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POLWJGL - Black screen
 

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    <p>For some reason, when I try to run this code, all I get is a black screen. How can I actually get it to display what I want it to display?</p> <p>I'm using Eclipse and I have added lwjgl.jar and lwjgl_utils.jar into the build path.</p> <pre><code>import org.lwjgl.opengl.Display; import org.lwjgl.opengl.DisplayMode; import org.lwjgl.opengl.GL11; import org.lwjgl.util.glu.GLU; import org.lwjgl.input.Keyboard; public class game { private boolean done = false; private boolean fullscreen = false; private final String windowTitle = "Lesson 1"; private boolean f1 = false; private DisplayMode displayMode; /** * Everything starts and ends here. Takes 1 optional command line argument. * If fullscreen is specified on the command line then fullscreen is used, * otherwise windowed mode will be used. * @param args command line arguments */ public static void main(String args[]) { boolean fullscreen = false; if (args.length &gt; 0) { if (args[0].equalsIgnoreCase("fullscreen")) { fullscreen = true; } } game gamez = new game(); gamez.run(fullscreen); } /** * Launch point * @param fullscreen boolean value, set to true to run in fullscreen mode */ public void run(boolean fullscreen) { this.fullscreen = fullscreen; try { init(); while (!done) { mainloop(); render(); Display.update(); } cleanup(); } catch (Exception e) { e.printStackTrace(); System.exit(0); } } /** * All updating is done here. Key and mouse polling as well as window closing and * custom updates, such as AI. */ private void mainloop() { if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) done = true; if (Display.isCloseRequested()) done = true; if (Keyboard.isKeyDown(Keyboard.KEY_F1)) { f1 = true; switchmode(); } if (!Keyboard.isKeyDown(Keyboard.KEY_F1)) f1 = false; } private void switchmode() { fullscreen = !fullscreen; try { Display.setFullscreen(fullscreen); } catch (Exception e) { e.printStackTrace(); } } /** * For rendering all objects to the screen * @return boolean for success or not */ private void render() { GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT); GL11.glLoadIdentity(); GL11.glTranslatef(-1.5f, 0.0f, -6.0f); GL11.glBegin(GL11.GL_TRIANGLES); GL11.glVertex3f(0.0f, 1.0f, 0.0f); GL11.glVertex3f(-1.0f, -1.0f, 0.0f); GL11.glVertex3f(1.0f, -1.0f, 0.0f); GL11.glEnd(); GL11.glTranslatef(3.0f, 0.0f, 0.0f); GL11.glBegin(GL11.GL_QUADS); GL11.glVertex3f(-1.0f, 1.0f, 0.0f); GL11.glVertex3f(1.0f, 1.0f, 0.0f); GL11.glVertex3f(1.0f, -1.0f, 0.0f); GL11.glVertex3f(-1.0f, -1.0f, 0.0f); GL11.glEnd(); } /** * Create a window depending on whether fullscreen is selected * @throws Exception Throws the window.create() exception up the stack. */ private void createWindow() throws Exception { Display.setFullscreen(fullscreen); DisplayMode d[] = Display.getAvailableDisplayModes(); for (int i = 0; i &lt; d.length; i++) { if (d[i].getWidth() == 640 &amp;&amp; d[i].getHeight() == 480 &amp;&amp; d[i].getBitsPerPixel() == 32) { displayMode = d[i]; break; } } Display.setDisplayMode(displayMode); Display.setTitle(windowTitle); Display.create(); } /** * Do all initilization code here. Including Keyboard and OpenGL * @throws Exception Passes any exceptions up to the main loop to be handled */ private void init() throws Exception { createWindow(); initGL(); } /** * Initialize OpenGL * */ private void initGL() { GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glShadeModel(GL11.GL_SMOOTH); GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); GL11.glClearDepth(1.0); GL11.glEnable(GL11.GL_DEPTH_TEST); GL11.glDepthFunc(GL11.GL_EQUAL); GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glLoadIdentity(); // calculate the apsect ratio of the window GLU.gluPerspective(45.0f, (float)displayMode.getWidth() / (float)displayMode.getHeight(), 0.1f, 100.0f); GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); } /** * Cleanup all the resources * */ private void cleanup() { Display.destroy(); } } </code></pre>
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    1. COdid you try changing the clear colour? From what I suspect you are not mapping the texture on to the geometry correctly, which will then display as black. Since your clear colour is black too, you don't see anything.
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      1. POLWJGL - Black screen
      1. USBartvbl
 

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