Updated the Window and OpenGL examples (got rid of GLU and immediate mode)
This commit is contained in:
Laurent Gomila
parent
ebaad339a9
commit
8cb05fc6d0
2 changed files with 169 additions and 109 deletions
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@ -1,4 +1,3 @@
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////////////////////////////////////////////////////////////
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// Headers
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////////////////////////////////////////////////////////////
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@ -14,24 +13,96 @@
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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::Window window(sf::VideoMode(640, 480, 32), "SFML Window", sf::Style::Default, sf::ContextSettings(32));
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// Request a 32-bits depth buffer when creating the window
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sf::ContextSettings contextSettings;
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contextSettings.depthBits = 32;
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// Create a clock for measuring the time elapsed
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sf::Clock clock;
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// Create the main window
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sf::Window window(sf::VideoMode(640, 480), "SFML window with OpenGL", sf::Style::Default, contextSettings);
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// Make it the active window for OpenGL calls
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window.setActive();
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// Set the color and depth clear values
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glClearDepth(1.f);
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glClearColor(0.f, 0.f, 0.f, 0.f);
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glClearColor(0.f, 0.f, 0.f, 1.f);
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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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// Disable lighting and texturing
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glDisable(GL_LIGHTING);
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glDisable(GL_TEXTURE_2D);
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// Configure the viewport (the same size as the window)
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glViewport(0, 0, window.getSize().x, window.getSize().y);
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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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GLfloat ratio = static_cast<float>(window.getSize().x) / window.getSize().y;
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glFrustum(-ratio, ratio, -1.f, 1.f, 1.f, 500.f);
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// Define a 3D cube (8 faces made of 2 triangles composed by 3 vertices)
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GLfloat cube[] =
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{
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// positions // colors (r, g, b, a)
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-50, -50, -50, 0, 0, 1, 1,
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-50, 50, -50, 0, 0, 1, 1,
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-50, -50, 50, 0, 0, 1, 1,
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-50, -50, 50, 0, 0, 1, 1,
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-50, 50, -50, 0, 0, 1, 1,
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-50, 50, 50, 0, 0, 1, 1,
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50, -50, -50, 0, 1, 0, 1,
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50, 50, -50, 0, 1, 0, 1,
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50, -50, 50, 0, 1, 0, 1,
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50, -50, 50, 0, 1, 0, 1,
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50, 50, -50, 0, 1, 0, 1,
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50, 50, 50, 0, 1, 0, 1,
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-50, -50, -50, 1, 0, 0, 1,
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50, -50, -50, 1, 0, 0, 1,
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-50, -50, 50, 1, 0, 0, 1,
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-50, -50, 50, 1, 0, 0, 1,
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50, -50, -50, 1, 0, 0, 1,
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50, -50, 50, 1, 0, 0, 1,
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-50, 50, -50, 0, 1, 1, 1,
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50, 50, -50, 0, 1, 1, 1,
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-50, 50, 50, 0, 1, 1, 1,
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-50, 50, 50, 0, 1, 1, 1,
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50, 50, -50, 0, 1, 1, 1,
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50, 50, 50, 0, 1, 1, 1,
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-50, -50, -50, 1, 0, 1, 1,
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50, -50, -50, 1, 0, 1, 1,
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-50, 50, -50, 1, 0, 1, 1,
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-50, 50, -50, 1, 0, 1, 1,
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50, -50, -50, 1, 0, 1, 1,
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50, 50, -50, 1, 0, 1, 1,
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-50, -50, 50, 1, 1, 0, 1,
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50, -50, 50, 1, 1, 0, 1,
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-50, 50, 50, 1, 1, 0, 1,
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-50, 50, 50, 1, 1, 0, 1,
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50, -50, 50, 1, 1, 0, 1,
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50, 50, 50, 1, 1, 0, 1,
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};
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// Enable position and color vertex components
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_COLOR_ARRAY);
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glVertexPointer(3, GL_FLOAT, 7 * sizeof(GLfloat), cube);
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glColorPointer(4, GL_FLOAT, 7 * sizeof(GLfloat), cube + 3);
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// Disable normal and texture coordinates vertex components
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glDisableClientState(GL_NORMAL_ARRAY);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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// Create a clock for measuring the time elapsed
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sf::Clock clock;
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// Start the game loop
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while (window.isOpen())
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@ -40,28 +111,23 @@ int main()
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sf::Event event;
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while (window.pollEvent(event))
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{
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// Close window : exit
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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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// Escape key: exit
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if ((event.type == sf::Event::KeyPressed) && (event.key.code == sf::Keyboard::Escape))
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window.close();
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// Resize event : adjust viewport
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// Resize event: adjust the viewport
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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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}
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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 color and depth buffer
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// Clear the color and depth buffers
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// Apply some transformations
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// Apply some transformations to rotate the cube
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0.f, 0.f, -200.f);
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@ -69,46 +135,8 @@ int main()
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glRotatef(clock.getElapsedTime().asSeconds() * 30, 0.f, 1.f, 0.f);
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glRotatef(clock.getElapsedTime().asSeconds() * 90, 0.f, 0.f, 1.f);
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// Draw a cube
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glBegin(GL_QUADS);
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glColor3f(1.f, 0.f, 0.f);
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glVertex3f(-50.f, -50.f, -50.f);
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glVertex3f(-50.f, 50.f, -50.f);
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glVertex3f( 50.f, 50.f, -50.f);
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glVertex3f( 50.f, -50.f, -50.f);
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glColor3f(1.f, 0.f, 0.f);
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glVertex3f(-50.f, -50.f, 50.f);
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glVertex3f(-50.f, 50.f, 50.f);
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glVertex3f( 50.f, 50.f, 50.f);
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glVertex3f( 50.f, -50.f, 50.f);
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glColor3f(0.f, 1.f, 0.f);
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glVertex3f(-50.f, -50.f, -50.f);
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glVertex3f(-50.f, 50.f, -50.f);
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glVertex3f(-50.f, 50.f, 50.f);
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glVertex3f(-50.f, -50.f, 50.f);
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glColor3f(0.f, 1.f, 0.f);
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glVertex3f(50.f, -50.f, -50.f);
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glVertex3f(50.f, 50.f, -50.f);
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glVertex3f(50.f, 50.f, 50.f);
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glVertex3f(50.f, -50.f, 50.f);
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glColor3f(0.f, 0.f, 1.f);
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glVertex3f(-50.f, -50.f, 50.f);
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glVertex3f(-50.f, -50.f, -50.f);
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glVertex3f( 50.f, -50.f, -50.f);
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glVertex3f( 50.f, -50.f, 50.f);
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glColor3f(0.f, 0.f, 1.f);
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glVertex3f(-50.f, 50.f, 50.f);
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glVertex3f(-50.f, 50.f, -50.f);
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glVertex3f( 50.f, 50.f, -50.f);
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glVertex3f( 50.f, 50.f, 50.f);
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glEnd();
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// Draw the cube
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glDrawArrays(GL_TRIANGLES, 0, 36);
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// Finally, display the rendered frame on screen
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window.display();
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