diff options
Diffstat (limited to 'src/util/numeric.cpp')
| -rw-r--r-- | src/util/numeric.cpp | 114 |
1 files changed, 59 insertions, 55 deletions
diff --git a/src/util/numeric.cpp b/src/util/numeric.cpp index 6173515ee..19f927134 100644 --- a/src/util/numeric.cpp +++ b/src/util/numeric.cpp @@ -20,79 +20,84 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "numeric.h" #include "mathconstants.h" -#include "../log.h" +#include "log.h" #include "../constants.h" // BS, MAP_BLOCKSIZE #include <string.h> #include <iostream> +std::map<u16, std::vector<v3s16> > FacePositionCache::m_cache; // Calculate the borders of a "d-radius" cube -void getFacePositions(std::list<v3s16> &list, u16 d) +std::vector<v3s16> FacePositionCache::getFacePositions(u16 d) { - if(d == 0) - { - list.push_back(v3s16(0,0,0)); + 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) - { + if(d == 1) { /* This is an optimized sequence of coordinates. */ - list.push_back(v3s16( 0, 1, 0)); // top - list.push_back(v3s16( 0, 0, 1)); // back - list.push_back(v3s16(-1, 0, 0)); // left - list.push_back(v3s16( 1, 0, 0)); // right - list.push_back(v3s16( 0, 0,-1)); // front - list.push_back(v3s16( 0,-1, 0)); // bottom + 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 - list.push_back(v3s16(-1, 0, 1)); // back left - list.push_back(v3s16( 1, 0, 1)); // back right - list.push_back(v3s16(-1, 0,-1)); // front left - list.push_back(v3s16( 1, 0,-1)); // front right - list.push_back(v3s16(-1,-1, 0)); // bottom left - list.push_back(v3s16( 1,-1, 0)); // bottom right - list.push_back(v3s16( 0,-1, 1)); // bottom back - list.push_back(v3s16( 0,-1,-1)); // bottom front - list.push_back(v3s16(-1, 1, 0)); // top left - list.push_back(v3s16( 1, 1, 0)); // top right - list.push_back(v3s16( 0, 1, 1)); // top back - list.push_back(v3s16( 0, 1,-1)); // top front + 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 - list.push_back(v3s16(-1, 1, 1)); // top back-left - list.push_back(v3s16( 1, 1, 1)); // top back-right - list.push_back(v3s16(-1, 1,-1)); // top front-left - list.push_back(v3s16( 1, 1,-1)); // top front-right - list.push_back(v3s16(-1,-1, 1)); // bottom back-left - list.push_back(v3s16( 1,-1, 1)); // bottom back-right - list.push_back(v3s16(-1,-1,-1)); // bottom front-left - list.push_back(v3s16( 1,-1,-1)); // bottom front-right + 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++) - { + for(s16 y=0; y<=d-1; y++) { // Left and right side, including borders - for(s16 z=-d; z<=d; z++) - { - list.push_back(v3s16(d,y,z)); - list.push_back(v3s16(-d,y,z)); - if(y != 0) - { - list.push_back(v3s16(d,-y,z)); - list.push_back(v3s16(-d,-y,z)); + 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++) - { - list.push_back(v3s16(x,y,d)); - list.push_back(v3s16(x,y,-d)); - if(y != 0) - { - list.push_back(v3s16(x,-y,d)); - list.push_back(v3s16(x,-y,-d)); + 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)); } } } @@ -100,10 +105,9 @@ void getFacePositions(std::list<v3s16> &list, u16 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++) - { - list.push_back(v3s16(x,-d,z)); - list.push_back(v3s16(x,d,z)); + 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)); } } |