diff options
Diffstat (limited to 'src/util/numeric.cpp')
| -rw-r--r-- | src/util/numeric.cpp | 93 |
1 files changed, 1 insertions, 92 deletions
diff --git a/src/util/numeric.cpp b/src/util/numeric.cpp index 87f1040ea..e6a9cb75e 100644 --- a/src/util/numeric.cpp +++ b/src/util/numeric.cpp @@ -24,100 +24,9 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "../noise.h" // PseudoRandom, PcgRandom #include "../threading/mutex_auto_lock.h" #include <string.h> -#include <iostream> -UNORDERED_MAP<u16, std::vector<v3s16> > FacePositionCache::m_cache; -Mutex FacePositionCache::m_cache_mutex; -// Calculate the borders of a "d-radius" cube -// TODO: Make it work without mutex and data races, probably thread-local -std::vector<v3s16> FacePositionCache::getFacePositions(u16 d) -{ - MutexAutoLock cachelock(m_cache_mutex); - if (m_cache.find(d) != m_cache.end()) - return m_cache[d]; - - generateFacePosition(d); - return m_cache[d]; - -} - -void FacePositionCache::generateFacePosition(u16 d) -{ - m_cache[d] = std::vector<v3s16>(); - if(d == 0) { - m_cache[d].push_back(v3s16(0,0,0)); - return; - } - if(d == 1) { - /* - This is an optimized sequence of coordinates. - */ - m_cache[d].push_back(v3s16( 0, 1, 0)); // top - m_cache[d].push_back(v3s16( 0, 0, 1)); // back - m_cache[d].push_back(v3s16(-1, 0, 0)); // left - m_cache[d].push_back(v3s16( 1, 0, 0)); // right - m_cache[d].push_back(v3s16( 0, 0,-1)); // front - m_cache[d].push_back(v3s16( 0,-1, 0)); // bottom - // 6 - m_cache[d].push_back(v3s16(-1, 0, 1)); // back left - m_cache[d].push_back(v3s16( 1, 0, 1)); // back right - m_cache[d].push_back(v3s16(-1, 0,-1)); // front left - m_cache[d].push_back(v3s16( 1, 0,-1)); // front right - m_cache[d].push_back(v3s16(-1,-1, 0)); // bottom left - m_cache[d].push_back(v3s16( 1,-1, 0)); // bottom right - m_cache[d].push_back(v3s16( 0,-1, 1)); // bottom back - m_cache[d].push_back(v3s16( 0,-1,-1)); // bottom front - m_cache[d].push_back(v3s16(-1, 1, 0)); // top left - m_cache[d].push_back(v3s16( 1, 1, 0)); // top right - m_cache[d].push_back(v3s16( 0, 1, 1)); // top back - m_cache[d].push_back(v3s16( 0, 1,-1)); // top front - // 18 - m_cache[d].push_back(v3s16(-1, 1, 1)); // top back-left - m_cache[d].push_back(v3s16( 1, 1, 1)); // top back-right - m_cache[d].push_back(v3s16(-1, 1,-1)); // top front-left - m_cache[d].push_back(v3s16( 1, 1,-1)); // top front-right - m_cache[d].push_back(v3s16(-1,-1, 1)); // bottom back-left - m_cache[d].push_back(v3s16( 1,-1, 1)); // bottom back-right - m_cache[d].push_back(v3s16(-1,-1,-1)); // bottom front-left - m_cache[d].push_back(v3s16( 1,-1,-1)); // bottom front-right - // 26 - return; - } - // Take blocks in all sides, starting from y=0 and going +-y - for(s16 y=0; y<=d-1; y++) { - // Left and right side, including borders - for(s16 z=-d; z<=d; z++) { - m_cache[d].push_back(v3s16(d,y,z)); - m_cache[d].push_back(v3s16(-d,y,z)); - if(y != 0) { - m_cache[d].push_back(v3s16(d,-y,z)); - m_cache[d].push_back(v3s16(-d,-y,z)); - } - } - // Back and front side, excluding borders - for(s16 x=-d+1; x<=d-1; x++) { - m_cache[d].push_back(v3s16(x,y,d)); - m_cache[d].push_back(v3s16(x,y,-d)); - if(y != 0) { - m_cache[d].push_back(v3s16(x,-y,d)); - m_cache[d].push_back(v3s16(x,-y,-d)); - } - } - } - - // Take the bottom and top face with borders - // -d<x<d, y=+-d, -d<z<d - for(s16 x=-d; x<=d; x++) - for(s16 z=-d; z<=d; z++) { - m_cache[d].push_back(v3s16(x,-d,z)); - m_cache[d].push_back(v3s16(x,d,z)); - } -} - -/* - myrand -*/ +// myrand PcgRandom g_pcgrand; |