Messages

1

General / Handling time to delay?

« on: January 09, 2011, 08:33:29 pm »

Hi all.

I have a little game with a shooting feature I want to hold down a button to shoot but I don´t want it to shoot all the time, so can I use sf::Clock to just make it wait between all generating shots?

2

Graphics / use shapes in vector

« on: January 04, 2011, 11:14:29 pm »

circles.push_back(new Circle());

The new Circle object already contains a sf::Shape as a private member, even though it doesn't have an actual Circle associated with it.

I don't know your goal with that, but you should rethink your design, a lot of weird things there

I have

Code: [Select]


void Circle::generateCircle()
{
    Circle* circle = new Circle;
    circle->sf::Shape::Circle(100, 50, 50, sf::Color::Red);
    circles.push_back(circle);
}



but it doesn´t save the attributes to the vector, I dont even know if it is possible to save them in vectors.

I need more than one circle and I thought the best way to stack them where in a vector.

3

Graphics / use shapes in vector

« on: January 04, 2011, 10:05:46 pm »

I have a problem.

I have a class method where I declare a new Shape. i want to stack this in a vector.

Code: [Select]

#include <SFML/Graphics.hpp>
#include <iostream>
#include <vector>

class Circle : sf::Shape
{
    private:
    sf::Shape circle;
    int radius;
    std::vector <Circle*> circles;
    int x;
    int y;
    public:
    void generateCircle();
    void setValues(int x, int y);
    void draw(sf::RenderWindow& App);
    Circle();
};



and the method

Code: [Select]



void Circle::generateCircle()
{
    Circle* circle = new Circle;
    circles->sf::Shape ?
    circles.push_back(circle);
}

how can I declare the shape in to the vector?

4

Graphics / Draw sprite using vector

« on: December 30, 2010, 01:57:06 pm »

Code: [Select]

void Bullet::move(int x, int y)
{
    for(unsigned int i = 0; i < bullets.size();  i++){
        bullets[i]->Move(x, y);
    }
}

That should do, to move ALL the bullets : )

THX a lot for a fast answer I belive that saved my day

5

Graphics / Draw sprite using vector

« on: December 30, 2010, 01:41:00 pm »

I solved it.

Now it´s just that how to move the bullet/sprite;

Code: [Select]


void Bullet::generateBullet()
{
    Missile* sprite = new Missile;
    sprite->SetImage(Image);
    sprite->Resize(300, 200);
    move();
    bullets.push_back(sprite);
}
//Here is the problem... I can´t use the sprite above in the next method.

//x = 20; y = 0;
void Bullet::move()
{
    sprite.Move(x, y);
}

void Bullet::draw(sf::RenderWindow& App)
{
    for(unsigned int i = 0; i < bullets.size(); i++)
    {
        App.Draw(*bullets[i]);
    }
}



6

Graphics / Draw sprite using vector

« on: December 30, 2010, 11:35:54 am »

If the vector is declared as vector<Sprite*>, it will expect Sprite* objects to be added.

If your Bullet class is not inherited from Sprite, it has no relation to Sprite class, therefore, it can't be inserted.

Possible fix:

When declaring Bullet class: class Bullet : public Sprite{..};

Another possible fix:

Instead of declaring the vector as vector<Sprite*>, declare it as vector<Bullet*>

To render everything, you can do something like this:

Code: [Select]

for(unsigned int i = 0; i < bullets.size(); i++){
          App.Draw(bullets[i]);
}

Note: it will only work if the object "bullets" is a Sprite, or inherits from Sprite.

Hope it helps

How do I inherits a vector to a Sprite ? I have declared the bullet class: class Bullet : public sf::Sprite

and the vector to std::vector<Bullet> bullets; in the class.

But then drawing it just don´t make it with App.Draw(bullets)

do I have to declare it in some other way? or in the class method somewhere?

7

Graphics / Draw sprite using vector

« on: December 29, 2010, 09:21:32 pm »

Hello!

I am trying to use std::vector stl too make a little shootergame. But I don´t know how to save a sprite to a vector.

I have

Code: [Select]


#include "Sprite.h"

Bullet::Bullet()
{
    x = 100;
    y = 100;
    if(!Image.LoadFromFile("bullet.jpg"))
    {
        //Error
    }
}

void Bullet::shoot()
{
    Bullet* bullet1 = new Bullet;
    bullet1->SetImage(Image);
    bullets.push_back(bullet1);
}

void Bullet::drawBullet()
{
    bullet.SetImage(Image);
}

void Bullet::generateBullet()
{
    Bullet* bullet = new Bullet;
    bullets.push_back(bullet);

}
void Bullet::draw(sf::RenderWindow& App)
{
    App.Draw(bullet);
}



But the I can´t save the file to the vector who are vector<Sprite*> bullets; in bullet class.

I want to App.Draw(bullets);

What do I need to do?

8

Window / Many events

« on: February 25, 2010, 12:15:38 am »

I finally solved it:D

The problem was that I didn´t know where I should put the cScreen class, and I didn´t know that it was suppose do be called like the public Screen

So now its called class cScreen and public Screen, and it doesn´t say so in the tutorial, maybe it´s some kind of linking problem. But know it works perfect. and hopefully now I can make my game.

Thanks for ther help anyway

9

Window / Many events

« on: February 24, 2010, 11:18:47 pm »

Code: [Select]

class screen_0: public Screen

Code: [Select]

//Screens preparations
    screen_0 s0;
    Screens.push_back (&s0);

error: no matching function for call to `std::vector<cScreen*, std::allocator<cScreen*> >::push_back(screen_0*)'
(...)
note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = cScreen*, _Alloc = std::allocator<cScreen*>]

The error says it. Seems that you have a class named "cScreen", the error is saying that your Screens vector is of type std::vector<cScreen*>, and you're trying to add an element of type screen_0* (which base class is of type Screen, and not cScreen. Do you have a class cScreen and another named Screen  :?:

I have three classes, screen_0, screen_1 and cScreen

I have five files. main.cpp, screen.hpp, screens.hpp, screen_0.hpp, screen_1.hpp

10

Window / Many events

« on: February 24, 2010, 08:41:44 pm »

I have tried a lot now and I don´t gets it to work.

Code: [Select]

   //Screens preparations
    screen_0 s0;
    Screens.push_back (&s0);

There I get an error.

D:\Programmering\Screens\main.cpp||In function `int main(int, char**)':|
D:\Programmering\Screens\main.cpp|22|error: no matching function for call to `std::vector<cScreen*, std::allocator<cScreen*> >::push_back(screen_0*)'|
C:\Program\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\include\c++\3.4.5\bits\stl_vector.h|557|note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = cScreen*, _Alloc = std::allocator<cScreen*>]|
||=== Build finished: 1 errors, 0 warnings ===|

This error I only get when I write:

Code: [Select]

class screen_0: public Screen
and if I get this code

Code: [Select]

class screen_0: public Screen
{
private:
    int alpha_max;
    int alpha_div;
    bool playing;
public:
    screen_0 (void);
    virtual int Run (sf::RenderWindow &App);
};


Here I get an error to if I write public Screen after the class.

D:\Programmering\Screens\screen_0.hpp|5|error: expected class-name before '{' token|
D:\Programmering\Screens\main.cpp||In function `int main(int, char**)':|
D:\Programmering\Screens\main.cpp|22|error: no matching function for call to `std::vector<cScreen*, std::allocator<cScreen*> >::push_back(screen_0*)'|
C:\Program\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\include\c++\3.4.5\bits\stl_vector.h|557|note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = cScreen*, _Alloc = std::allocator<cScreen*>]|

I don´t now what to do, can it be some linking error?

11

Window / Many events

« on: February 21, 2010, 12:35:34 am »

I only want a menu and don´t want to load the game before the menu. You now like a real game so I don´t will see the game in the background while I am in the menu.

Perhaps you want something like this?

yeah, but I didn´t got it to work

So I hopefully thought it was some easier way to handle many events.

12

Window / Many events

« on: February 20, 2010, 07:28:35 am »

What do you want to achieve by doing this? There is probably another way.

You normally only have one sf::Event instance, which doesn't live very long. Some related code in the main loop might look as follows:

Code: [Select]

sf::Event event;
while (renderWindow.GetEvent(event))
{
    // react to events here
}
// after the loop, the event isn't interesting anymore

okey, thx I only want a menu and don´t want to load the game before the menu. You now like a real game so I don´t will see the game in the background while I am in the menu.

But thanks I shall see what I can do now. And hopefully it will work.

13

Window / Many events

« on: February 18, 2010, 02:15:47 am »

Hello

Is there away you can have many different events?

Like different classes and functions.

sf::Event Run;
sf::Event Meny;

Like that?

14

General discussions / SFML 1.6 released soon

« on: January 28, 2010, 11:10:01 pm »

I don´t know if it´s already fixed but when I am using font I get this memory error

Can you tell me more about this error?

It says something like this, I shall translate the best I can.

program-exe - Programfail

The instruction on "0x6903a33a" referd to th memory on "0x00000054". It didn´t perform a memory arrangment. This error returned: The memory could not be "read".

It pops up everytime a close the window when I draw use/draw a font.

15

General discussions / SFML 1.6 released soon

« on: January 28, 2010, 07:46:53 pm »

I don´t know if it´s already fixed but when I am using font I get this memory error. Maybe it should be fixed