Mirrorlandia_minetest/minetest
1
0
Fork 1
mirror of https://github.com/minetest/minetest.git synced 2024-11-04 14:53:45 +01:00
Code Issues Packages Projects Releases Wiki Activity

Reuse seed when updating stars

Browse Source 
The only currently relevant parameter is scale which can now be changed
without resetting stars position
This commit is contained in:
numzero 2020-11-22 16:41:36 +03:00 committed by lhofhansl
parent 3077afc0a2
commit 560627eef8
2 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/client/sky.cpp
View File

@ -830,6 +830,7 @@ void Sky::setStarCount(u16 star_count, bool force_update)
// Allow force updating star count at game init.
if (m_star_params.count != star_count || force_update) {
m_star_params.count = star_count;
m_seed = (u64)myrand() << 32 | myrand();
updateStars();
}
}
@ -847,12 +848,13 @@ void Sky::updateStars() {
m_stars->Vertices.reallocate(4 * m_star_params.count);
m_stars->Indices.reallocate(6 * m_star_params.count);
PcgRandom rgen(m_seed);
float d = (0.006 / 2) * m_star_params.scale;
for (u16 i = 0; i < m_star_params.count; i++) {
v3f r = v3f(
myrand_range(-10000, 10000),
myrand_range(-10000, 10000),
myrand_range(-10000, 10000)
rgen.range(-10000, 10000),
rgen.range(-10000, 10000),
rgen.range(-10000, 10000)
);
core::CMatrix4<f32> a;
a.buildRotateFromTo(v3f(0, 1, 0), r);

1
src/client/sky.h
View File

@ -179,6 +179,7 @@ private:
bool m_default_tint = true;
u64 m_seed = 0;
irr_ptr<scene::SMeshBuffer> m_stars;
video::ITexture *m_sun_texture;