mirror of
https://github.com/SFML/SFML.git
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c237305f9b
git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1362 4e206d99-4929-0410-ac5d-dfc041789085
158 lines
5.8 KiB
C++
158 lines
5.8 KiB
C++
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////////////////////////////////////////////////////////////
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// Headers
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////////////////////////////////////////////////////////////
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#include <SFML/Graphics.hpp>
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#include <SFML/OpenGL.hpp>
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#include <iostream>
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////////////////////////////////////////////////////////////
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/// Entry point of application
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///
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/// \return Application exit code
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///
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////////////////////////////////////////////////////////////
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int main()
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{
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// Create the main window
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sf::RenderWindow window(sf::VideoMode(800, 600), "SFML OpenGL");
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// Create a sprite for the background
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sf::Image backgroundImage;
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if (!backgroundImage.LoadFromFile("datas/opengl/background.jpg"))
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return EXIT_FAILURE;
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sf::Sprite background(backgroundImage);
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// Load an OpenGL texture.
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// We could directly use a sf::Image as an OpenGL texture (with its Bind() member function),
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// but here we want more control on it (generate mipmaps, ...) so we create a new one from the image pixels
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GLuint texture = 0;
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{
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sf::Image image;
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if (!image.LoadFromFile("datas/opengl/texture.jpg"))
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return EXIT_FAILURE;
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glGenTextures(1, &texture);
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glBindTexture(GL_TEXTURE_2D, texture);
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gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, image.GetWidth(), image.GetHeight(), GL_RGBA, GL_UNSIGNED_BYTE, image.GetPixelsPtr());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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}
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// Enable Z-buffer read and write
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glEnable(GL_DEPTH_TEST);
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glDepthMask(GL_TRUE);
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glClearDepth(1.f);
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// Setup a perspective projection
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(90.f, 1.f, 1.f, 500.f);
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// Bind our texture
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, texture);
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glColor4f(1.f, 1.f, 1.f, 1.f);
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// Create a clock for measuring the time elapsed
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sf::Clock clock;
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// Start game loop
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while (window.IsOpened())
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{
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// Process events
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sf::Event event;
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while (window.GetEvent(event))
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{
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// Close window : exit
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if (event.Type == sf::Event::Closed)
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window.Close();
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// Escape key : exit
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if ((event.Type == sf::Event::KeyPressed) && (event.Key.Code == sf::Key::Escape))
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window.Close();
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// Adjust the viewport when the window is resized
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if (event.Type == sf::Event::Resized)
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glViewport(0, 0, event.Size.Width, event.Size.Height);
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}
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// Draw the background
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window.SaveGLStates();
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window.Draw(background);
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window.RestoreGLStates();
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// Activate the window before using OpenGL commands.
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// This is useless here because we have only one window which is
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// always the active one, but don't forget it if you use multiple windows
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window.SetActive();
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// Clear the depth buffer
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glClear(GL_DEPTH_BUFFER_BIT);
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// We get the position of the mouse cursor, so that we can move the box accordingly
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float x = window.GetInput().GetMouseX() * 200.f / window.GetWidth() - 100.f;
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float y = -window.GetInput().GetMouseY() * 200.f / window.GetHeight() + 100.f;
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// Apply some transformations
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(x, y, -100.f);
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glRotatef(clock.GetElapsedTime() * 50, 1.f, 0.f, 0.f);
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glRotatef(clock.GetElapsedTime() * 30, 0.f, 1.f, 0.f);
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glRotatef(clock.GetElapsedTime() * 90, 0.f, 0.f, 1.f);
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// Draw a cube
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float size = 20.f;
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glBegin(GL_QUADS);
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glTexCoord2f(0, 0); glVertex3f(-size, -size, -size);
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glTexCoord2f(0, 1); glVertex3f(-size, size, -size);
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glTexCoord2f(1, 1); glVertex3f( size, size, -size);
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glTexCoord2f(1, 0); glVertex3f( size, -size, -size);
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glTexCoord2f(0, 0); glVertex3f(-size, -size, size);
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glTexCoord2f(0, 1); glVertex3f(-size, size, size);
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glTexCoord2f(1, 1); glVertex3f( size, size, size);
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glTexCoord2f(1, 0); glVertex3f( size, -size, size);
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glTexCoord2f(0, 0); glVertex3f(-size, -size, -size);
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glTexCoord2f(0, 1); glVertex3f(-size, size, -size);
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glTexCoord2f(1, 1); glVertex3f(-size, size, size);
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glTexCoord2f(1, 0); glVertex3f(-size, -size, size);
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glTexCoord2f(0, 0); glVertex3f(size, -size, -size);
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glTexCoord2f(0, 1); glVertex3f(size, size, -size);
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glTexCoord2f(1, 1); glVertex3f(size, size, size);
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glTexCoord2f(1, 0); glVertex3f(size, -size, size);
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glTexCoord2f(0, 1); glVertex3f(-size, -size, size);
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glTexCoord2f(0, 0); glVertex3f(-size, -size, -size);
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glTexCoord2f(1, 0); glVertex3f( size, -size, -size);
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glTexCoord2f(1, 1); glVertex3f( size, -size, size);
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glTexCoord2f(0, 1); glVertex3f(-size, size, size);
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glTexCoord2f(0, 0); glVertex3f(-size, size, -size);
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glTexCoord2f(1, 0); glVertex3f( size, size, -size);
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glTexCoord2f(1, 1); glVertex3f( size, size, size);
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glEnd();
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// Draw some text on top of our OpenGL object
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window.SaveGLStates();
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sf::Text text("SFML / OpenGL demo");
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text.SetPosition(250.f, 450.f);
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text.SetColor(sf::Color(255, 255, 255, 170));
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window.Draw(text);
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window.RestoreGLStates();
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// Finally, display the rendered frame on screen
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window.Display();
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}
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// Don't forget to destroy our texture
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glDeleteTextures(1, &texture);
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return EXIT_SUCCESS;
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}
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