source/object.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/strings/formatter.h>
   9 #include "except.h"
  10 #include "material.h"
  11 #include "mesh.h"
  12 #include "object.h"
  13 #include "objectinstance.h"
  14 #include "objectpass.h"
  15 #include "program.h"
  16 #include "programdata.h"
  17 #include "texture.h"
  18 #include "texunit.h"
  19
  20 using namespace std;
  21
  22 namespace Msp {
  23 namespace GL {
  24
  25 Object::Object():
  26         meshes(1, static_cast<Mesh *>(0)),
  27         material(0)
  28 {
  29         normal_pass=&passes[""];
  30 }
  31
  32 Object::~Object()
  33 {
  34         for(map<string, ObjectPass>::iterator i=passes.begin(); i!=passes.end(); ++i)
  35                 delete i->second.shdata;
  36 }
  37
  38 bool Object::has_pass(const string &pn) const
  39 {
  40         return passes.count(pn);
  41 }
  42
  43 const ObjectPass &Object::get_pass(const string &pn) const
  44 {
  45         map<string, ObjectPass>::const_iterator i=passes.find(pn);
  46         if(i==passes.end())
  47                 throw KeyError("Unknown pass");
  48         return i->second;
  49 }
  50
  51 void Object::render() const
  52 {
  53         render(*normal_pass, 0);
  54 }
  55
  56 void Object::render(const ObjectInstance &inst) const
  57 {
  58         render(*normal_pass, &inst);
  59 }
  60
  61 void Object::render(const string &pn) const
  62 {
  63         render(get_pass(pn), 0);
  64 }
  65
  66 void Object::render(const string &pn, const ObjectInstance &inst) const
  67 {
  68         render(get_pass(pn), &inst);
  69 }
  70
  71 void Object::render(const list<const ObjectInstance *> &insts) const
  72 {
  73         render(*normal_pass, insts);
  74 }
  75
  76 void Object::render(const string &pn, const list<const ObjectInstance *> &insts) const
  77 {
  78         render(get_pass(pn), insts);
  79 }
  80
  81 void Object::setup_render(const ObjectPass &pass) const
  82 {
  83         if(!meshes[0])
  84                 throw InvalidState("Trying to render Object without mesh");
  85
  86         if(pass.shprog)
  87         {
  88                 pass.shprog->bind();
  89                 pass.shdata->apply();
  90                 for(unsigned i=0; i<textures.size(); ++i)
  91                 {
  92                         TexUnit::activate(i);
  93                         textures[i]->bind();
  94                 }
  95         }
  96         else if(!textures.empty())
  97                 textures.front()->bind();
  98
  99         if(material)
 100                 material->apply();
 101 }
 102
 103 void Object::finish_render(const ObjectPass &pass) const
 104 {
 105         if(pass.shprog)
 106                 Program::unbind();
 107         for(unsigned i=textures.size(); i--;)
 108         {
 109                 TexUnit::activate(i);
 110                 Texture::unbind();
 111         }
 112 }
 113
 114 void Object::render(const ObjectPass &pass, const ObjectInstance *inst) const
 115 {
 116         setup_render(pass);
 117
 118         unsigned lod=0;
 119         if(inst)
 120         {
 121                 inst->setup_render(pass);
 122                 lod=min(inst->get_level_of_detail(), meshes.size()-1);
 123         }
 124
 125         meshes[lod]->draw();
 126
 127         if(inst)
 128                 inst->finish_render(pass);
 129
 130         finish_render(pass);
 131 }
 132
 133 void Object::render(const ObjectPass &pass, const list<const ObjectInstance *> &insts) const
 134 {
 135         setup_render(pass);
 136
 137         for(list<const ObjectInstance *>::const_iterator i=insts.begin(); i!=insts.end(); ++i)
 138         {
 139                 (*i)->setup_render(pass);
 140
 141                 unsigned lod=min((*i)->get_level_of_detail(), meshes.size()-1);
 142                 meshes[lod]->draw();
 143
 144                 (*i)->finish_render(pass);
 145         }
 146
 147         finish_render(pass);
 148 }
 149
 150
 151 Object::Loader::Loader(Object &o, Collection &c):
 152         obj(o),
 153         coll(c)
 154 {
 155         add("lod_mesh", &Loader::lod_mesh);
 156         add("material", &Object::material);
 157         add("material_inline", &Loader::material_inline);
 158         add("mesh",     &Loader::mesh);
 159         add("pass",     &Loader::pass);
 160         add("shader",   &Loader::shader);
 161         add("texture",  &Loader::texture);
 162 }
 163
 164 Object::Loader::~Loader()
 165 {
 166         for(map<string, ObjectPass>::iterator i=obj.passes.begin(); i!=obj.passes.end(); ++i)
 167                 if(i->second.shdata)
 168                 {
 169                         for(unsigned j=0; j<textures.size(); ++j)
 170                                 i->second.shdata->uniform(i->second.shprog->get_uniform_location(textures[j]), static_cast<int>(j));
 171                 }
 172 }
 173
 174 void Object::Loader::lod_mesh(unsigned l, const string &n)
 175 {
 176         obj.meshes.resize(l+1, 0);
 177         obj.meshes[l]=coll.get<Mesh>(n);
 178 }
 179
 180 void Object::Loader::material_inline()
 181 {
 182         throw Exception("material_inline not supported yet");
 183         /*RefPtr<Material> mat=new Material;
 184         load_sub(*mat);
 185         coll.add(format("%p%p", &obj, mat.get()), mat.get());
 186         obj.material=mat.release();*/
 187 }
 188
 189 void Object::Loader::mesh(const string &n)
 190 {
 191         obj.meshes[0]=coll.get<Mesh>(n);
 192 }
 193
 194 void Object::Loader::pass(const string &n)
 195 {
 196         if(obj.passes.count(n))
 197                 throw KeyError("Duplicate pass name");
 198         ObjectPass p;
 199         load_sub(p, coll);
 200         obj.passes[n]=p;
 201 }
 202
 203 void Object::Loader::shader(const string &n)
 204 {
 205         Program *shprog=coll.get<Program>(n);
 206         if(shprog)  // Allow for unsupported shaders
 207         {
 208                 RefPtr<ProgramData> shdata=new ProgramData;
 209                 load_sub(*shdata, *shprog);
 210
 211                 obj.normal_pass->shprog=shprog;
 212                 if(obj.normal_pass->shdata)
 213                         delete obj.normal_pass->shdata;
 214                 obj.normal_pass->shdata=shdata.release();
 215         }
 216 }
 217
 218 void Object::Loader::texture(const string &n)
 219 {
 220         unsigned eqsign=n.find('=');
 221         if(eqsign!=string::npos)
 222         {
 223                 obj.textures.push_back(coll.get<Texture>(n.substr(eqsign+1)));
 224                 textures.push_back(n.substr(0, eqsign));
 225         }
 226         else
 227         {
 228                 obj.textures.push_back(coll.get<Texture>(n));
 229                 textures.push_back(n);
 230         }
 231 }
 232
 233 } // namespace GL
 234 } // namespace Msp