Tweaks
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Caspian Rychlik-Prince
parent
f6456e9a4c
commit
6a52c16dd5
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@ -144,134 +144,129 @@ thing finished on time and under budget!</i></p>
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write a fullscreen Java game using LWJGL. Because we're games programmers, we
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don't want to do a Hello World as we'd probably rather shoot it. But before we
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can make bullets we must pay homage to the <i>rotating square!</i></p>
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<p style="background-color: #FFFFCC; border-style: solid; border-width: 1; padding: 3"><code>public
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<p style="background-color: #FFFFCC; border-style: solid; border-width: 1; padding: 3"><code>import
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org.lwjgl.*;<br>
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import org.lwjgl.opengl.*;<br>
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import org.lwjgl.input.*;<br>
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<br>
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<br>
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public
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final class Game {<br>
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static {<br>
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try {<br>
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DisplayMode[] modes = Display.getAvailableDisplayModes();<br>
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System.out.println("Available display modes:");<br>
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for (int i = 0; i < modes.length; i ++)<br>
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static {<br>
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try {<br>
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DisplayMode[] modes = Display.getAvailableDisplayModes();<br>
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System.out.println("Available display modes:");<br>
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for (int i = 0; i < modes.length; i ++)<br>
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System.out.println(modes[i]);<br>
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// For now let's just pick a mode we're certain to have<br>
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Display.create(new DisplayMode(640, 480, 16, 60), true);<br>
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System.out.println("Created display.");<br>
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} catch (Exception e) {<br>
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System.err.println("Failed to create display due to "+e);<br>
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System.exit(1);<br>
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}<br>
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}<br>
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public static final GL gl = new GL(16, 0, 16, 8);<br>
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static {<br>
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try {<br>
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gl.create();<br>
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System.out.println("Created OpenGL.");<br>
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} catch (Exception e) {<br>
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System.err.println("Failed to create OpenGL due to "+e);<br>
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System.exit(1);<br>
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}<br>
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}<br>
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/** A handy number formatter for use displaying FPS and the like */<br>
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public static NumberFormat fmt = new DecimalFormat();<br>
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static {<br>
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fmt.setMaximumFractionDigits(1);<br>
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fmt.setMinimumFractionDigits(1);<br>
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fmt.setGroupingUsed(false);<br>
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}<br>
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/** Is the game finished? */<br>
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private static boolean finished;<br>
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/** A rotating square! */<br>
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private static float angle;<br>
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/**<br>
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* No construction allowed<br>
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*/<br>
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private Game() {<br>
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}<br>
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public static void main(String[] arguments) {<br>
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try {<br>
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init();<br>
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int frames = 0;<br>
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float fps = 0.0f;<br>
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Timer timer = new Timer();<br>
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timer.reset();<br>
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timer.resume();<br>
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while (!finished) {<br>
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AbsMouse.poll();<br>
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// For now let's just pick a mode we're certain to have<br>
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Display.create(new DisplayMode(640, 480, 16, 60), true);<br>
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System.out.println("Created display.");<br>
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} catch (Exception e) {<br>
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System.err.println("Failed to create display due to "+e);<br>
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System.exit(1);<br>
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}<br>
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}<br>
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<br>
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public static final GL gl = new GL(16, 0, 16, 8);<br>
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static {<br>
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try {<br>
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gl.create();<br>
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System.out.println("Created OpenGL.");<br>
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} catch (Exception e) {<br>
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System.err.println("Failed to create OpenGL due to "+e);<br>
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System.exit(1);<br>
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}<br>
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}<br>
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<br>
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/** Is the game finished? */<br>
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private static boolean finished;<br>
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<br>
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/** A rotating square! */<br>
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private static float angle;<br>
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<br>
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/**<br>
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* No construction allowed<br>
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*/<br>
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private Game() {<br>
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}<br>
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<br>
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public static void main(String[] arguments) {<br>
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try {<br>
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init();<br>
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while (!finished) {<br>
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Keyboard.poll();<br>
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Keyboard.read();<br>
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gl.clear(GL.COLOR_BUFFER_BIT);<br>
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mainLoop();<br>
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render();<br>
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gl.swapBuffers();<br>
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// Count the frames per second. Do with this what you will..<br>
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frames++;<br>
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float time = timer.getTime();<br>
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if (time >= 1.0f) {<br>
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fps = (int) (frames / time);<br>
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timer.reset();<br>
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frames = 0;<br>
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}<br>
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}<br>
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} catch (Throwable t) {<br>
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}</code> <code><br>
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} catch (Throwable t) {<br>
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t.printStackTrace();<br>
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} finally {<br>
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cleanup();<br>
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}<br>
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}<br>
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} finally {<br>
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cleanup();<br>
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}<br>
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}<br>
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<br>
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/**<br>
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* All calculations are done in here<br>
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*/<br>
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private static void mainLoop() {<br>
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angle += 1f;<br>
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if (angle > 360.0f)<br>
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angle = 0.0f;<br>
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/**<br>
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* All calculations are done in here<br>
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*/<br>
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private static void mainLoop() {<br>
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angle += 1f;<br>
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if (angle > 360.0f)<br>
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angle = 0.0f;<br>
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<br>
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if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE))<br>
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finished = true;<br>
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}<br>
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Keyboard.poll();
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<br>
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/**<br>
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* All rendering is done in here<br>
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*/<br>
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private static void render() {<br>
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if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE))<br>
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finished = true;<br>
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}<br>
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<br>
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gl.pushMatrix();<br>
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gl.translatef(Display.getWidth() / 2, Display.getHeight() / 2, 0.0f);<br>
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gl.rotatef(angle, 0, 0, 1.0f);<br>
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gl.begin(GL.QUADS);<br>
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gl.vertex2i(-50, -50);<br>
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gl.vertex2i(50, -50);<br>
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gl.vertex2i(50, 50);<br>
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gl.vertex2i(-50, 50);<br>
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gl.end();<br>
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gl.popMatrix();<br>
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}<br>
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/**<br>
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* Initialize<br>
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*/<br>
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private static void init() throws Exception {<br>
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Keyboard.create();<br>
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Keyboard.enableBuffer();<br>
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Mouse.create();<br>
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// Go into orthographic projection mode.<br>
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gl.matrixMode(GL.PROJECTION);<br>
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gl.loadIdentity();<br>
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gl.glu.ortho2D(0, Display.getWidth(), 0, Display.getHeight());<br>
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gl.matrixMode(GL.MODELVIEW);<br>
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gl.loadIdentity();<br>
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gl.viewport(0, 0, Display.getWidth(), Display.getHeight());<br>
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// Fix the refresh rate to the display frequency.<br>
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gl.wglSwapIntervalEXT(1);<br>
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}<br>
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/**<br>
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* Cleanup<br>
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*/<br>
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private static void cleanup() {<br>
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Keyboard.destroy();<br>
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Mouse.destroy();<br>
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gl.destroy();<br>
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Display.destroy();<br>
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}<br>
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/**<br>
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* All rendering is done in here<br>
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*/<br>
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private static void render() {<br>
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gl.clear(GL.COLOR_BUFFER_BIT);<br>
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gl.pushMatrix();<br>
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gl.translatef(Display.getWidth() / 2, Display.getHeight() / 2, 0.0f);<br>
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gl.rotatef(angle, 0, 0, 1.0f);<br>
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gl.begin(GL.QUADS);<br>
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gl.vertex2i(-50, -50);<br>
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gl.vertex2i(50, -50);<br>
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gl.vertex2i(50, 50);<br>
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gl.vertex2i(-50, 50);<br>
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gl.end();<br>
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gl.popMatrix();<br>
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}<br>
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<br>
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/**<br>
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* Initialize<br>
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*/<br>
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private static void init() throws Exception {<br>
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Keyboard.create();<br>
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// Go into orthographic projection mode.<br>
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gl.matrixMode(GL.PROJECTION);<br>
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gl.loadIdentity();<br>
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glu.ortho2D(0, Display.getWidth(), 0, Display.getHeight());<br>
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gl.matrixMode(GL.MODELVIEW);<br>
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gl.loadIdentity();<br>
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gl.viewport(0, 0, Display.getWidth(), Display.getHeight());<br>
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// Fix the refresh rate to the display frequency.<br>
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gl.wglSwapIntervalEXT(1);<br>
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}<br>
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<br>
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/**<br>
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* Cleanup<br>
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*/<br>
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private static void cleanup() {<br>
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Keyboard.destroy();<br>
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</code> <code>gl.destroy();<br>
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Display.destroy();<br>
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}<br>
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}</code></p>
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</body>
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