forked from Mirrorlandia_minetest/minetest
Mgfractal: Move julia set selection into formula parameter
Improve default parameters Update and improve documentation Unhide mapgen, but is still unstable
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paramat
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@ -970,29 +970,33 @@ mgflat_np_cave2 (Mapgen flat cave2 noise parameters) noise_params 0, 12, (128, 1
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[***Mapgen fractal]
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# Map generation attributes specific to Mapgen fractal.
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# The 'julia' flag results in the corresponding julia set being generated.
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# Flags that are not specified in the flag string are not modified from the default.
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# Flags starting with "no" are used to explicitly disable them.
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mgfractal_spflags (Mapgen fractal flags) flags nojulia julia,nojulia
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# Choice of 4 mandelbrot set variations.
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# 1 = 4D "Roundy" mandelbrot set, 2 = 4D "Squarry" mandelbrot set,
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# 3 = 4D "Mandy Cousin" mandelbrot set, 4 = 4D mandelbrot set variation.
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mgfractal_formula (Mapgen fractal formula) int 1 1 4
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# Choice of 8 4-dimensional fractals.
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# 1 = "Roundy" mandelbrot set.
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# 2 = "Roundy" julia set.
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# 3 = "Squarry" mandelbrot set.
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# 4 = "Squarry" julia set.
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# 5 = "Mandy Cousin" mandelbrot set.
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# 6 = "Mandy Cousin" julia set.
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# 7 = "Variation" mandelbrot set.
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# 8 = "Variation" julia set.
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mgfractal_formula (Mapgen fractal formula) int 1 1 8
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# Iterations of the recursive function.
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# Controls scale of finest detail.
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mgfractal_iterations (Mapgen fractal iterations) int 9
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mgfractal_iterations (Mapgen fractal iterations) int 11
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# Approximate (X,Y,Z) scales in nodes.
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mgfractal_scale (Mapgen fractal scale) v3f (1024.0, 256.0, 1024.0)
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# Approximate (X,Y,Z) scale of fractal in nodes.
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mgfractal_scale (Mapgen fractal scale) v3f (4096.0, 1024.0, 4096.0)
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# (X,Y,Z) offsets from world centre.
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# Range roughly -2 to 2, multiply by 'scale' for offsets in nodes.
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mgfractal_offset (Mapgen fractal offset) v3f (1.75, 0.0, 0.0)
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# (X,Y,Z) offset of fractal from world centre.
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# Used to move a suitable spawn area of low land close to (0, 0).
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# The default is suitable for mandelbrot sets, it needs to be edited for julia sets,
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# do this by greatly reducing 'scale' and setting 'offset' initially to (0, 0, 0).
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# Range roughly -2 to 2. Multiply by 'scale' for offset in nodes.
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mgfractal_offset (Mapgen fractal offset) v3f (1.79, 0.0, 0.0)
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# W co-ordinate of the generated 3D slice of the 4D shape.
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# Alters the generated 3D shape.
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# Range roughly -2 to 2.
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mgfractal_slice_w (Mapgen fractal slice w) float 0.0
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@ -1234,44 +1234,59 @@
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#### Mapgen fractal
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# Map generation attributes specific to Mapgen fractal.
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# The 'julia' flag results in the corresponding julia set being generated.
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# Flags that are not specified in the flag string are not modified from the default.
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# Flags starting with "no" are used to explicitly disable them.
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# type: flags possible values: julia, nojulia
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# mgfractal_spflags = nojulia
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# Choice of 4 mandelbrot set variations.
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# 1 = 4D "Roundy" mandelbrot set, 2 = 4D "Squarry" mandelbrot set,
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# 3 = 4D "Mandy Cousin" mandelbrot set, 4 = 4D mandelbrot set variation.
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# Choice of 8 4-dimensional fractals.
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# 1 = "Roundy" mandelbrot set.
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# 2 = "Roundy" julia set.
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# 3 = "Squarry" mandelbrot set.
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# 4 = "Squarry" julia set.
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# 5 = "Mandy Cousin" mandelbrot set.
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# 6 = "Mandy Cousin" julia set.
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# 7 = "Variation" mandelbrot set.
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# 8 = "Variation" julia set.
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# type: int
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# mgfractal_formula = 1
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# Iterations of the recursive function.
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# Controls scale of finest detail.
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# type: int
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# mgfractal_iterations = 9
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# mgfractal_iterations = 11
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# Approximate (X,Y,Z) scales in nodes.
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# Approximate (X,Y,Z) scale of fractal in nodes.
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# type: v3f
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# mgfractal_scale = (1024.0, 256.0, 1024.0)
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# mgfractal_scale = (4096.0, 1024.0, 4096.0)
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# (X,Y,Z) offsets from world centre.
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# Range roughly -2 to 2, multiply by 'scale' for offsets in nodes.
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# (X,Y,Z) offset of fractal from world centre.
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# Used to move a suitable spawn area of low land close to (0, 0).
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# The default is suitable for mandelbrot sets, it needs to be edited for julia sets,
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# do this by greatly reducing 'scale' and setting 'offset' initially to (0, 0, 0).
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# Range roughly -2 to 2. Multiply by 'scale' for offset in nodes.
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# type: v3f
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# mgfractal_offset = (1.75, 0.0, 0.0)
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# mgfractal_offset = (1.79, 0.0, 0.0)
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# W co-ordinate of the generated 3D slice of the 4D shape.
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# Alters the generated 3D shape.
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# Range roughly -2 to 2.
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# type: float
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# mgfractal_slice_w = 0.0
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# Julia set only: 4 values determining the 4D shape.
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# Julia set only: X value determining the 4D shape.
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# Range roughly -2 to 2.
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# type: float
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# mgfractal_julia_x = 0.33
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# Julia set only: Y value determining the 4D shape.
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# Range roughly -2 to 2.
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# type: float
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# mgfractal_julia_y = 0.33
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# Julia set only: Z value determining the 4D shape.
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# Range roughly -2 to 2.
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# type: float
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# mgfractal_julia_z = 0.33
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# Julia set only: W value determining the 4D shape.
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# Range roughly -2 to 2.
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# type: float
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# mgfractal_julia_w = 0.33
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# type: noise_params
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@ -107,7 +107,7 @@ MapgenDesc g_reg_mapgens[] = {
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{"v6", new MapgenFactoryV6, true},
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{"v7", new MapgenFactoryV7, true},
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{"flat", new MapgenFactoryFlat, false},
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{"fractal", new MapgenFactoryFractal, false},
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{"fractal", new MapgenFactoryFractal, true},
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{"singlenode", new MapgenFactorySinglenode, false},
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};
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@ -28,7 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "content_sao.h"
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#include "nodedef.h"
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#include "voxelalgorithms.h"
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#include "profiler.h" // For TimeTaker
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//#include "profiler.h" // For TimeTaker
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#include "settings.h" // For g_settings
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#include "emerge.h"
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#include "dungeongen.h"
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@ -41,7 +41,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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FlagDesc flagdesc_mapgen_fractal[] = {
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{"julia", MGFRACTAL_JULIA},
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{NULL, 0}
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};
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@ -143,9 +142,9 @@ MapgenFractalParams::MapgenFractalParams()
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spflags = 0;
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formula = 1;
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iterations = 9;
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scale = v3f(1024.0, 256.0, 1024.0);
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offset = v3f(1.75, 0.0, 0.0);
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iterations = 11;
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scale = v3f(4096.0, 1024.0, 4096.0);
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offset = v3f(1.79, 0.0, 0.0);
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slice_w = 0.0;
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julia_x = 0.33;
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@ -236,7 +235,7 @@ void MapgenFractal::makeChunk(BlockMakeData *data)
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this->generating = true;
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this->vm = data->vmanip;
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this->ndef = data->nodedef;
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TimeTaker t("makeChunk");
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//TimeTaker t("makeChunk");
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v3s16 blockpos_min = data->blockpos_min;
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v3s16 blockpos_max = data->blockpos_max;
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@ -319,7 +318,7 @@ void MapgenFractal::makeChunk(BlockMakeData *data)
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// Sprinkle some dust on top after everything else was generated
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dustTopNodes();
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printf("makeChunk: %dms\n", t.stop());
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//printf("makeChunk: %dms\n", t.stop());
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updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
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@ -369,7 +368,7 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
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{
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float cx, cy, cz, cw, ox, oy, oz, ow;
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if (spflags & MGFRACTAL_JULIA) { // Julia set
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if (formula % 2 == 0) { // Julia sets, formula = 2, 4, 6, 8
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cx = julia_x;
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cy = julia_y;
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cz = julia_z;
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@ -378,7 +377,7 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
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oy = (float)y / scale.Y - offset.Y;
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oz = (float)z / scale.Z - offset.Z;
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ow = slice_w;
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} else { // Mandelbrot set
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} else { // Mandelbrot sets, formula = 1, 3, 5, 7
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cx = (float)x / scale.X - offset.X;
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cy = (float)y / scale.Y - offset.Y;
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cz = (float)z / scale.Z - offset.Z;
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@ -395,22 +394,22 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
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float nz = 0.0f;
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float nw = 0.0f;
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if (formula == 1) { // 4D "Roundy" Mandelbrot Set
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if (formula == 1 || formula == 2) { // 4D "Roundy" Mandelbrot/Julia Set
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nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
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ny = 2.0f * (ox * oy + oz * ow) + cy;
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nz = 2.0f * (ox * oz + oy * ow) + cz;
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nw = 2.0f * (ox * ow + oy * oz) + cw;
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} else if (formula == 2) { // 4D "Squarry" Mandelbrot Set
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} else if (formula == 3 || formula == 4) { // 4D "Squarry" Mandelbrot/Julia Set
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nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
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ny = 2.0f * (ox * oy + oz * ow) + cy;
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nz = 2.0f * (ox * oz + oy * ow) + cz;
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nw = 2.0f * (ox * ow - oy * oz) + cw;
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} else if (formula == 3) { // 4D "Mandy Cousin" Mandelbrot Set
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} else if (formula == 5 || formula == 6) { // 4D "Mandy Cousin" Mandelbrot/Julia Set
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nx = ox * ox - oy * oy - oz * oz + ow * ow + cx;
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ny = 2.0f * (ox * oy + oz * ow) + cy;
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nz = 2.0f * (ox * oz + oy * ow) + cz;
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nw = 2.0f * (ox * ow + oy * oz) + cw;
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} else if (formula == 4) { // 4D Mandelbrot Set Variation
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} else if (formula == 7 || formula == 8) { // 4D "Variation" Mandelbrot/Julia Set
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nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
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ny = 2.0f * (ox * oy + oz * ow) + cy;
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nz = 2.0f * (ox * oz - oy * ow) + cz;
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@ -25,9 +25,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#define MGFRACTAL_LARGE_CAVE_DEPTH -33
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/////////////////// Mapgen Fractal flags
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#define MGFRACTAL_JULIA 0x01
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class BiomeManager;
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extern FlagDesc flagdesc_mapgen_fractal[];
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