Nifty 1.4 LWJGL example (without Maven)
I'm using Eclipse. I've downloaded the nifty-1.4.0-complete.zip from sf.net. Starting from 06.08.2014 this zip will contain a dependencies folder with three additional external libs that Nifty will need:
- eventbus-1.4.jar
- jglfont-core-1.4.jar
- xpp3-1.1.4c.jar
Since this example uses LWJGL you'll need to download LWJGL 2.9.1 from http://lwjgl.org/download.php
So, that's all we need!
I've put the libs into a lib folder inside of my Java project in Eclipse. For me it looks like that:
I've added these libs to my build classpath which looks like that:
For good measure here is my .classpath file:
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.launching.macosx.MacOSXType/jdk1.7.0_45"/>
<classpathentry kind="lib" path="libs/lwjgl/jar/jinput.jar"/>
<classpathentry kind="lib" path="libs/lwjgl/jar/lwjgl.jar"/>
<classpathentry kind="lib" path="libs/nifty/nifty-1.4.0.jar"/>
<classpathentry kind="lib" path="libs/nifty/nifty-default-controls-1.4.0.jar"/>
<classpathentry kind="lib" path="libs/nifty/nifty-lwjgl-renderer-1.4.0.jar"/>
<classpathentry kind="lib" path="libs/nifty/nifty-style-black-1.4.0.jar"/>
<classpathentry kind="lib" path="libs/lwjgl/jar/lwjgl_util.jar"/>
<classpathentry kind="lib" path="libs/nifty/dependencies/eventbus-1.4.jar"/>
<classpathentry kind="lib" path="libs/nifty/dependencies/jglfont-core-1.4.jar"/>
<classpathentry kind="lib" path="libs/nifty/dependencies/xpp3-1.1.4c.jar"/>
<classpathentry kind="output" path="bin"/>
</classpath>
And finally here is a somewhat minimal all in one demo class that will setup LWJGL, the inputsystem and init Nifty for core profile batched renderer and shows a simple screen and then quits when a button is pressed. The result will look like that:
And finally the Java code:
import static org.lwjgl.opengl.GL11.glBlendFunc;
import static org.lwjgl.opengl.GL11.glClear;
import static org.lwjgl.opengl.GL11.glClearColor;
import static org.lwjgl.opengl.GL11.glEnable;
import static org.lwjgl.opengl.GL11.glViewport;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import org.lwjgl.opengl.ContextAttribs;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.PixelFormat;
import org.lwjgl.util.glu.GLU;
import de.lessvoid.nifty.Nifty;
import de.lessvoid.nifty.NiftyEventSubscriber;
import de.lessvoid.nifty.builder.EffectBuilder;
import de.lessvoid.nifty.builder.LayerBuilder;
import de.lessvoid.nifty.builder.PanelBuilder;
import de.lessvoid.nifty.builder.ScreenBuilder;
import de.lessvoid.nifty.builder.TextBuilder;
import de.lessvoid.nifty.controls.ButtonClickedEvent;
import de.lessvoid.nifty.controls.button.builder.ButtonBuilder;
import de.lessvoid.nifty.nulldevice.NullSoundDevice;
import de.lessvoid.nifty.render.batch.BatchRenderDevice;
import de.lessvoid.nifty.renderer.lwjgl.input.LwjglInputSystem;
import de.lessvoid.nifty.renderer.lwjgl.render.LwjglBatchRenderBackendCoreProfileFactory;
import de.lessvoid.nifty.screen.DefaultScreenController;
import de.lessvoid.nifty.screen.Screen;
import de.lessvoid.nifty.screen.ScreenController;
import de.lessvoid.nifty.spi.time.impl.AccurateTimeProvider;
import de.lessvoid.nifty.tools.Color;
import de.lessvoid.nifty.tools.SizeValue;
public class LwjglCoreProfileMain {
private static final int WIDTH = 1024;
private static final int HEIGHT = 768;
public static void main(final String[] args) throws Exception {
initLWJGL();
initGL();
LwjglInputSystem inputSystem = initInput();
Nifty nifty = initNifty(inputSystem);
nifty.loadStyleFile("nifty-default-styles.xml");
nifty.loadControlFile("nifty-default-controls.xml");
createIntroScreen(nifty, new MyScreenController());
nifty.gotoScreen("start");
renderLoop(nifty);
shutDown(inputSystem);
}
private static LwjglInputSystem initInput() throws Exception {
LwjglInputSystem inputSystem = new LwjglInputSystem();
inputSystem.startup();
return inputSystem;
}
private static void initLWJGL() throws Exception {
DisplayMode currentMode = Display.getDisplayMode();
DisplayMode[] modes = Display.getAvailableDisplayModes();
List<DisplayMode> matching = new ArrayList<DisplayMode>();
for (int i=0; i<modes.length; i++) {
DisplayMode mode = modes[i];
if (mode.getWidth() == WIDTH &&
mode.getHeight() == HEIGHT &&
mode.getBitsPerPixel() == 32 ) {
matching.add(mode);
}
}
DisplayMode[] matchingModes = matching.toArray(new DisplayMode[0]);
boolean found = false;
for (int i=0; i<matchingModes.length; i++) {
if (matchingModes[i].getFrequency() == currentMode.getFrequency()) {
Display.setDisplayMode(matchingModes[i]);
found = true;
break;
}
}
if (!found) {
Arrays.sort(matchingModes, new Comparator < DisplayMode >() {
public int compare(final DisplayMode o1, final DisplayMode o2) {
if (o1.getFrequency() > o2.getFrequency()) {
return 1;
} else if (o1.getFrequency() < o2.getFrequency()) {
return -1;
} else {
return 0;
}
}
});
for (int i=0; i<matchingModes.length; i++) {
Display.setDisplayMode(matchingModes[i]);
break;
}
}
int x = (currentMode.getWidth() - Display.getDisplayMode().getWidth()) / 2;
int y = (currentMode.getHeight() - Display.getDisplayMode().getHeight()) / 2;
Display.setLocation(x, y);
Display.setFullscreen(false);
Display.create(new PixelFormat(), new ContextAttribs(3, 2).withProfileCore(true));
Display.setVSyncEnabled(false);
Display.setTitle("Hello Nifty");
}
private static void initGL() {
glViewport(0, 0, Display.getDisplayMode().getWidth(), Display.getDisplayMode().getHeight());
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL11.GL_COLOR_BUFFER_BIT);
glEnable(GL11.GL_BLEND);
glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
}
private static Nifty initNifty(final LwjglInputSystem inputSystem) throws Exception {
return new Nifty(
new BatchRenderDevice(LwjglBatchRenderBackendCoreProfileFactory.create()),
new NullSoundDevice(),
inputSystem,
new AccurateTimeProvider());
}
private static Screen createIntroScreen(final Nifty nifty, final ScreenController controller) {
return new ScreenBuilder("start") {{
controller(controller);
layer(new LayerBuilder("layer") {{
childLayoutCenter();
onStartScreenEffect(new EffectBuilder("fade") {{
length(500);
effectParameter("start", "#0");
effectParameter("end", "#f");
}});
onEndScreenEffect(new EffectBuilder("fade") {{
length(500);
effectParameter("start", "#f");
effectParameter("end", "#0");
}});
onActiveEffect(new EffectBuilder("gradient") {{
effectValue("offset", "0%", "color", "#333f");
effectValue("offset", "100%", "color", "#ffff");
}});
panel(new PanelBuilder() {{
childLayoutVertical();
text(new TextBuilder() {{
text("Nifty 1.4 Core Hello World");
style("base-font");
color(Color.BLACK);
alignCenter();
valignCenter();
}});
panel(new PanelBuilder(){{
height(SizeValue.px(10));
}});
control(new ButtonBuilder("exit", "Pretty Cool!") {{
alignCenter();
valignCenter();
}});
}});
}});
}}.build(nifty);
}
private static void renderLoop(final Nifty nifty) {
boolean done = false;
while (!Display.isCloseRequested() && !done) {
Display.update();
if (nifty.update()) {
done = true;
}
nifty.render(true);
int error = GL11.glGetError();
if (error != GL11.GL_NO_ERROR) {
String glerrmsg = GLU.gluErrorString(error);
System.err.println(glerrmsg);
}
}
}
private static void shutDown(final LwjglInputSystem inputSystem) {
inputSystem.shutdown();
Display.destroy();
System.exit(0);
}
public static class MyScreenController extends DefaultScreenController {
@NiftyEventSubscriber(id="exit")
public void exit(final String id, final ButtonClickedEvent event) {
nifty.exit();
}
}
}