Nebula Init.m

  texture = [[Texture textureNamed:[data objectForKey:@"texture"]] retain];
  
  pos.x       = [[data valueForKeyPath:@"position.x"] floatValue];
  pos.y       = [[data valueForKeyPath:@"position.y"] floatValue];
  
  size        = [[data objectForKey:@"size"]        floatValue];
  angle       = (GLfloat)(rand() % 360);
  opacity     = [[data objectForKey:@"opacity"]     floatValue];
  
  drag        = [[data objectForKey:@"drag"]        floatValue];
  energyRegen = [[data objectForKey:@"energyRegen"] floatValue];
  shieldRegen = [[data objectForKey:@"shieldRegen"] floatValue];
  armorRegen  = [[data objectForKey:@"armorRegen"]  floatValue];