Messages

1

Graphics / Re: Grabbing a shape with the mouse

« on: August 17, 2010, 01:14:26 pm »

Code: [Select]

while(Input.IsMouseButtonDown(sf::Mouse::Left))
            selector.SetPosition(Input.GetMouseX(),Input.GetMouseY());

I'd at least change the while to an if, otherwise it won't do anything else if it's true- even render.

2

Graphics / Inheriting from Drawable

« on: January 06, 2010, 12:35:59 am »

Addendum:
Seems to work just fine when I use it in the code found on http://www.sfml-dev.org/tutorials/1.5/graphics-sprite.php in place of a sprite.

Am I declaring it in a manner that the compiler doesn't like? (I'm still getting to grips with C++)

As noted above, the below class compiles without error if I switch out MSprite for a standard sf::Sprite (it even seems to complain if I declare an instance of it in the class without ever actually referring to it).

Code: [Select]

class CGameEngine
  {
  public:
    void Init(const char* title, int width = 800, int height = 600, int bpp = 0, bool fullscreen = false);
    void Cleanup();

    void ChangeState(CGameState* state);
    void PushState(CGameState* state);
    void PopState();

    void HandleEvents();
    void Update();
    void Draw();

    bool Running() { return m_running; }
    void Quit() { m_running = false; }

    sf::RenderWindow screen;
    sf::Font defaultfont;

  private:
    // the stack of states
    std::vector<CGameState*> states;

    bool m_running;
    bool m_fullscreen;

    sf::Image cursorimage;
    MSprite cursor;

    bool _debug;
  };

Code: [Select]

#include <SFML/System.hpp>
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>

#include <cstdlib>

#include <sstream>
#include <stdio.h>

#include "gameengine.h"
#include "gamestate.h"

#include "csprite.h"

void CGameEngine::Init(const char* title, int width, int height, int bpp, bool fullscreen)
  {
  _debug = true;
  screen.Create(sf::VideoMode(800, 600), title);
  screen.SetFramerateLimit(60);
  screen.ShowMouseCursor(false);
  screen.Show(true);

  if (!cursorimage.LoadFromFile("./data/images/pointer.png"))
    Quit();

  cursor.Sprite.SetImage(cursorimage);

  m_running = true;

  printf("CGameEngine Init\n");
  }


void CGameEngine::Cleanup()
  {
  // cleanup the all states
  while (!states.empty())
    {
    states.back()->Cleanup();
    states.pop_back();
    }

  // switch back to windowed mode so other
  // programs won't get accidentally resized
  if (m_fullscreen)
    {
    }

  printf("CGameEngine Cleanup\n");

  // shutdown SFML
  screen.Close();
  }


void CGameEngine::ChangeState(CGameState* state)
  {
  // cleanup the current state
  if (!states.empty())
    {
    states.back()->Cleanup();
    states.pop_back();
    }

  // store and init the new state
  states.push_back(state);
  states.back()->Init(this);
  }


void CGameEngine::PushState(CGameState* state)
  {
  // pause current state
  if (!states.empty())
    {
    states.back()->Pause();
    }

  // store and init the new state
  states.push_back(state);
  states.back()->Init(this);
  }


void CGameEngine::PopState()
  {
  // cleanup the current state
  if (!states.empty())
    {
    states.back()->Cleanup();
    states.pop_back();
    }

  // resume previous state
  if (!states.empty())
    {
    states.back()->Resume();
    }
  }


void CGameEngine::HandleEvents()
  {
  const sf::Input& Input = screen.GetInput();
  MousePosition.x = Input.GetMouseX();
  MousePosition.y = Input.GetMouseY();

  // let the state handle events
  states.back()->HandleEvents(this);
  }


void CGameEngine::Update()
  {
  cursor.SetPosition(MousePosition);

  // let the state update the game
  states.back()->Update(this);
  }


void CGameEngine::Draw()
  {
  screen.Clear(sf::Color(0, 0, 0));
  // let the state draw the screen
  states.back()->Draw(this);
  screen.Draw(cursor);
  screen.Display(); //flip buffer
  }


(edit - would probably help if i included the implementation...)

3

Graphics / Inheriting from Drawable

« on: January 06, 2010, 12:16:13 am »

How is CGameEngine related to your code?

I'm using it to manage/switch between various states (ie. an intro, menu, game proper, etc).

4

Graphics / Inheriting from Drawable

« on: January 05, 2010, 11:50:42 pm »

I'm attempting to inherit from Drawable in order to have multiple sprites behaving as if they were one (with a view to using it for a 2D skeletal animation system) - my overall code compiles fine if I do not declare any instances of the below class.

Code: [Select]

#include <vector>

#include <SFML/Graphics.hpp>

class MSprite : public sf::Drawable
  {
  public:
    MSprite(sf::Image& Image, float Rotation = 0)
      {
      Sprite.SetImage(Image);
      Sprite.SetRotation(Rotation);
      DrawBehind = true;
      }

    bool DrawBehind;

    sf::Sprite Sprite;

    std::vector<MSprite> Children;

    virtual void Render(sf::RenderTarget& target) const
      {
      if (DrawBehind) //draw below (before) child sprites
        {
        target.Draw(Sprite);
        for (unsigned int i = 0; i < Children.size(); i++)
          {
          target.Draw(Children[i]);
          }
        }
      else //draw above (after) child sprites
        {
        for (unsigned int i = 0; i < Children.size(); i++)
          {
          target.Draw(Children[i]);
          }
        target.Draw(Sprite);
        }
      }
  };


I get the below error when trying to compile with a declaration, no errors if I don't.

Code: [Select]

c:\dev\000\main.cpp||In function `int main(int, char**)':|
c:\dev\000\main.cpp|17|error: no matching function for call to `CGameEngine::CGameEngine()'|
c:\dev\000\gameengine.h|15|note: candidates are: CGameEngine::CGameEngine(const CGameEngine&)|
||=== Build finished: 1 errors, 0 warnings ===|

I'm using a structure based mostly on this: http://gamedevgeek.com/tutorials/managing-game-states-in-c/, but changed to use SFML instead of SDL.

Am I missing something ludicrously simple, like I think I am?