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-rw-r--r--builtin/settingtypes.txt51
1 files changed, 31 insertions, 20 deletions
diff --git a/builtin/settingtypes.txt b/builtin/settingtypes.txt
index 4a714e1aa..62f817062 100644
--- a/builtin/settingtypes.txt
+++ b/builtin/settingtypes.txt
@@ -970,49 +970,60 @@ mgflat_np_cave2 (Mapgen flat cave2 noise parameters) noise_params 0, 12, (128, 1
[***Mapgen fractal]
-# 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.
-mgfractal_formula (Mapgen fractal formula) int 1 1 8
+# Choice of 18 fractals from 9 formulas.
+# 1 = 4D "Roundy" mandelbrot set.
+# 2 = 4D "Roundy" julia set.
+# 3 = 4D "Squarry" mandelbrot set.
+# 4 = 4D "Squarry" julia set.
+# 5 = 4D "Mandy Cousin" mandelbrot set.
+# 6 = 4D "Mandy Cousin" julia set.
+# 7 = 4D "Variation" mandelbrot set.
+# 8 = 4D "Variation" julia set.
+# 9 = 3D "Mandelbrot/Mandelbar" mandelbrot set.
+# 10 = 3D "Mandelbrot/Mandelbar" julia set.
+# 11 = 3D "Christmas Tree" mandelbrot set.
+# 12 = 3D "Christmas Tree" julia set.
+# 13 = 3D "Mandelbulb" mandelbrot set.
+# 14 = 3D "Mandelbulb" julia set.
+# 15 = 3D "Cosine Mandelbulb" mandelbrot set.
+# 16 = 3D "Cosine Mandelbulb" julia set.
+# 17 = 4D "Mandelbulb" mandelbrot set.
+# 18 = 4D "Mandelbulb" julia set.
+mgfractal_fractal (Mapgen fractal fractal) int 1 1 18
# Iterations of the recursive function.
-# Controls scale of finest detail.
+# Controls the amount of fine detail.
mgfractal_iterations (Mapgen fractal iterations) int 11
# Approximate (X,Y,Z) scale of fractal in nodes.
mgfractal_scale (Mapgen fractal scale) v3f (4096.0, 1024.0, 4096.0)
-# (X,Y,Z) offset of fractal from world centre.
+# (X,Y,Z) offset of fractal from world centre in units of 'scale'.
# 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).
+# The default is suitable for mandelbrot sets, it needs to be edited for julia sets.
# Range roughly -2 to 2. Multiply by 'scale' for offset in nodes.
mgfractal_offset (Mapgen fractal offset) v3f (1.79, 0.0, 0.0)
-# W co-ordinate of the generated 3D slice of the 4D shape.
-# Alters the generated 3D shape.
+# W co-ordinate of the generated 3D slice of a 4D fractal.
+# Determines which 3D slice of the 4D shape is generated.
+# Has no effect on 3D fractals.
# Range roughly -2 to 2.
mgfractal_slice_w (Mapgen fractal slice w) float 0.0
-# Julia set only: X value determining the 4D shape.
+# Julia set only: X component of hypercomplex constant determining julia shape.
# Range roughly -2 to 2.
mgfractal_julia_x (Mapgen fractal julia x) float 0.33
-# Julia set only: Y value determining the 4D shape.
+# Julia set only: Y component of hypercomplex constant determining julia shape.
# Range roughly -2 to 2.
mgfractal_julia_y (Mapgen fractal julia y) float 0.33
-# Julia set only: Z value determining the 4D shape.
+# Julia set only: Z component of hypercomplex constant determining julia shape.
# Range roughly -2 to 2.
mgfractal_julia_z (Mapgen fractal julia z) float 0.33
-# Julia set only: W value determining the 4D shape.
+# Julia set only: W component of hypercomplex constant determining julia shape.
+# Has no effect on 3D fractals.
# Range roughly -2 to 2.
mgfractal_julia_w (Mapgen fractal julia w) float 0.33