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Mgfractal: Move julia set selection into formula parameter

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Improve default parameters
Update and improve documentation
Unhide mapgen, but is still unstable
This commit is contained in:
paramat 2015-11-21 20:22:45 +00:00
parent a4e3ed0136
commit c24f3b0a65
5 changed files with 65 additions and 50 deletions
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25
src/mapgen_fractal.cpp
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@ -28,7 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "content_sao.h"
#include "nodedef.h"
#include "voxelalgorithms.h"
#include "profiler.h" // For TimeTaker
//#include "profiler.h" // For TimeTaker
#include "settings.h" // For g_settings
#include "emerge.h"
#include "dungeongen.h"
@ -41,7 +41,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
FlagDesc flagdesc_mapgen_fractal[] = {
{"julia", MGFRACTAL_JULIA},
{NULL, 0}
};
@ -143,9 +142,9 @@ MapgenFractalParams::MapgenFractalParams()
spflags = 0;
formula = 1;
iterations = 9;
scale = v3f(1024.0, 256.0, 1024.0);
offset = v3f(1.75, 0.0, 0.0);
iterations = 11;
scale = v3f(4096.0, 1024.0, 4096.0);
offset = v3f(1.79, 0.0, 0.0);
slice_w = 0.0;
julia_x = 0.33;
@ -236,7 +235,7 @@ void MapgenFractal::makeChunk(BlockMakeData *data)
this->generating = true;
this->vm = data->vmanip;
this->ndef = data->nodedef;
TimeTaker t("makeChunk");
//TimeTaker t("makeChunk");
v3s16 blockpos_min = data->blockpos_min;
v3s16 blockpos_max = data->blockpos_max;
@ -319,7 +318,7 @@ void MapgenFractal::makeChunk(BlockMakeData *data)
// Sprinkle some dust on top after everything else was generated
dustTopNodes();
printf("makeChunk: %dms\n", t.stop());
//printf("makeChunk: %dms\n", t.stop());
updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
@ -369,7 +368,7 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
{
float cx, cy, cz, cw, ox, oy, oz, ow;
if (spflags & MGFRACTAL_JULIA) { // Julia set
if (formula % 2 == 0) { // Julia sets, formula = 2, 4, 6, 8
cx = julia_x;
cy = julia_y;
cz = julia_z;
@ -378,7 +377,7 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
oy = (float)y / scale.Y - offset.Y;
oz = (float)z / scale.Z - offset.Z;
ow = slice_w;
} else { // Mandelbrot set
} else { // Mandelbrot sets, formula = 1, 3, 5, 7
cx = (float)x / scale.X - offset.X;
cy = (float)y / scale.Y - offset.Y;
cz = (float)z / scale.Z - offset.Z;
@ -395,22 +394,22 @@ bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
float nz = 0.0f;
float nw = 0.0f;
if (formula == 1) { // 4D "Roundy" Mandelbrot Set
if (formula == 1 || formula == 2) { // 4D "Roundy" Mandelbrot/Julia Set
nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz + oy * ow) + cz;
nw = 2.0f * (ox * ow + oy * oz) + cw;
} else if (formula == 2) { // 4D "Squarry" Mandelbrot Set
} else if (formula == 3 || formula == 4) { // 4D "Squarry" Mandelbrot/Julia Set
nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz + oy * ow) + cz;
nw = 2.0f * (ox * ow - oy * oz) + cw;
} else if (formula == 3) { // 4D "Mandy Cousin" Mandelbrot Set
} else if (formula == 5 || formula == 6) { // 4D "Mandy Cousin" Mandelbrot/Julia Set
nx = ox * ox - oy * oy - oz * oz + ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz + oy * ow) + cz;
nw = 2.0f * (ox * ow + oy * oz) + cw;
} else if (formula == 4) { // 4D Mandelbrot Set Variation
} else if (formula == 7 || formula == 8) { // 4D "Variation" Mandelbrot/Julia Set
nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz - oy * ow) + cz;