Messages

1

Graphics / Re: Setting up Rendering In a Separate Thread.

« on: May 20, 2012, 07:17:47 pm »

This is what I tried putting into a thread;

void Render(void * data)
{
        sf::RenderWindow &window = *(static_cast<sf::RenderWindow*>(data));
       
        while(window.isDone())
        {
                // Render 3D
                glLoadIdentity();
                glTranslatef( 0, 0, -5 );

                glBegin(GL_QUADS);
                          glTexCoord2f( 0.0f, 1.0f ); glVertex3f( -1.0f, -1.0f, 1.0f );
                          glTexCoord2f( 1.0f, 1.0f ); glVertex3f(  1.0f, -1.0f, 1.0f );
                          glTexCoord2f( 1.0f, 0.0f ); glVertex3f(  1.0f,  1.0f, 1.0f );
                          glTexCoord2f( 0.0f, 0.0f ); glVertex3f( -1.0f,  1.0f, 1.0f );

                          glTexCoord2f( 0.0f, 0.0f ); glVertex3f( -1.0f, -1.0f, -1.0f );
                          glTexCoord2f( 0.0f, 1.0f ); glVertex3f( -1.0f,  1.0f, -1.0f );
                          glTexCoord2f( 1.0f, 1.0f ); glVertex3f(  1.0f,  1.0f, -1.0f );
                          glTexCoord2f( 1.0f, 0.0f ); glVertex3f(  1.0f, -1.0f, -1.0f );

                          glTexCoord2f( 1.0f, 1.0f ); glVertex3f( -1.0f,  1.0f, -1.0f );
                          glTexCoord2f( 1.0f, 0.0f ); glVertex3f( -1.0f,  1.0f,  1.0f );
                          glTexCoord2f( 0.0f, 0.0f ); glVertex3f(  1.0f,  1.0f,  1.0f );
                          glTexCoord2f( 0.0f, 1.0f ); glVertex3f(  1.0f,  1.0f, -1.0f );

                          glTexCoord2f( 0.0f, 1.0f ); glVertex3f( -1.0f, -1.0f, -1.0f );
                          glTexCoord2f( 1.0f, 1.0f ); glVertex3f(  1.0f, -1.0f, -1.0f );
                          glTexCoord2f( 1.0f, 0.0f ); glVertex3f(  1.0f, -1.0f,  1.0f );
                          glTexCoord2f( 0.0f, 0.0f ); glVertex3f( -1.0f, -1.0f,  1.0f );

                          glTexCoord2f( 0.0f, 0.0f ); glVertex3f( 1.0f, -1.0f, -1.0f );
                          glTexCoord2f( 0.0f, 1.0f ); glVertex3f( 1.0f,  1.0f, -1.0f );
                          glTexCoord2f( 1.0f, 1.0f ); glVertex3f( 1.0f,  1.0f,  1.0f );
                          glTexCoord2f( 1.0f, 0.0f ); glVertex3f( 1.0f, -1.0f,  1.0f );

                          glTexCoord2f( 1.0f, 0.0f ); glVertex3f( -1.0f, -1.0f, -1.0f );
                          glTexCoord2f( 0.0f, 0.0f ); glVertex3f( -1.0f, -1.0f,  1.0f );
                          glTexCoord2f( 0.0f, 1.0f ); glVertex3f( -1.0f,  1.0f,  1.0f );
                          glTexCoord2f( 1.0f, 1.0f ); glVertex3f( -1.0f,  1.0f, -1.0f );
                        glEnd( );

                glLoadIdentity();


               
                window.display();
                glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                glMatrixMode(GL_MODELVIEW);
                glLoadIdentity();
        }
}

And the program crashed with the output:

[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
rthread: ../../src/xcb_io.c:273: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
Aborted

2

Graphics / Re: Setting up Rendering In a Separate Thread.

« on: May 19, 2012, 09:40:01 pm »

Well I've been reworking my event loop. And I've managed to reduce the amount of necessary event checks to a much smaller amount. And now the mouse move lag is undetectable. Though I'm still open to methods of setting up the rendering code in a separate thread. Currently the program crashes whenever I attempt it.

3

Graphics / Re: Setting up Rendering In a Separate Thread.

« on: May 19, 2012, 08:38:50 pm »

example:

Code: [Select]

if((event.type == sf::Event::MouseButtonPressed) && (event.mouseButton.button == sf::Mouse::Left))
myclass.doThis = true;
I should also mention, I'm using SFML 2.0 RC.
And I didn't experience this in SFML 1.6.

But besides this, I'd still like to know how to set up a separate Render Thread.

4

Graphics / Re: Setting up Rendering In a Separate Thread.

« on: May 19, 2012, 08:20:59 pm »

sf::Event::MouseMoved occurs  about 4-6 times a frame, If thats what you meant. Its a small lag. Hardly
noticeable, yet still noticeable. From what I've seen, the more events I check for in the event loop, whatever they may be, the more sf::Event::MouseMoved events I get. Is it something I'm doing wrong?

5

Graphics / Setting up Rendering In a Separate Thread.

« on: May 19, 2012, 07:54:53 pm »

Hello. I'm experiencing some lag during my program's event loop when I move the mouse. So I was hoping to someone could direct me to a method for separating the event loop from the rendering code with a separate thread.