XY axis run time values display based on the mouse

OpenGL OpenGL: Basic Coding
1

Hi all,

I’m new to Open GL programming. I have developed one application,
where in which I was able to display a bmp image and also able to bind it to a polygon top face.

Now my requirment is such that, I want to display the run time X & Y axis values based on the mouse click. ( example, when u open an image in linux, when ever mouse pointer changes, x y values also varies…) Now i want this feature to be in my application.

Pls, if any one has done coding, help me out guys!!

Thanks

2

int lastDirectionX, lastDirectionY;

void mouse ( int button, int state, int x, int y )
{
lastDirectionX = x;
lastDirectionY = y;
}

And in your main, add:

glutMouseFunc(mouse);

This only works when the user press the button of the mouse.

void mouse (int x, int y )
{
lastDirectionX = x;
lastDirectionY = y;
}

And in your main, add:

glutPassiveMotionFunc(mouse)

This works all the time so you can know in every moment where the mouse is. I imagine that function is heavy so it is called too many times.

Now, you only have to show tha values of the global variables.

3

thanks Saar. it was a timely help from you.

Thank you very much.

I tried the second method, which works fine for me… For 1st one i already defined some other operation, so settled for 2nd.