? Why ? Why not 1 ( no zoom ) ? Second question : Can you find the source code where center-mag and corners are computed : * after zoom * after reading par file ? TIA Adam Title: Re: Mag Post by: Ryan D on January 11, 2015, 10:58:04 PM First question : In Image Calculation Parameters there is : CENTER-MAG=[Xctr/Yctr/Mag[/Xmagfactor/Rotation/Skew]] where mag in case of type=mandel has initial value : mag = 6.66666667e-01 ? Why ? Why not 1 ( no zoom ) ? If the magnification is set to 1, the range on the Y axis is +1 to -1 - this is zoomed in too much and cuts off some of the top & bottom bulbs on the Mandelbrot set. With magnification set to .666666667, the range on the Y axis is +1.5 to -1.5, which gives a view of the complete Mandelbrot set. Second question : Can you find the source code where center-mag and corners are computed : * after zoom * after reading par file ? After the fractal has been drawn, press the letter "z" - this brings up a screen showing the parameter values and the fractal formula. Then press F6 - this brings up the centre of the screen and the magnification amount. Then press F7 - this converts the center-mag numbers to the corners of the screen. Pressing F7 again takes you back to the center-mag values. Ryan Title: Re: Mag Post by: Adam Majewski on January 13, 2015, 05:26:50 PM Thx for the answer. See wikibooks (https://en.wikibooks.org/wiki/Fractals/fractint#Image_Calculation_Parameters)( you are wellcome to edit ) |