Simple use of SDL_GetRelativeMouseState

SDL Development
#1

Hello all!
In the following program, which compiles without errors, I constantly get an output of x/y 0 0. Why?

Code:
#include
using namespace std;

#include “SDL.h”
#undef main

int x,y;

int main()
{

SDL_GetRelativeMouseState(&x,&y);
while(1)
{
	SDL_PumpEvents();
	SDL_GetRelativeMouseState(&x,&y);
	cout<<"x/y : "<<x<<" "<<y<<endl;
	cout<<"Press any key to continue...";
	cin.get();
	cout<<endl;
}
return 0;

}

#2

I’ve made a small program which prints out the mouse position in the console.
Hope it works the way you want. :slight_smile:

Code:

Code:

#include “SDL.h”

#include

SDL_Window* m_pWindow = NULL;
SDL_Renderer* m_pRenderer = NULL;

SDL_Event m_Event;

bool m_Running = true;

int m_MouseX = 0;
int m_MouseY = 0;

int main(int argv, char* args[])
{
// Initialize SDL
if(SDL_Init(SDL_INIT_EVERYTHING) == -1)
{
// If SDL for some reason fails to initialize
printf(“Error: failed to initialize SDL\n”);
}

else
{
	// Create the SDL window
	m_pWindow = SDL_CreateWindow("Mouse position", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, SDL_WINDOW_SHOWN);

	// If the SDL window has been successfully created
	if(m_pWindow)
	{
		// Create the SDL renderer	
		m_pRenderer = SDL_CreateRenderer(m_pWindow, -1, SDL_RENDERER_ACCELERATED);
	}
}

while(m_Running)
{
	while(SDL_PollEvent(&m_Event))
	{
		switch(m_Event.type)
		{
		case SDL_QUIT:
			m_Running = false;

		case SDL_MOUSEMOTION:
			{
				m_MouseX = m_Event.motion.x;
				m_MouseY = m_Event.motion.y;
				break;
			}
		}
	}

	// Print out the mouse position in the console
	printf("MouseX: %i, MouseY: %i\n", m_MouseX, m_MouseY);
}

// Destroy the SDL renderer
if(m_pRenderer)
	SDL_DestroyRenderer(m_pRenderer);

// Destroy the SDL window
if(m_pWindow)
	SDL_DestroyWindow(m_pWindow);

// Quit SDL
SDL_Quit();

return 0;

}

#3

I’ve made a small program which prints out the mouse position in the console.
Hope it works the way you want. :slight_smile:

Code:

Code:

#include “SDL.h”

#include

SDL_Window* m_pWindow = NULL;
SDL_Renderer* m_pRenderer = NULL;

SDL_Event m_Event;

bool m_Running = true;

int m_MouseX = 0;
int m_MouseY = 0;

int main(int argv, char* args[])
{
// Initialize SDL
if(SDL_Init(SDL_INIT_EVERYTHING) == -1)
{
// If SDL for some reason fails to initialize
printf(“Error: failed to initialize SDL\n”);
}

else
{
	// Create the SDL window
	m_pWindow = SDL_CreateWindow("Mouse Position", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, SDL_WINDOW_SHOWN);

	// If the SDL window has been successfully created
	if(m_pWindow)
	{
		// Create the SDL renderer	
		m_pRenderer = SDL_CreateRenderer(m_pWindow, -1, SDL_RENDERER_ACCELERATED);
	}
}

while(m_Running)
{
	while(SDL_PollEvent(&m_Event))
	{
		switch(m_Event.type)
		{
		case SDL_QUIT:
			{
				m_Running = false;
				break;
			}

		case SDL_MOUSEMOTION:
			{
				m_MouseX = m_Event.motion.x;
				m_MouseY = m_Event.motion.y;
				break;
			}
		}
	}

	// Print out the mouse position in the console
	printf("MouseX: %i, MouseY: %i\n", m_MouseX, m_MouseY);
}

// Destroy the SDL renderer
if(m_pRenderer)
	SDL_DestroyRenderer(m_pRenderer);

// Destroy the SDL window
if(m_pWindow)
	SDL_DestroyWindow(m_pWindow);

// Quit SDL
SDL_Quit();

return 0;

}

#4

I really thought this would be replied quickly due to being simple, but it seems its not the case.

Let me re-phrase my question then: Can somebody give me a program, preferably short, that takes raw mouse input and prints it on the screen in some way?