[***Mapgen fractal]
# Map generation attributes specific to Mapgen fractal.
-# 'julia' selects a julia set to be generated instead of a mandelbrot set.
+# 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.
mgfractal_spflags (Mapgen fractal flags) flags nojulia julia,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.
+mgfractal_formula (Mapgen fractal formula) int 1 1 4
+
# Mandelbrot set: Iterations of the recursive function.
# Controls scale of finest detail.
mgfractal_m_iterations (Mapgen fractal mandelbrot iterations) int 9
#### Mapgen fractal
# Map generation attributes specific to Mapgen fractal.
-# 'julia' selects a julia set to be generated instead of a mandelbrot set.
+# 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.
+# type: int
+# mgfractal_formula = 1
+
# Mandelbrot set: Iterations of the recursive function.
# Controls scale of finest detail.
# type: int
MapgenFractalParams *sp = (MapgenFractalParams *)params->sparams;
this->spflags = sp->spflags;
+ this->formula = sp->formula;
+
this->m_iterations = sp->m_iterations;
this->m_scale = sp->m_scale;
this->m_offset = sp->m_offset;
{
spflags = 0;
+ formula = 1;
+
m_iterations = 9; // Mandelbrot set only
m_scale = v3f(1024.0, 256.0, 1024.0);
m_offset = v3f(1.75, 0.0, 0.0);
{
settings->getFlagStrNoEx("mgfractal_spflags", spflags, flagdesc_mapgen_fractal);
+ settings->getU16NoEx("mgfractal_formula", formula);
+
settings->getU16NoEx("mgfractal_m_iterations", m_iterations);
settings->getV3FNoEx("mgfractal_m_scale", m_scale);
settings->getV3FNoEx("mgfractal_m_offset", m_offset);
{
settings->setFlagStr("mgfractal_spflags", spflags, flagdesc_mapgen_fractal, U32_MAX);
+ settings->setU16("mgfractal_formula", formula);
+
settings->setU16("mgfractal_m_iterations", m_iterations);
settings->setV3F("mgfractal_m_scale", m_scale);
settings->setV3F("mgfractal_m_offset", m_offset);
u16 iterations = spflags & MGFRACTAL_JULIA ? j_iterations : m_iterations;
for (u16 iter = 0; iter < iterations; iter++) {
- // 4D "Roundy" Mandelbrot set
- float nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
- float ny = 2.0f * (ox * oy + oz * ow) + cy;
- float nz = 2.0f * (ox * oz + oy * ow) + cz;
- float nw = 2.0f * (ox * ow + oy * oz) + cw;
+ float nx = 0.0f;
+ float ny = 0.0f;
+ float nz = 0.0f;
+ float nw = 0.0f;
+
+ if (formula == 1) { // 4D "Roundy" Mandelbrot 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
+ 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
+ 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
+ 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;
+ }
if (nx * nx + ny * ny + nz * nz + nw * nw > 4.0f)
return false;