Mgfractal: Move julia set selection into formula parameter

Improve default parameters
Update and improve documentation
Unhide mapgen, but is still unstable

1 files changed, 32 insertions, 17 deletions

diff --git a/minetest.conf.example b/minetest.conf.example
index d8534a0f5..37d622d3d 100644
--- a/minetest.conf.example
+++ b/minetest.conf.example
@@ -1234,44 +1234,59 @@
 
 #### Mapgen fractal
 
-#    Map generation attributes specific to Mapgen fractal.
-#    The 'julia' flag results in the corresponding julia set being generated.
-#    Flags that are not specified in the flag string are not modified from the default.
-#    Flags starting with "no" are used to explicitly disable them.
-#    type: flags possible values: julia, nojulia
-# mgfractal_spflags = nojulia
-
-#    Choice of 4 mandelbrot set variations.
-#    1 = 4D "Roundy" mandelbrot set, 2 = 4D "Squarry" mandelbrot set,
-#    3 = 4D "Mandy Cousin" mandelbrot set, 4 = 4D mandelbrot set variation.
+#    Choice of 8 4-dimensional fractals.
+#    1 = "Roundy" mandelbrot set.
+#    2 = "Roundy" julia set.
+#    3 = "Squarry" mandelbrot set.
+#    4 = "Squarry" julia set.
+#    5 = "Mandy Cousin" mandelbrot set.
+#    6 = "Mandy Cousin" julia set.
+#    7 = "Variation" mandelbrot set.
+#    8 = "Variation" julia set.
 #    type: int
 # mgfractal_formula = 1
 
 #    Iterations of the recursive function.
 #    Controls scale of finest detail.
 #    type: int
-# mgfractal_iterations = 9
+# mgfractal_iterations = 11
 
-#    Approximate (X,Y,Z) scales in nodes.
+#    Approximate (X,Y,Z) scale of fractal in nodes.
 #    type: v3f
-# mgfractal_scale = (1024.0, 256.0, 1024.0)
+# mgfractal_scale = (4096.0, 1024.0, 4096.0)
 
-#    (X,Y,Z) offsets from world centre.
-#    Range roughly -2 to 2, multiply by 'scale' for offsets in nodes.
+#    (X,Y,Z) offset of fractal from world centre.
+#    Used to move a suitable spawn area of low land close to (0, 0).
+#    The default is suitable for mandelbrot sets, it needs to be edited for julia sets,
+#    do this by greatly reducing 'scale' and setting 'offset' initially to (0, 0, 0).
+#    Range roughly -2 to 2. Multiply by 'scale' for offset in nodes.
 #    type: v3f
-# mgfractal_offset = (1.75, 0.0, 0.0)
+# mgfractal_offset = (1.79, 0.0, 0.0)
 
 #    W co-ordinate of the generated 3D slice of the 4D shape.
+#    Alters the generated 3D shape.
 #    Range roughly -2 to 2.
 #    type: float
 # mgfractal_slice_w = 0.0
 
-#    Julia set only: 4 values determining the 4D shape.
+#    Julia set only: X value determining the 4D shape.
 #    Range roughly -2 to 2.
 #    type: float
 # mgfractal_julia_x = 0.33
+
+#    Julia set only: Y value determining the 4D shape.
+#    Range roughly -2 to 2.
+#    type: float
 # mgfractal_julia_y = 0.33
+
+#    Julia set only: Z value determining the 4D shape.
+#    Range roughly -2 to 2.
+#    type: float
 # mgfractal_julia_z = 0.33
+
+#    Julia set only: W value determining the 4D shape.
+#    Range roughly -2 to 2.
+#    type: float
 # mgfractal_julia_w = 0.33
 
 #    type: noise_params