Next Engine release

Ali_RS · December 31, 2022, 6:39am

Hey guys!

Unless someone is planning to do this, I want to manage the v3.6 release. This would be my first time releasing the engine and I hope everything goes smoothly.

I want to thank @sgold for helping me in this process.

You can expect an alpha-1 release soon. I will announce further steps as we progress.

Ali_RS · December 31, 2022, 8:25pm

Created 3.6.0 Milestone on GitHub if you want to take a look

There are 21 open PRs. Some are still not reviewed or are not finished (drafted). You can take a look at them here:

https://github.com/jMonkeyEngine/jmonkeyengine/pulls

I could review one of them and added it to the milestone. The rest of them were outside of my capabilities.

Please let me know if anyone is willing to review any of them so that we can include them in the next release.

capdevon · January 1, 2023, 6:29pm

Happy New Year everyone,
thanks to @Ali_RS, @sgold and the whole community for the new release process that has started!

I was wondering if it is possible to fix this bug on particle effects in the next engine release? It would be very helpful to unlock so many cool effects with stock engine particles.
Thank you all for the support.

github.com/jMonkeyEngine/jmonkeyengine

Bug: Wrong particle position when using 'EmitterMeshVertexShape' or 'EmitterMeshFaceShape' and worldSpace flag equal to true.

opened 04:32PM - 18 Feb 22 UTC

capdevon

Using the shape emitters (`EmitterMeshVertexShape` or `EmitterMeshFaceShape` wit…h `worldSpace` = true), the particles are generated neither from the vertices nor from the faces of the 3d model, but in a position that seems to correspond to the position of the `ParticleEmitter`. The bug could have been introduced with the following [commit 6075e463](https://github.com/jMonkeyEngine/jmonkeyengine/commit/6075e4639d3c15f7ed497db13c5a60aeeb282b82). ![bug](https://user-images.githubusercontent.com/32201701/154723388-9971ae1c-c5c1-468a-836b-18d52dbaabe7.jpg) Here is the test case: ```java package mygame; import java.util.Arrays; import com.jme3.animation.LoopMode; import com.jme3.app.SimpleApplication; import com.jme3.cinematic.MotionPath; import com.jme3.cinematic.events.MotionEvent; import com.jme3.effect.ParticleEmitter; import com.jme3.effect.ParticleMesh.Type; import com.jme3.effect.shapes.EmitterMeshFaceShape; import com.jme3.effect.shapes.EmitterMeshVertexShape; import com.jme3.font.BitmapFont; import com.jme3.font.BitmapText; import com.jme3.input.KeyInput; import com.jme3.input.controls.ActionListener; import com.jme3.input.controls.KeyTrigger; import com.jme3.input.controls.Trigger; import com.jme3.light.AmbientLight; import com.jme3.light.DirectionalLight; import com.jme3.material.Material; import com.jme3.material.Materials; import com.jme3.math.ColorRGBA; import com.jme3.math.FastMath; import com.jme3.math.Vector2f; import com.jme3.math.Vector3f; import com.jme3.post.FilterPostProcessor; import com.jme3.post.filters.BloomFilter; import com.jme3.post.filters.FXAAFilter; import com.jme3.renderer.queue.RenderQueue; import com.jme3.scene.Geometry; import com.jme3.scene.Mesh; import com.jme3.scene.Node; import com.jme3.scene.shape.CenterQuad; import com.jme3.scene.shape.Torus; import com.jme3.shadow.DirectionalLightShadowFilter; import com.jme3.system.AppSettings; import com.jme3.texture.Texture; /** * * @author capdevon */ public class Test_ParticleIssue extends SimpleApplication implements ActionListener { /** * * @param args */ public static void main(String[] args) { Test_ParticleIssue app = new Test_ParticleIssue(); AppSettings settings = new AppSettings(true); settings.setResolution(1280, 720); settings.setRenderer(AppSettings.LWJGL_OPENGL32); app.setSettings(settings); app.setPauseOnLostFocus(false); app.setShowSettings(false); app.start(); } private ParticleEmitter emit; private Node myModel; private BitmapText emitUI; private MotionEvent motionControl; private boolean playing; @Override public void simpleInitApp() { BitmapText hud = createTextUI(ColorRGBA.White, 20, 15); hud.setText("Play/Pause Motion: KEY_SPACE, InWorldSpace: KEY_I"); emitUI = createTextUI(ColorRGBA.Blue, 20, 15 * 2); configCamera(); setupLights(); setupScene(); setupCircle(); createMotionControl(); setupKeys(); } private void setupCircle() { myModel = new Node("FieryCircle"); Geometry torus = createTorus(1f); myModel.attachChild(torus); emit = createParticleEmitter(torus, true); myModel.attachChild(emit); rootNode.attachChild(myModel); } private Geometry createTorus(float radius) { float s = radius / 8f; Geometry geo = new Geometry("CircleXZ", new Torus(64, 4, s, radius)); Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); mat.setColor("Color", ColorRGBA.Blue); mat.getAdditionalRenderState().setWireframe(true); geo.setMaterial(mat); return geo; } /** * emits the particles from the given shape's vertices. It doesn't work. */ private ParticleEmitter createParticleEmitter(Geometry geo, boolean pointSprite) { Type type = pointSprite ? Type.Point : Type.Triangle; ParticleEmitter emitter = new ParticleEmitter("Emitter", type, 1000); Material mat = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md"); mat.setTexture("Texture", assetManager.loadTexture("Effects/Smoke/Smoke.png")); mat.setBoolean("PointSprite", pointSprite); emitter.setMaterial(mat); emitter.setLowLife(1); emitter.setHighLife(1); emitter.setImagesX(15); emitter.setStartSize(0.04f); emitter.setEndSize(0.02f); emitter.setStartColor(ColorRGBA.Orange); emitter.setEndColor(ColorRGBA.Red); emitter.setParticlesPerSec(900); emitter.setGravity(0, 0f, 0); //emitter.getParticleInfluencer().setVelocityVariation(1); //emitter.getParticleInfluencer().setInitialVelocity(new Vector3f(0, .5f, 0)); emitter.setShape(new EmitterMeshVertexShape(Arrays.asList(geo.getMesh()))); //emitter.setShape(new EmitterMeshFaceShape(Arrays.asList(geo.getMesh()))); return emitter; } private void createMotionControl() { float radius = 5f; float height = 1.10f; MotionPath path = new MotionPath(); path.setCycle(true); for (int i = 0; i < 8; i++) { float x = FastMath.sin(FastMath.QUARTER_PI * i) * radius; float z = FastMath.cos(FastMath.QUARTER_PI * i) * radius; path.addWayPoint(new Vector3f(x, height, z)); } //path.enableDebugShape(assetManager, rootNode); motionControl = new MotionEvent(myModel, path); motionControl.setLoopMode(LoopMode.Loop); //motionControl.setInitialDuration(15f); //motionControl.setSpeed(2f); motionControl.setDirectionType(MotionEvent.Direction.Path); } private void setupKeys() { addMapping("ToggleMotionEvent", new KeyTrigger(KeyInput.KEY_SPACE)); addMapping("InWorldSpace", new KeyTrigger(KeyInput.KEY_I)); } private void addMapping(String mappingName, Trigger... triggers) { inputManager.addMapping(mappingName, triggers); inputManager.addListener(this, mappingName); } @Override public void onAction(String name, boolean isPressed, float tpf) { if (name.equals("InWorldSpace") && isPressed) { boolean worldSpace = emit.isInWorldSpace(); emit.setInWorldSpace(!worldSpace); } else if (name.equals("ToggleMotionEvent") && isPressed) { if (playing) { playing = false; motionControl.pause(); } else { playing = true; motionControl.play(); } } } @Override public void simpleUpdate(float tpf) { emitUI.setText("InWorldSpace: " + emit.isInWorldSpace()); } private void configCamera() { flyCam.setDragToRotate(true); flyCam.setMoveSpeed(10); cam.setLocation(new Vector3f(0, 6f, 9.2f)); cam.lookAt(Vector3f.UNIT_Y, Vector3f.UNIT_Y); float aspect = (float) cam.getWidth() / cam.getHeight(); cam.setFrustumPerspective(45, aspect, 0.1f, 1000f); } private void setupScene() { CenterQuad quad = new CenterQuad(12, 12); quad.scaleTextureCoordinates(new Vector2f(2, 2)); Geometry floor = createMesh("Floor", quad); floor.rotate(-FastMath.HALF_PI, 0, 0); rootNode.attachChild(floor); } private Geometry createMesh(String name, Mesh mesh) { Geometry geo = new Geometry(name, mesh); Material mat = new Material(assetManager, Materials.LIGHTING); Texture tex = assetManager.loadTexture("Interface/Logo/Monkey.jpg"); tex.setWrap(Texture.WrapMode.Repeat); mat.setTexture("DiffuseMap", tex); geo.setMaterial(mat); return geo; } private void setupLights() { viewPort.setBackgroundColor(ColorRGBA.DarkGray); rootNode.setShadowMode(RenderQueue.ShadowMode.CastAndReceive); AmbientLight ambient = new AmbientLight(); ambient.setColor(ColorRGBA.White); //rootNode.addLight(ambient); DirectionalLight sun = new DirectionalLight(); sun.setDirection((new Vector3f(-0.5f, -0.5f, -0.5f)).normalizeLocal()); sun.setColor(ColorRGBA.White); rootNode.addLight(sun); DirectionalLightShadowFilter dlsf = new DirectionalLightShadowFilter(assetManager, 4096, 3); dlsf.setLight(sun); dlsf.setShadowIntensity(0.4f); dlsf.setShadowZExtend(256); FXAAFilter fxaa = new FXAAFilter(); BloomFilter bloom = new BloomFilter(BloomFilter.GlowMode.Objects); FilterPostProcessor fpp = new FilterPostProcessor(assetManager); fpp.addFilter(bloom); fpp.addFilter(dlsf); fpp.addFilter(fxaa); viewPort.addProcessor(fpp); } private BitmapText createTextUI(ColorRGBA color, float xPos, float yPos) { BitmapFont font = assetManager.loadFont("Interface/Fonts/Console.fnt"); BitmapText bmp = new BitmapText(font); bmp.setSize(font.getCharSet().getRenderedSize()); bmp.setLocalTranslation(xPos, settings.getHeight() - yPos, 0); bmp.setColor(color); guiNode.attachChild(bmp); return bmp; } } ```

Ali_RS · January 2, 2023, 7:32am

Happy new year everyone!

jMonkeyEngine 3.6.0-alpha1 is now released and available on maven central. You can see the change log here:

I am considering a 3 weeks period for alpha testing then I will freeze the feature set and we will move to beta testing. Please try it out and report it if you find a bug.

Going to take a look at it.

Ali_RS · January 2, 2023, 8:35pm

I submitted a fix

github.com/jMonkeyEngine/jmonkeyengine

Fix #1773 (Wrong particle position when `worldSpace` flag equals to true)

jMonkeyEngine:master ← Ali-RS:fix-issue-1773

opened 08:32PM - 02 Jan 23 UTC

Ali-RS

+315 -1

Fix the wrong particle position when using the `EmitterMeshVertexShape` or `Emit…terMeshFaceShape` and `worldSpace` flag equal to true. The old code was interpolating particles' position toward the emitter world position and this was only working fine for EmitterPointShape but in the other shapes, this was causing particles to not keep the shape because they were being dragged toward the emitter position. The new code calculates the distance vector from the emitter's last location to the current emitter location and subtracts it from the particle's position to generate a hypothetical position that is used for interpolation. Resolves issue #1773

Ali_RS · January 4, 2023, 6:44pm

A new regression report in 3.6 that seems to affect Nifty GUI when the app is in fullscreen. I could not reproduce the issue in my Linux box. Can someone else try to see if they can reproduce this issue?

github.com/jMonkeyEngine/jmonkeyengine

incorrect mouse position for JME 3.6 with Nifty GUI in full-screen LWJGL v3 context

opened 08:02AM - 04 Jan 23 UTC

stephengold

I believe I found a regression in JME 3.6. It occurs when Nifty GUI is running i…n full-screen LWJGL v3 context. Nifty seems to believe the mouse cursor is about 100 pixels above where it appears onscreen. I've observed this phenomenon in several apps. It is particularly noticeable in the `TestIssue1013` app of jme3-examples. Clicking on the "Restart Context" button has no effect. In order to highlight the button, the cursor must be placed about 100 px above the button. Clicking in that area of the GUI will trigger a restart. JME 3.5.2 doesn't have this issue, but I've found it in "master" branch as far back as May 2022. I'm attempting to determine which commit introduced the regression.

xuan · January 5, 2023, 10:03pm

I also couldn’t reproduce it, even after trying many times.

Pavl_G · January 5, 2023, 11:17pm

Wow, that’s amazing ! Very well documented, thank you !
Unfortunately, i am currently preparing for my medical exams, it will start in 3 days and end by January 20, i wonder if the due testing date can be extended to at the end of January at least ? If not, it’s okay i may catch up on Beta.

Ali_RS · January 11, 2023, 7:54pm

I plan to cut the 3.6.0-alpha2 in about 12H.

You can track the issues that are resolved in the below link, there will be a detailed change log added later on soon.

Thanks to all the people who helped with testing and bug fixing

Ali_RS · January 12, 2023, 7:11am

Here we go!

As I promised v3.6.0-alpha2 release is published and available in maven central. Please see the change log for new features and bug fixes.

this release uses the LWJGL v2.9.4 release from our lwjgl2 fork here: GitHub - jMonkeyEngine/lwjgl2: [LEGACY] LWJGL 2.X - The Lightweight Java Game Library. which fixed issues with java 11+ on Linux thanks to @Darkchaos

Also thanks @yaRnMcDonuts and @rickard for their contributions to the new release.

Special thanks to @sgold for all their help

Please test the new release in your JME projects and report if you find an issue.

@capdevon this issue is fixed in the new release. Please try it out and let me know if you had an issue.

Regards

capdevon · January 12, 2023, 8:45am

I will do. thank you

Pesegato · January 12, 2023, 1:26pm

error: cannot find symbol
import com.jme3.app.state.VideoRecorderAppState;
                         ^
  symbol:   class VideoRecorderAppState
  location: package com.jme3.app.state

Why was removed? Any workaround available?

Ali_RS · January 12, 2023, 1:36pm

It is not removed. Still there on the master.

github.com

jMonkeyEngine/jmonkeyengine/blob/master/jme3-desktop/src/main/java/com/jme3/app/state/VideoRecorderAppState.java

/*
 * Copyright (c) 2009-2021 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

This file has been truncated. show original

Do you have the jme3-desktop dependency added?

Pesegato · January 12, 2023, 1:47pm

I only had this:

implementation "org.jmonkeyengine:jme3-lwjgl3:$jmeVersion"

because it was enough with 3.5.2.

Adding the jme3-desktop solved that but now I get:

gen 12, 2023 2:45:20 PM com.jme3.app.LegacyApplication handleError
GRAVE: Uncaught exception thrown in Thread[jME3 Main,5,main]
java.lang.NoSuchMethodError: java.nio.ByteBuffer.clear()Ljava/nio/ByteBuffer;
	at com.jme3.util.BufferUtils.createByteBuffer(BufferUtils.java:996)
	at com.jme3.system.lwjgl.LwjglWindow.imageToGLFWImage(LwjglWindow.java:400)
	at com.jme3.system.lwjgl.LwjglWindow.imagesToGLFWImages(LwjglWindow.java:375)
	at com.jme3.system.lwjgl.LwjglWindow.setWindowIcon(LwjglWindow.java:353)
	at com.jme3.system.lwjgl.LwjglWindow.createContext(LwjglWindow.java:294)
	at com.jme3.system.lwjgl.LwjglWindow.initInThread(LwjglWindow.java:501)
	at com.jme3.system.lwjgl.LwjglWindow.run(LwjglWindow.java:619)
	at com.jme3.system.lwjgl.LwjglWindow.create(LwjglWindow.java:473)
	at com.jme3.app.LegacyApplication.start(LegacyApplication.java:490)
	at com.jme3.app.LegacyApplication.start(LegacyApplication.java:442)
	at com.jme3.app.SimpleApplication.start(SimpleApplication.java:126)

Java 8 btw!

Ali_RS · January 12, 2023, 1:55pm

Oops!!

I thought it has been fixed!!

github.com/jMonkeyEngine/jmonkeyengine

NoSuchMethodError in BufferUtils.createFloatBuffer() with JDK 8

opened 01:18AM - 09 Jan 23 UTC

closed 09:19AM - 10 Jan 23 UTC

stephengold

bug

```console Exception in thread "main" java.lang.NoSuchMethodError: java.nio.Flo…atBuffer.clear()Ljava/nio/FloatBuffer; at com.jme3.util.BufferUtils.createFloatBuffer(BufferUtils.java:871) at mygame.Main.main(Main.java:7) ``` + I can't reproduce this issue in jme3-examples, only in a separate project. + I can't reproduce this issue with JDK 11 or 17, only with JDK 8 . + I can't reproduce this issue with JME 3.5.2, only with JME 3.6.0-alpha1 . Will JME 3.6 support Java 1.8? Here's the test app: ```java package mygame; import com.jme3.util.BufferUtils; public class Main { public static void main(String[] arguments) { BufferUtils.createFloatBuffer(3); } } ```

Please use java 11 or above until we can fix it!

Edit:

If someone has an idea why the above issue happens please help.

Pavl_G · January 12, 2023, 2:18pm

Well, this may happen with non-oracle JDKs, but this should never happen with oracle-jdk-8.

@Pesegato Are you using oracle jdk ? If you aren’t, please check the /jdk-1.8/lib/src.zip file for the java/nio/ByteBuffer class, does it really hold this method ?

Ali_RS · January 12, 2023, 2:27pm

It works fine with JME 3.5. So I believe something is wrong on our side, probably with our GitHub builds.

Please see the details in

github.com/jMonkeyEngine/jmonkeyengine

NoSuchMethodError in BufferUtils.createFloatBuffer() with JDK 8

opened 01:18AM - 09 Jan 23 UTC

closed 09:19AM - 10 Jan 23 UTC

stephengold

bug

```console Exception in thread "main" java.lang.NoSuchMethodError: java.nio.Flo…atBuffer.clear()Ljava/nio/FloatBuffer; at com.jme3.util.BufferUtils.createFloatBuffer(BufferUtils.java:871) at mygame.Main.main(Main.java:7) ``` + I can't reproduce this issue in jme3-examples, only in a separate project. + I can't reproduce this issue with JDK 11 or 17, only with JDK 8 . + I can't reproduce this issue with JME 3.5.2, only with JME 3.6.0-alpha1 . Will JME 3.6 support Java 1.8? Here's the test app: ```java package mygame; import com.jme3.util.BufferUtils; public class Main { public static void main(String[] arguments) { BufferUtils.createFloatBuffer(3); } } ```

pspeed · January 12, 2023, 2:29pm

The thing is, according to the javadoc, even Java8 does not contain this method:

java.nio.ByteBuffer.clear()Ljava/nio/ByteBuffer;

clear():Buffer, yes. clear():ByteBuffer, no.

Edit: JDK18 does have it:

…so somewhere between JDK11 and JDK18, the ByteBuffer.clear():ByteBuffer override was added.

I think the JME release must be being compiled with a newer JDK.

Pesegato · January 12, 2023, 2:33pm

I’ve tried with

oracle jdk 1.8.0.77 (I know, very old)
oracle jdk 1.8.0.91
Zulu 1.8.0.232 (newer)

They all have the same issue. Amazon corretto 11 works.

…And indeed the method doesn’t exist on the src!

Pavl_G · January 12, 2023, 2:34pm

Hmm, that’s one explanation to the issue, there is a conflict between jme compiled byte class files (inside jme jars) and the user JDK compiling the project (the user jdk cannot find the ByteBuffer.clear():ByteBuffer compiled from jme side)