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