oss/luanti
oss/luanti
1
0
Fork 0
mirror of https://github.com/luanti-org/luanti.git synced 2025-06-27 16:36:03 +00:00
Code Wiki Activity

New map generator added (and SQLite, messed up the commits at that time...) (import from temporary git repo)

Browse source
This commit is contained in:
Perttu Ahola 2011-06-25 04:25:14 +03:00
parent 47e4eda4bb
commit 7538b4c620
29 changed files with 135053 additions and 2913 deletions
Download patch file Download diff file Expand all files Collapse all files

111
src/noise.cpp
View file

@ -222,6 +222,49 @@ double noise3d_perlin_abs(double x, double y, double z, int seed,
return a;
}
// -1->0, 0->1, 1->0
double contour(double v)
{
v = fabs(v);
if(v >= 1.0)
return 0.0;
return (1.0-v);
}
double noise3d_param(const NoiseParams &param, double x, double y, double z)
{
double s = param.pos_scale;
x /= s;
y /= s;
z /= s;
if(param.type == NOISE_PERLIN)
{
return param.noise_scale*noise3d_perlin(x,y,z, param.seed,
param.octaves,
param.persistence);
}
else if(param.type == NOISE_PERLIN_ABS)
{
return param.noise_scale*noise3d_perlin_abs(x,y,z, param.seed,
param.octaves,
param.persistence);
}
else if(param.type == NOISE_PERLIN_CONTOUR)
{
return contour(param.noise_scale*noise3d_perlin(x,y,z,
param.seed, param.octaves,
param.persistence));
}
else if(param.type == NOISE_PERLIN_CONTOUR_FLIP_YZ)
{
return contour(param.noise_scale*noise3d_perlin(x,z,y,
param.seed, param.octaves,
param.persistence));
}
else assert(0);
}
/*
NoiseBuffer
*/
@ -246,8 +289,7 @@ void NoiseBuffer::clear()
m_size_z = 0;
}
void NoiseBuffer::create(int seed, int octaves, double persistence,
double pos_scale,
void NoiseBuffer::create(const NoiseParams &param,
double first_x, double first_y, double first_z,
double last_x, double last_y, double last_z,
double samplelength_x, double samplelength_y, double samplelength_z)
@ -265,22 +307,54 @@ void NoiseBuffer::create(int seed, int octaves, double persistence,
m_size_y = (last_y - m_start_y)/samplelength_y + 2;
m_size_z = (last_z - m_start_z)/samplelength_z + 2;
/*dstream<<"m_size_x="<<m_size_x<<", m_size_y="<<m_size_y
<<", m_size_z="<<m_size_z<<std::endl;*/
m_data = new double[m_size_x*m_size_y*m_size_z];
for(int x=0; x<m_size_x; x++)
for(int y=0; y<m_size_y; y++)
for(int z=0; z<m_size_z; z++)
{
double xd = (m_start_x + (double)x*m_samplelength_x)/pos_scale;
double yd = (m_start_y + (double)y*m_samplelength_y)/pos_scale;
double zd = (m_start_z + (double)z*m_samplelength_z)/pos_scale;
intSet(x,y,z, noise3d_perlin(xd,yd,zd,seed,octaves,persistence));
double xd = (m_start_x + (double)x*m_samplelength_x);
double yd = (m_start_y + (double)y*m_samplelength_y);
double zd = (m_start_z + (double)z*m_samplelength_z);
double a = noise3d_param(param, xd,yd,zd);
intSet(x,y,z, a);
}
}
void NoiseBuffer::multiply(const NoiseParams &param)
{
assert(m_data != NULL);
for(int x=0; x<m_size_x; x++)
for(int y=0; y<m_size_y; y++)
for(int z=0; z<m_size_z; z++)
{
double xd = (m_start_x + (double)x*m_samplelength_x);
double yd = (m_start_y + (double)y*m_samplelength_y);
double zd = (m_start_z + (double)z*m_samplelength_z);
double a = noise3d_param(param, xd,yd,zd);
intMultiply(x,y,z, a);
}
}
// Deprecated
void NoiseBuffer::create(int seed, int octaves, double persistence,
bool abs,
double first_x, double first_y, double first_z,
double last_x, double last_y, double last_z,
double samplelength_x, double samplelength_y, double samplelength_z)
{
NoiseParams param;
param.type = abs ? NOISE_PERLIN_ABS : NOISE_PERLIN;
param.seed = seed;
param.octaves = octaves;
param.persistence = persistence;
create(param, first_x, first_y, first_z,
last_x, last_y, last_z,
samplelength_x, samplelength_y, samplelength_z);
}
void NoiseBuffer::intSet(int x, int y, int z, double d)
{
int i = m_size_x*m_size_y*z + m_size_x*y + x;
@ -289,6 +363,14 @@ void NoiseBuffer::intSet(int x, int y, int z, double d)
m_data[i] = d;
}
void NoiseBuffer::intMultiply(int x, int y, int z, double d)
{
int i = m_size_x*m_size_y*z + m_size_x*y + x;
assert(i >= 0);
assert(i < m_size_x*m_size_y*m_size_z);
m_data[i] = m_data[i] * d;
}
double NoiseBuffer::intGet(int x, int y, int z)
{
int i = m_size_x*m_size_y*z + m_size_x*y + x;
@ -326,3 +408,14 @@ double NoiseBuffer::get(double x, double y, double z)
return triLinearInterpolation(v000,v100,v010,v110,v001,v101,v011,v111,xl,yl,zl);
}
/*bool NoiseBuffer::contains(double x, double y, double z)
{
x -= m_start_x;
y -= m_start_y;
z -= m_start_z;
x /= m_samplelength_x;
y /= m_samplelength_y;
z /= m_samplelength_z;
if(x <= 0.0 || x >= m_size_x)
}*/