source/partcache.cpp

   1 #include "part.h"
   2 #include "partcache.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GLtk {
   8
   9 void PartCache::begin_rebuild()
  10 {
  11         if(rebuilding)
  12                 throw logic_error("nested rebuild");
  13         rebuilding = true;
  14
  15         next = parts.begin();
  16         current = parts.end();
  17 }
  18
  19 void PartCache::insert_special(const Part &part)
  20 {
  21         if(part.get_name().empty())
  22                 throw invalid_argument("PartCache::insert_special");
  23         if(!rebuilding)
  24                 throw logic_error("!rebuilding");
  25
  26         current = find_if(next, parts.end(), [&part](const CachedPart &p){ return p.part==&part; });
  27         if(current!=parts.end())
  28                 parts.erase(next, current);
  29
  30         if(current==parts.end())
  31                 current = parts.insert(next, CachedPart());
  32         else
  33                 *current = CachedPart();
  34         current->part = &part;
  35
  36         next = current;
  37         ++next;
  38 }
  39
  40 GL::Mesh &PartCache::create_mesh(const Part &part, const GL::Texture2D &tex)
  41 {
  42         if(!rebuilding)
  43                 throw logic_error("!rebuilding");
  44
  45         if(current!=parts.end() && current->texture==&tex)
  46                 return *current->mesh;
  47
  48         for(current=next; current!=parts.end(); ++current)
  49                 if(current->texture==&tex)
  50                 {
  51                         parts.erase(next, current);
  52                         break;
  53                 }
  54
  55         if(current==parts.end())
  56         {
  57                 current = parts.insert(next, CachedPart());
  58                 current->texture = &tex;
  59                 current->mesh = make_unique<GL::Mesh>((GL::TEXCOORD2, GL::COLOR4,GL::UNSIGNED_BYTE, GL::VERTEX2));
  60         }
  61         else
  62                 current->mesh->clear();
  63         current->part = &part;
  64
  65         next = current;
  66         ++next;
  67
  68         return *current->mesh;
  69 }
  70
  71 void PartCache::end_rebuild()
  72 {
  73         rebuilding = false;
  74         parts.erase(next, parts.end());
  75 }
  76
  77 } // namespace GLtk
  78 } // namespace Msp