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 CachedPart::~CachedPart()
  10 {
  11         delete mesh;
  12 }
  13
  14
  15 void PartCache::begin_rebuild()
  16 {
  17         if(rebuilding)
  18                 throw logic_error("nested rebuild");
  19         rebuilding = true;
  20
  21         next = parts.begin();
  22         current = parts.end();
  23 }
  24
  25 void PartCache::insert_special(const Part &part)
  26 {
  27         if(part.get_name().empty())
  28                 throw invalid_argument("PartCache::insert_special");
  29         if(!rebuilding)
  30                 throw logic_error("!rebuilding");
  31
  32         for(current=next; current!=parts.end(); ++current)
  33                 if(current->part==&part)
  34                 {
  35                         parts.erase(next, current);
  36                         break;
  37                 }
  38
  39         if(current==parts.end())
  40                 current = parts.insert(next, CachedPart());
  41         else
  42                 *current = CachedPart();
  43         current->part = &part;
  44
  45         next = current;
  46         ++next;
  47 }
  48
  49 GL::Mesh &PartCache::create_mesh(const Part &part, const GL::Texture2D &tex)
  50 {
  51         if(!rebuilding)
  52                 throw logic_error("!rebuilding");
  53
  54         if(current!=parts.end() && current->texture==&tex)
  55                 return *current->mesh;
  56
  57         for(current=next; current!=parts.end(); ++current)
  58                 if(current->texture==&tex)
  59                 {
  60                         parts.erase(next, current);
  61                         break;
  62                 }
  63
  64         if(current==parts.end())
  65         {
  66                 current = parts.insert(next, CachedPart());
  67                 current->texture = &tex;
  68                 current->mesh = new GL::Mesh((GL::TEXCOORD2, GL::COLOR4,GL::UNSIGNED_BYTE, GL::VERTEX2));
  69         }
  70         else
  71                 current->mesh->clear();
  72         current->part = &part;
  73
  74         next = current;
  75         ++next;
  76
  77         return *current->mesh;
  78 }
  79
  80 void PartCache::end_rebuild()
  81 {
  82         rebuilding = false;
  83         parts.erase(next, parts.end());
  84 }
  85
  86 } // namespace GLtk
  87 } // namespace Msp