Tutorial ”HelloSimpleApplication”

Troubleshooting General Help
1

Hey,



I am currently trying to modify some codes from the tutorials to get used with different classes and methods but I have met a problem. Here is my code :

[java]package com.jme3test.hellotest;



import com.jme3.app.SimpleApplication;

import com.jme3.material.Material;

import com.jme3.math.ColorRGBA;

import com.jme3.scene.Geometry;

import com.jme3.scene.shape.Sphere;



public class HelloTest extends SimpleApplication {



public static void main(String[] args) {

HelloTest test = new HelloTest();

test.start();

}



@Override

public void simpleInitApp() {

Sphere sphere = new Sphere(1, 1, 1f);

Geometry geometry = new Geometry(“Sphere”, sphere);

Material material = new Material(assetManager, “Common/MatDefs/Misc/SolidColor.j3md”);

material.setColor(“m_Color”, ColorRGBA.Blue);

geometry.setMaterial(material);

rootNode.attachChild(geometry);

}

}[/java]



This is almost the same code as in the “HelloSimpleApplication” tutorial. The only thing I’have really changed is the spatial shape (I turned a “Quad” into a “Sphere”). This turned out in an error :


SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]
java.nio.BufferOverflowException
at java.nio.Buffer.nextPutIndex(Buffer.java:495)
at java.nio.DirectFloatBufferU.put(DirectFloatBufferU.java:274)
at com.jme3.scene.shape.Sphere.setGeometryData(Sphere.java:271)
at com.jme3.scene.shape.Sphere.updateGeometry(Sphere.java:400)
at com.jme3.scene.shape.Sphere.(Sphere.java:125)
at com.jme3.scene.shape.Sphere.(Sphere.java:107)
at com.jme3test.hellotest.HelloTest.simpleInitApp(HelloTest.java:18)
at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:218)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:138)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:206)
at java.lang.Thread.run(Thread.java:680)
Java Result: 143


What's weird is that the same code works without any error when I put Quads instead of Spheres. Any idea of why I have such an error ?

Edit : Actually I've tried some other shapes and Quad seems to be the only one working though Cylinder do not causes error even if it remains invisible.
2

Erm, your sphere is defined to have 1 vertice pretty much. Try turning those first two 1 values into something like 8 and 16, should do it I think, that may solve your problem.

3

Oh O.K. ! I read the constructor and I must have misunderstood it because I thought the values where for Z coordinate and radius. Whatever now I dont have error anymore but my sphere is invisible… O_o’



Edit : Solved actually… I had a too high value as radius.

4

Your code is running fine for me. You sure it now looks like this?

[java] @Override

public void simpleInitApp() {

Sphere sphere = new Sphere(8, 16, 1f);

Geometry geometry = new Geometry("Sphere", sphere);

Material material = new Material(assetManager, "Common/MatDefs/Misc/SolidColor.j3md");

material.setColor("m_Color", ColorRGBA.Blue);

geometry.setMaterial(material);

rootNode.attachChild(geometry);

}[/java]



Note: 8, 16, 1f

5

I edited my previous post actually to say that I found out what was wrong… :slight_smile:

6

I guessed, that’s why I added the ‘Note’ at teh end :stuck_out_tongue: