SFML community forums

Help => Graphics => Topic started by: Asteroid on August 07, 2012, 03:02:54 am

Title: Textured Cube.
Post by: Asteroid on August 07, 2012, 03:02:54 am

Hey there,
I'm trying to Texture this white cube but keep failing. Whenever i Run it no Texture appears on the cube. I tried different ways but its still not working.
The code is below that i'm using.

#include <SFML/Window.hpp>
#include <SFML/OpenGL.hpp>
#include<SFML/Graphics.hpp>
#include <GL/gl.h>
#include <GL/glu.h>
#include <iostream>


GLfloat     Rotate;


using namespace std;
int main()
{
    // create the window
    sf::RenderWindow window(sf::VideoMode(800, 600), "OpenGL", sf::Style::Default, sf::ContextSettings(32));
    window.setVerticalSyncEnabled(true);

    glClearDepth(1.f);
    glClearColor(0.f, 0.f, 0.f, 0.f);
        glMatrixMode(GL_PROJECTION);

    glEnable(GL_DEPTH_TEST);
    // load resources, initialize the OpenGL states, ...

   sf::Texture texture;



    // run the main loop
    bool running = true;
    while (running)
    {
        // handle events
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
            {
                // end the program
                running = false;
            }
            else if (event.type == sf::Event::Resized)
            {
                // adjust the viewport when the window is resized
                glViewport(0, 0, event.size.width, event.size.height);
            }
        }

        // clear the buffers

        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glLoadIdentity();
        gluPerspective(45.0f, 800.0f / 600.0f, 1.0f, 500.0f);
        // draw...

     glTranslatef(0.0f,0.0f,-5.0f);
     glRotatef(Rotate,1.0f,1.0f,1.0f);
         glBindTexture(GL_TEXTURE_2D, image.loadFromFile("test.png"));               // Select Our Texture


glBegin(GL_QUADS);
    // Front Face
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);  // Top Left Of The Texture and Quad
    // Back Face
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);  // Bottom Left Of The Texture and Quad
    // Top Face
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,  1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,  1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);  // Top Right Of The Texture and Quad
    // Bottom Face
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    // Right face
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    // Left Face
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);  // Top Left Of The Texture and Quad
glEnd();
 
     Rotate+=0.5f;


        // end the current frame (internally swaps the front and back buffers)
        window.display();
 
    }

    // release resources...


    return TRUE;
}

And just so you know I've putted the test.png file in the Project folder.

Title: Re: Textured Cube.
Post by: Laurent on August 07, 2012, 08:05:34 am

Quote

glBindTexture(GL_TEXTURE_2D, image.loadFromFile("test.png"));

loadFromFile returns either true of false, not a valid OpenGL texture identifier. You need to create the OpenGL texture yourself (glGenTextures, glTexImage2D, ...). And you shouldn't load the image from disk inside your game loop ;)

You should have a look at the OpenGL example in SFML.

Title: Re: Textured Cube.
Post by: Asteroid on August 07, 2012, 07:36:57 pm

The Samples are really helpful. I didn't know about them.
Thanks for your Help. :)

Title: Re: Textured Cube.
Post by: eXpl0it3r on August 07, 2012, 07:44:48 pm

Quote from: Asteroid on August 07, 2012, 07:36:57 pm

I didn't know about them.

It's quite normal for libraries to ship with examples, you should always keep an eye out for them, when using a new library, they often will show nearlly all the possibilites that a library gives in an easy and understandable way. ;)

Title: Re: Textured Cube.
Post by: Asteroid on August 07, 2012, 08:02:28 pm

Well It's working, But there is still one problem.
take a look at the code.

#include <SFML/Window.hpp>
#include <SFML/OpenGL.hpp>
#include<SFML/Graphics.hpp>
#include <GL/gl.h>
#include <GL/glu.h>
#include <iostream>


GLfloat     Rotate;

int width, height;
   
using namespace std;
int main()
{
    // create the window
    sf::RenderWindow window(sf::VideoMode(800, 600), "OpenGL", sf::Style::Default, sf::ContextSettings(32));
    window.setVerticalSyncEnabled(true);
        width = 256;
    height = 256;
    glClearDepth(1.f);
    glClearColor(0.f, 0.f, 0.f, 0.f);
    glMatrixMode(GL_PROJECTION);
    glDepthMask(GL_TRUE);
    glEnable(GL_DEPTH_TEST);
    // load resources, initialize the OpenGL states, ...

    GLuint Texture = 0;
    {
        sf::Image Image;
        if (!Image.loadFromFile("Data/Crate.bmp"))
            return EXIT_FAILURE;
        glGenTextures(1, &Texture);
        glBindTexture(GL_TEXTURE_2D, Texture);
        gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, width, height, GL_RGBA, GL_UNSIGNED_BYTE, Image.getPixelsPtr());
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    }
    // run the main loop

    bool running = true;
    while (running)
    {
        // handle events
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
            {
                // end the program
                running = false;
            }
            else if (event.type == sf::Event::Resized)
            {
                // adjust the viewport when the window is resized
                glViewport(0, 0, event.size.width, event.size.height);
            }
        }

        // clear the buffers

        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        glLoadIdentity();
        gluPerspective(45.0f, 800.0f / 600.0f, 1.0f, 500.0f);
        // draw...

     glTranslatef(0.0f,0.0f,-5.0f);
     glRotatef(Rotate,1.0f,1.0f,1.0f);
         glEnable(GL_TEXTURE_2D);
     glBindTexture(GL_TEXTURE_2D, Texture);
     glColor4f(1.f, 1.f, 1.f, 1.f);

glBegin(GL_QUADS);
    // Front Face
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);  // Top Left Of The Texture and Quad
    // Back Face
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);  // Bottom Left Of The Texture and Quad
    // Top Face
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,  1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,  1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);  // Top Right Of The Texture and Quad
    // Bottom Face
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    // Right face
    glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f, -1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);  // Top Left Of The Texture and Quad
    glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f,  1.0f);  // Bottom Left Of The Texture and Quad
    // Left Face
    glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);  // Bottom Left Of The Texture and Quad
    glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  1.0f);  // Bottom Right Of The Texture and Quad
    glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,  1.0f,  1.0f);  // Top Right Of The Texture and Quad
    glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  1.0f, -1.0f);  // Top Left Of The Texture and Quad
glEnd();
 
     Rotate+=0.5f;


        // end the current frame (internally swaps the front and back buffers)
        window.display();
 
    }

    // release resources...


    return TRUE;
}

In this code line.

 gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, width, height, GL_RGBA, GL_UNSIGNED_BYTE, Image.getPixelsPtr());

I had to define width and height manually by using

int width, height;
width = 256;
height = 256;

In the sample which is old from 1.6 version.(I use 2.0)
It use Image.getWidth, Image.getHeight.
Which doesn't work in this version.
Is there any other way to do this? Instead of defining the size manually.
Like there was a way in 1.6 version.

Title: Re: Textured Cube.
Post by: G. on August 07, 2012, 08:17:17 pm

Yes, use getSize() (http://www.sfml-dev.org/documentation/2.0/classsf_1_1Image.php#a5c3e9bebdc001c3ebf85ca97039fc86b) ;)