Messages

1

General / Game Speed Consistency

« on: April 14, 2014, 10:53:46 am »

How do I make sure that my game runs at the same speed on all computers? The problem occurred when i transferred my game project from my old laptop to my new one. The game runs too fast and is unplayable.

Game background: Its a small top-down car game with three ai's trying to shoot you down. Game ends when a bullet collides.

If any more information is required I'll be more than happy to share.

int main()
{      
        sf::Clock clock;
        bool end_game= false;
        initialize_cars();
        initialize_bullets();
        initialize_explosion_sprite();
    while (window.isOpen())
    {  
        sf::Event event;
        if (window.pollEvent(event))
        {
            if (event.type== sf::Event::Closed || (event.type== sf::Event::KeyReleased) && (event.key.code== sf::Keyboard::Escape))
                window.close();
        }
                       
        move_cars();
        set_bullet_timer(&clock);
        move_bullets();
       
                end_game= bullet_collision(&clock, &black_car, &blue_bullet);
                if(end_game== true)
                break;
               
                end_game= bullet_collision(&clock, &black_car, &red_bullet);
                if(end_game== true)
                break;
               
                for(int i=0; i<2; i++)
        {
                end_game= bullet_collision(&clock, &black_car, &green_bullet[i]);
                if(end_game== true)
                        break;
        }
        if(end_game== true)
                break;
       
                window.clear(sf::Color::White);
                display_cars();
                display_bullets();
        window.display();
    }
    return 0;
}

2

General / Re: How to Delete/Remove Sprite?

« on: February 26, 2014, 11:13:25 am »

Sorry to be unclear. Its my first attempt making a game and coding on sfml.

I have a "car sprite" which on collision with a "bullet sprite" should, well, for now disappear/get removed/get deleted.
 
Any help on how to achieve that?

3

General / How to Delete/Remove Sprite?

« on: February 26, 2014, 11:02:24 am »

mySprite.setTexture(NULL) gives syntax error.

Any alternatives?

4

General / Re: Changing from dev c++ to visual studio 2012

« on: September 13, 2013, 03:41:35 pm »

Im sorry I didn't get you...

This is the part of the code till it runs.

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

#define PI 3.14159265

using namespace std;

int main()
{
   const int xRes= 1300;
   const int yRes= 700;
   
   sf::RenderWindow window(sf::VideoMode(xRes, yRes), "Window");
   
   float carLength= 35, carBreadth= 15, bulletLength= 20, bulletBreadth= 10;
   
   float xCar= 100, yCar= 100;
   sf::Texture car_texture, bullet_texture;
   if(!car_texture.loadFromFile("black_car.png"))
      cout<<"Could not load image file"<<endl;

Then it breaks saying...

First-chance exception at 0x748EDCF8 (msvcr110.dll) in sfml_prac.exe: 0xC0000005: Access violation reading location 0x00511000.
Unhandled exception at 0x748EDCF8 (msvcr110.dll) in sfml_prac.exe: 0xC0000005: Access violation reading location 0x00511000.

5

General / Re: Changing from dev c++ to visual studio 2012

« on: September 13, 2013, 03:08:07 pm »

Problem occurs when the image is being loaded in the texture variable. Where exactly do i need to save the '.png' files? Or do i have the give the full path name? Right now there are in the debug folder along with the sfml dlls and project application/run file

6

General / Changing from dev c++ to visual studio 2012

« on: September 13, 2013, 02:42:30 pm »

I first got sfml up and running perfectly in visual studio 2012(got the green circle and everything).

Then I copy-pasted the code, since it was a small project containing only a main file.
Next I pasted a few sprites which I'm using in the code in the debug folder of my project in visual studio.

The project compiles and builds fine. When I run it, I get an unhandled exception with msvcr110.dll in braces.

Help will be really appreciated. 

7

General / Re: Simultaneous input

« on: July 19, 2013, 03:16:38 pm »

It took me while to realize the difference. xD Really dumb of me.

Thanks a lot.

8

General / Simultaneous input

« on: July 19, 2013, 02:37:26 pm »

How do I go about moving and turning the rectangle at the same time. He is my code..

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

#define PI 3.14159265

using namespace std;

void displace(sf::RectangleShape *shape, float angle)
{

}

int main()
{
        const int xRes= 800;
        const int yRes= 600;
       
        sf::RenderWindow window(sf::VideoMode(xRes, yRes), "Window");
       
        float rectLength= 20, rectBreadth= 10;
        sf::RectangleShape rectangle(sf::Vector2f(rectLength, rectBreadth));
       
        float xCod= 100, yCod= 100;
        rectangle.setPosition(xCod, yCod);
        rectangle.setFillColor(sf::Color::Black);
        rectangle.setOrigin(rectLength/2, rectBreadth/2);
       
        float direction, speed= 0.5;
       
        while(window.isOpen())
        {
                sf::Event event;
                while(window.pollEvent(event))
                {
                        if(event.type== sf::Event::Closed || (event.type== sf::Event::KeyReleased) && (event.key.code== sf::Keyboard::Escape))
                                window.close();
                }
               
                if(sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
                {
                        direction= rectangle.getRotation();
                        rectangle.move(speed*cos(direction*PI/180), speed*sin(direction*PI/180));
                }
               
                else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
                {
                        direction= rectangle.getRotation();
                        rectangle.move(-speed*cos(direction*PI/180), -speed*sin(direction*PI/180));
                }
               
                else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
                {
                        rectangle.rotate(-0.5);
                        direction= rectangle.getRotation();
                }
                else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
                {
                        rectangle.rotate(0.5);
                        direction= rectangle.getRotation();
                }
               
                window.clear(sf::Color::White);
                window.draw(rectangle);
                window.display();
        }
        return 0;
}

9

General / Re: How to create a shape with its axis of rotation in the center?

« on: July 19, 2013, 11:16:13 am »

Thanks. I did read it, ill try again. Maybe look for more examples.

10

General / How to create a shape with its axis of rotation in the center?

« on: July 19, 2013, 11:08:56 am »

I've created basic shapes like rectangles, triangles and lines but they all rotate from one end of the object. I want to uniformly rotate it from the center of the object. Intention is to create a car(top down) driving on the screen.

11

General / Re: Basic collision detection

« on: July 17, 2013, 02:19:02 pm »

Thanks a lot. It worked.

12

General / Re: Basic collision detection

« on: July 17, 2013, 01:38:00 pm »

if(x<0)
           {
              x= 0;
              rectangle.setPosition(x, y);
           }


I changed it into the above, still no difference.

13

General / Basic collision detection

« on: July 17, 2013, 12:15:52 pm »

I'm really sorry of asking such a basic question, but I tried fixing it with searches and the sfml documents and couldn't get it. Also, it's my first sfml/graphics program.

All i want to is for my rectangle to not go out of the screen.

Here's my code.   

#include <SFML/Graphics.hpp>

int main()
{
   float x= 50, y= 50, width= 20, height= 10, xVid= 800, yVid=600;
   float mov= 0.5;
   
    sf::RenderWindow window(sf::VideoMode(xVid, yVid), "SFML works!");
   
    sf::RectangleShape rectangle(sf::Vector2f(width, height));
    rectangle.setFillColor(sf::Color::White);
    rectangle.setPosition(x, y);

    while (window.isOpen())
    {   
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
           
            if(event.type== sf::Event::KeyReleased)
            {
               if(event.key.code== sf::Keyboard:: Escape)
                  window.close();
            }
        }      
       
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
        {
           
           if(x<0)
              x= 0;
           else
              rectangle.move(-mov,0);
        }   
           
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
        {
           if(x+width>600)
              x= 600- width;
           else
              rectangle.move(mov,0);
        }
       
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
        {
           if(y<0)
              y= 0;
           else
              rectangle.move(0, -mov);
        }
       
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
        {
           if(y+height> 800)
              y= 800- height;
           else
              rectangle.move(0, mov);
        }
       
        window.clear();
        window.draw(rectangle);
        window.display();
    }
    return 0;
}