source: orxonox.OLD/orxonox/branches/physics/src/subprojects/particles/framework.cc @ 4331

/* 
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...
*/

#include "framework.h"

#include "physics_engine.h"
#include "particle_engine.h"

#include "gui_gtk.h"
#include "p_node.h"
#include "null_parent.h"
#include "state.h"
#include "debug.h"
#include "graphics_engine.h"
#include "light.h"
#include "resource_manager.h"
#include "camera.h"


int verbose;

int quitGui(GtkWidget* widget, void* data);


void Framework::initModule()
{
  // Creating a Test Particle System
  ParticleSystem* system = new ParticleSystem(100000, PARTICLE_SPRITE);

  // Creating a Test Particle Emitter
  ParticleEmitter* emitter = new ParticleEmitter(Vector(0 , 1, 0));
  // Add the Flow from the Emitter into the System
  ParticleEngine::getInstance()->addConnection(emitter, system);
}

void* Framework::mainLoop(void* tmp)
{
  Framework* framework = Framework::getInstance();
  while(!framework->isFinished)
    {
      while(gtk_events_pending()) 
        gtk_main_iteration();

      // keyhandler returns false if sdl gets quit by some event
      framework->keyHandler();

      // tick the scene
      float dt = framework->tick();

      // Draw the scene
      framework->draw(dt);

    }
}

bool Framework::draw(float dt)
{
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
  glLoadIdentity(); // Reset the view
  
  ParticleEngine::getInstance()->draw(dt);

  camera->apply();
  
  SDL_GL_SwapBuffers(); // Swap the buffers
}


float Framework::tick()
{
  currFrame = SDL_GetTicks();
  float dt = (float)(currFrame - lastFrame) / 1000.0;
  lastFrame = currFrame;

  ParticleEngine::getInstance()->tick(dt);

  NullParent::getInstance()->update(dt);
  return dt;
}


bool Framework::keyHandler()
{
  // This is the main loop for the entire program and it will run until done==TRUE
  {
    // And poll for events
    SDL_Event event;
    while(SDL_PollEvent(&event))
    {
      switch (event.type) {
      case SDL_MOUSEMOTION:
        {
          Vector view = camera->getTarget()->getAbsCoor() - camera->getAbsCoor();
          Vector up = Vector(0, 1, 0);
          up = camera->getAbsDir().apply(up);
          Vector h = up.cross(view);
          Vector v = h.cross(view);
          h.normalize();
          v.normalize();

          if (mouseDown[1])
            camera->setRelCoor(camera->getRelCoor()+ h * event.motion.xrel *.05 - v * event.motion.yrel * .05);
          if (mouseDown[3])
            camera->getTarget()->setRelCoor(camera->getTarget()->getRelCoor()+ h * event.motion.xrel *.05 - v * event.motion.yrel * .05);
            
        }
        break;
      case SDL_MOUSEBUTTONDOWN:
        switch (event.button.button)
          {
          case 4:
            PRINTF(4)("MouseWheel up\n");
            camera->setRelCoor(camera->getRelCoor() + (camera->getTarget()->getAbsCoor() - camera->getAbsCoor())*.1);
            break;
          case 5:
            PRINTF(4)("MouseWheel down\n");
            camera->setRelCoor(camera->getRelCoor() - (camera->getTarget()->getAbsCoor() - camera->getAbsCoor())*.1);
            break;
          case 1:
          case 2:
          case 3:
            mouseDown[event.button.button] = true;
            break;
          }
            
        break;
      case SDL_MOUSEBUTTONUP:
        switch (event.button.button)
          {
          case 1:
          case 2:
          case 3:
            mouseDown[event.button.button] = false;
            break;
          }
        break;
      case SDL_VIDEORESIZE:
        GraphicsEngine::getInstance()->resolutionChanged(&event.resize);
        break;
      case SDL_KEYDOWN:
        switch (event.key.keysym.sym)
          {
          case SDLK_q:
          case SDLK_ESCAPE:
            quitGui(NULL, NULL);
            break;
          case SDLK_c:

            break;
          case SDLK_i:
            ParticleEngine::getInstance()->debug();
            break;
          case SDLK_a:
            camera->setRelCoor(camera->getRelCoor() + (camera->getTarget()->getAbsCoor() - camera->getAbsCoor())*.1);
            break;
          case SDLK_z:
            camera->setRelCoor(camera->getRelCoor() - (camera->getTarget()->getAbsCoor() - camera->getAbsCoor())*.1);
            break;
          case SDLK_h:
            this->printHelp();
            break;
          }
        break;
            
        // If a quit event was recieved
      case SDL_QUIT:
        // then we're done and we'll end this program
        quitGui(NULL, NULL);
        break;
      default:
        break;
      }

    }

    // Get the state of the keyboard keys
    keys = SDL_GetKeyState(NULL);

    // and check if ESCAPE has been pressed. If so then quit
    if(keys[SDLK_ESCAPE]) return false;
  }
  return true;
}

void Framework::quit(void)
{
  this->isFinished = true;
}

Framework* Framework::singletonRef = NULL;

Framework* Framework::getInstance(void)
{
  if (Framework::singletonRef == NULL)
    Framework::singletonRef = new Framework();
  return Framework::singletonRef;
}

Framework::Framework()
{
  this->isFinished = false;

  this->lastFrame = 0;
  // Create a new OpenGL window with the title "Cone3D Basecode" at
  // 640x480x32, fullscreen and check for errors along the way
  GraphicsEngine::getInstance();

  LightManager::getInstance();
  glEnable(GL_TEXTURE_2D);

  // Build the font from a TGA image font.tga in the data directory
  // Hide the mouse cursor
  SDL_ShowCursor(2);

  for (int i = 0; i <MOUSE_BUTTON_COUNT; i++)
    mouseDown[i] = false;

  ResourceManager::getInstance()->setDataDir(DATA_DIRECTORY);
 

  initModule();

  camera = new Camera();

  State::getInstance()->setCamera(camera, camera->getTarget());

  camera->setAbsCoor(Vector(10, 10, 0));

}

Framework::~Framework()
{
  delete GraphicsEngine::getInstance();

}



void Framework::printHelp(void) const
{
  PRINT(0)(" Help for the frameWork\n");
  PRINT(0)("========================\n");
  PRINT(0)("h - print thisHelp\n");
  PRINT(0)("i - state Information\n\n");
  PRINT(0)("\n");


}

int emitterChange(GtkWidget* nonInterest, void* widget)
{
  Option* option = (Option*) widget;
  const char* name = option->getTitle();
  char* valueC = option->save();
  float value = atof(valueC);

  ParticleEmitter* tmpEmit = ParticleEngine::getInstance()->getEmitterByNumber(1);
  if (tmpEmit)
    {
      if (!strcmp(name, "EmissionRate"))
        {
          tmpEmit->setEmissionRate(value);
          PRINT(3)("EmissionRate set to %f\n", value);
        }
      else if (!strcmp(name, "Velocity"))
        {
          tmpEmit->setEmissionVelocity(value);
          PRINT(3)("Velocity set to %f\n", value);
        }
      else if(!strcmp(name, "SpreadAngle"))
        {
          tmpEmit->setSpread(value);
          PRINT(3)("SpreadAngle set to %f\n", value);
        }
      else if(!strcmp(name, "EmitterType"))
        {
          if (!strcmp(valueC, "EMITTER_DOT"))
            tmpEmit->setType(EMITTER_DOT);
          else if (!strcmp(valueC, "EMITTER_PLANE"))
            tmpEmit->setType(EMITTER_PLANE);
          else if (!strcmp(valueC, "EMITTER_CUBE"))
            tmpEmit->setType(EMITTER_CUBE);
          PRINT(3)("EmitterType set to %s\n", valueC);    
        }
      else if(!strcmp(name, "EmitterSize"))
        {
          tmpEmit->setSize(value);
          PRINT(3)("EmitterSize set to %f\n", value);
        }
    }
  delete valueC;
}


int systemChange(GtkWidget* nonInterest, void* widget)
{
  Option* option = (Option*) widget;
  const char* name = option->getTitle();
  char* valueC = option->save();
  float value = atof(valueC);

  ParticleSystem* tmpSys = ParticleEngine::getInstance()->getSystemByNumber(1);
  if (tmpSys)
    {
      if (!strcmp(name, "StartRadius"))
        {
          tmpSys->setRadius(value, tmpSys->getEndRadius());
          PRINT(3)("ParticleStartRadius set to %f\n", value);
        }
      else if (!strcmp(name, "EndRadius"))
        {
          tmpSys->setRadius( tmpSys->getStartRadius(), value);
          PRINT(3)("ParticleEndRadius set to %f\n", value);
        }

      else if (!strcmp(name, "LifeSpan"))
        {
          tmpSys->setLifeSpan(value);
          PRINT(3)("ParticleLifeSpan set to %f\n", value);
        }

      else if (!strcmp(name, "ConserveFactor"))
        {
          tmpSys->setConserve(value);
          PRINT(3)("ParticleConserveFactor set to %f\n", value);
        }

      else if (!strcmp(name, "ParticleType"))
        {
          if (!strcmp(valueC, "PARTICLE_DOT"))
            tmpSys->setType(PARTICLE_DOT);
          else if (!strcmp(valueC, "PARTICLE_SPARK"))
            tmpSys->setType(PARTICLE_SPARK);
          else if (!strcmp(valueC, "PARTICLE_SPRITE"))
            tmpSys->setType(PARTICLE_SPRITE);

          PRINT(3)("ParticleType set to %s\n", valueC);
        }

      else if (!strcmp(name, "InheritSpeed"))
        {
          tmpSys->setInheritSpeed(value);
          PRINT(3)("ParticleInheritSpeed set to %f\n", value);
        }

    }
  delete valueC;
}


int quitGui(GtkWidget* widget, void* data)
{
#ifdef HAVE_GTK2
  gtk_main_quit();
  while(gtk_events_pending()) gtk_main_iteration();
  Framework::getInstance()->quit();
#endif /* HAVE_GTK2 */
}

void* Framework::initGui(void* argv)
{
  Window* guiMainWindow = NULL;
  
  initGUI(0, NULL);
  
  guiMainWindow = new Window("ParticlesFUN");
  {
    Box* windowBox = new Box('v');
    {
      Frame* emitterFrame = new Frame("emitter-settings");
      {
        Box* emitterBox = new Box('v');
        {
          emitterBox->fill(new Label("EmissionRate"));
          Slider* EmissionRate = new Slider("EmissionRate", 0, 1000);
          EmissionRate->connectSignal("value_changed", (void*)EmissionRate, emitterChange );
          emitterBox->fill(EmissionRate);
          
          emitterBox->fill(new Label("Velocity"));
          Slider* velocity = new Slider("Velocity", 0, 2);
          velocity->setExactness(3);
          velocity->connectSignal("value_changed", (void*)velocity, emitterChange );
          emitterBox->fill(velocity);
          
          emitterBox->fill(new Label("SpreadAngle"));
          Slider* SpreadAngle = new Slider("SpreadAngle", 0, M_PI);
          SpreadAngle->setExactness(3);
          SpreadAngle->connectSignal("value_changed", (void*)SpreadAngle, emitterChange );
          emitterBox->fill(SpreadAngle);

          emitterBox->fill(new Label("EmitterType"));
          Menu* EmitterType = new Menu("EmitterType");
          EmitterType->addItem("EMITTER_DOT");
          EmitterType->addItem("EMITTER_PLANE");
          EmitterType->addItem("EMITTER_CUBE");
          EmitterType->connectSignal("changed", (void*)EmitterType, emitterChange );      
          emitterBox->fill(EmitterType);

          emitterBox->fill(new Label("EmitterSize"));
          Slider* EmitterSize = new Slider("EmitterSize", 0, 100);
          EmitterSize->setExactness(1);
          EmitterSize->connectSignal("value_changed", (void*)EmitterSize, emitterChange );
          emitterBox->fill(EmitterSize);
        }
        emitterFrame->fill(emitterBox);
      }
      windowBox->fill(emitterFrame);
      
      Frame* systemFrame = new Frame("system-settings");
      {
        Box* systemBox = new Box('v');
        {
          systemBox->fill(new Label("StartRadius"));
          Slider* StartRadius = new Slider("StartRadius", 0, 10);
          StartRadius->setExactness(3);
          StartRadius->connectSignal("value_changed", (void*)StartRadius, systemChange );
          systemBox->fill(StartRadius);

          systemBox->fill(new Label("EndRadius"));
          Slider* EndRadius = new Slider("EndRadius", 0, 10);
          EndRadius->setExactness(3);
          EndRadius->connectSignal("value_changed", (void*)EndRadius, systemChange );
          systemBox->fill(EndRadius);

          systemBox->fill(new Label("LifeSpan"));
          Slider* LifeSpan = new Slider("LifeSpan", 0, 10);
          LifeSpan->setExactness(3);
          LifeSpan->connectSignal("value_changed", (void*)LifeSpan, systemChange );
          systemBox->fill(LifeSpan);
          
          systemBox->fill(new Label("ConserveFactor"));
          Slider* ConserveFactor = new Slider("ConserveFactor", 0, 1);
          ConserveFactor->setExactness(3);
          ConserveFactor->connectSignal("value_changed", (void*)ConserveFactor, systemChange );
          systemBox->fill(ConserveFactor);

          systemBox->fill(new Label("ParticleType"));
          Menu* ParticleType = new Menu("ParticleType");
          ParticleType->addItem("PARTICLE_DOT");
          ParticleType->addItem("PARTICLE_SPARK");
          ParticleType->addItem("PARTICLE_SPRITE");
          ParticleType->connectSignal("changed", (void*)ParticleType, systemChange );     
          systemBox->fill(ParticleType);
          
          systemBox->fill(new Label("InheritSpeed"));
          Slider* InheritSpeed = new Slider("InheritSpeed", 0, 1);
          InheritSpeed->setExactness(3);
          InheritSpeed->connectSignal("value_changed", (void*)InheritSpeed, systemChange );
          systemBox->fill(InheritSpeed);


        }
        systemFrame->fill(systemBox);
      }
      windowBox->fill(systemFrame);
      
      Button* quitButton = new Button("quit");
      
      quitButton->connectSignal("clicked", NULL, quitGui);
      //  Window::mainWindow->connectSignal("remove", this, GuiExec::quitGui);
      Window::mainWindow->connectSignal("destroy", NULL, quitGui);
      
      windowBox->fill(quitButton);
    }
    guiMainWindow->fill(windowBox);
  }
  Window::mainWindow->showall();
  Window::mainWindow->setSize(300, 500);
}

void* Framework::mainloopGui(void* tmp)
{
  mainloopGUI();
}



int main(int argc, char *argv[])
{
  verbose = 3;
  
  Framework* framework = Framework::getInstance();

  framework->initGui((void*)argv);
  //  framework->mainloopGui(NULL);

  framework->mainLoop(NULL);


  delete framework;
  // Kill the GL & SDL screens
  // And quit
  return 0;
}