Topics

1

Graphics / Settings texture wrapping to repeat using sf::Renderer

« on: June 08, 2011, 07:16:08 pm »

I was just trying out some ways to generate a racing track from a few points, generating the vertices worked out right but I'm having some problems with the texture coordinates. I currently have a distance variable which keeps track of the current track distance and a textureSize variable which determines how much pixels of the track the texture should cover.

The code which calculates the uv coordinates:

Code: [Select]


float textureSize = 64.0f //The texture is 64x64 so this should display it at the real scale.

// The two sides of the point in the track.
leftVertex.texCoords = sf::Vector2f(0.0f, distance / textureSize);
rightVertex.texCoords = sf::Vector2f(1.0f, distance / textureSize);


I render the vertices like this:

Code: [Select]


renderer.SaveGLStates();
   
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_WRAP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_WRAP);
   
renderer.SetTexture(&m_Texture);
renderer.Begin(sf::Renderer::TriangleStrip);
    for (int i = 0; i < m_sideVertices.size(); i++)
    {
        renderer.AddVertex(m_sideVertices[i].position.x,
                           m_sideVertices[i].position.y,
                           m_sideVertices[i].texCoords.x,
                           m_sideVertices[i].texCoords.y,
                           sf::Color::White);
    }
renderer.End();

renderer.RestoreGLStates();


But it looks like this (red lines show where the vertices are):


As you can see the beginning of the track (the left side) is textured correctly because the v coordinates are within the 0-1 range, after that the texture gets stretched out.

So is setting the texture wrapping mode to GL_REPEAT not working or am I using the wrong texture coordinates?

2

General / Get positional data from View in SFML 2.0

« on: May 06, 2011, 09:20:00 pm »

I just changed to SFML 2.0 and all went well until I couldn't find a way to retrieve data about the position of the current sf::View. I have a tile map and I only want to draw the tiles that are currently visible. The only way I thought of was to retrieve the data from the projection matrix but it seems kind of hacky :?.

3

General / Window only updates when mouse is moved over it.

« on: April 16, 2011, 10:52:28 am »

I just switched to Ubuntu and tried using SFML, however my RenderWindow only updates when I move the mouse cursor over it.

I use the code from the tutorial about Sprites and move the sprite by a tiny amount each frame. If I move the mouse for a few seconds the window keeps updating after I stop moving it, but after a few seconds the window stops updating.

Code: [Select]


#include <SFML/Graphics.hpp>
 
 int main()
 {
     sf::RenderWindow App(sf::VideoMode(800, 600), "SFML window");

     sf::Image Image;
     Image.LoadFromFile("data/circle.png");
     sf::Sprite Sprite(Image);

     while (App.IsOpened())
     {
         sf::Event event;
         while (App.GetEvent(event))
         {
             if (event.Type == sf::Event::Closed)
                 App.Close();
         }

         sprite.Move(20 * App.GetFrameTime(), 0);
 
         // Clear screen
         App.Clear();
 
         App.Draw(sprite);
 
         // Update the window
         App.Display();
     }
 
     return 0;
 }


4

General / Game won't start anymore

« on: December 14, 2010, 08:20:26 pm »

Hello, I've a bit of a problem here, I continued working on my game and all of a sudden it won't start any more  :shock:. When I click the .exe it does nothing for about 5 seconds and then a console window pops up which doesn't close directly when you try to. It works on the computer of a friend of mine so it's not in the code.

I know it's not a lot of information but is there anything I might have changed in my computer that can cause this?

5

Window / Disabling the CMD window that opens when creating a window

« on: December 06, 2010, 07:28:47 pm »

Sorry if this is already discussed but I couldn't find it.

Every time I create a RenderWindow it also opens a CMD window. When distributing my game I don't want it to open. I'm sure there is a very simple solution for this but I have not found it yet.

6

Window / Linker cannot resolve OpenGL functions

« on: November 06, 2010, 06:03:10 pm »

Hello, I tried compiling the tutorial which uses OpenGL to draw a cube on the screen. However I'm getting a bunch of linker errors which probably indicate that it can't find the OpenGL functions. I thought OpenGL was included by SFML/Window.hpp?
What am I doing wrong  :x .

The errors:
1>Main.obj : error LNK2001: unresolved external symbol __imp__glClearDepth@8
1>Main.obj : error LNK2001: unresolved external symbol __imp__glClear@4
1>Main.obj : error LNK2001: unresolved external symbol __imp__glClearColor@16
1>Main.obj : error LNK2001: unresolved external symbol __imp__glEnd@0
1>Main.obj : error LNK2001: unresolved external symbol __imp__glBegin@4
1>Main.obj : error LNK2001: unresolved external symbol __imp__glDepthMask@4
1>Main.obj : error LNK2001: unresolved external symbol __imp__glRotatef@16
1>Main.obj : error LNK2001: unresolved external symbol __imp__glVertex3f@12
1>Main.obj : error LNK2001: unresolved external symbol __imp__glMatrixMode@4
1>Main.obj : error LNK2001: unresolved external symbol __imp__glViewport@16
1>Main.obj : error LNK2001: unresolved external symbol __imp__glTranslatef@12
1>Main.obj : error LNK2001: unresolved external symbol __imp__glEnable@4
1>Main.obj : error LNK2001: unresolved external symbol __imp__glLoadIdentity@0