How do I make a ray visible?

Troubleshooting General Help
1

Hello I need to make a ray to be visible for debugging. I have try it like this

[java]debugLines=new ArrayList<Geometry>();

for(int i=0;i<rays.size();i++)

{

debugLines.add(new Geometry("line"+i, new Line(rays.get(i).getOrigin(),

rays.get(i).getOrigin().add(rays.get(i).getDirection().normalize().mult(lungime)))));

Material mat=MaterialsBank.UNSHAEDED.clone();

mat.setColor("ColorMap", ColorRGBA.Blue);

debugLines.get(i).setMaterial(mat);

parent.attachChild(debugLines.get(i));

}[/java]

[java]public interface MaterialsBank

{

Material UNSHAEDED=new Material(MyGame.assetManager, "Common/MatDefs/Misc/Unshaded.j3md");

Material LIGHTING=new Material(MyGame.assetManager, "Common/MatDefs/Light/Lighting.j3md");

Material PARTICLE=new Material(MyGame.assetManager, "Common/MatDefs/Misc/Particle.j3md");

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



}[/java]

but i get this exception…

SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]

java.lang.IllegalStateException: No material is set for Geometry: line0

at com.jme3.renderer.RenderManager.renderScene(RenderManager.java:802)

at com.jme3.renderer.RenderManager.renderScene(RenderManager.java:794)

at com.jme3.renderer.RenderManager.renderScene(RenderManager.java:794)

at com.jme3.renderer.RenderManager.renderViewPort(RenderManager.java:1117)

at com.jme3.renderer.RenderManager.render(RenderManager.java:1168)

at com.jme3.app.SimpleApplication.update(SimpleApplication.java:254)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.runLoop(LwjglAbstractDisplay.java:149)

at com.jme3.system.lwjgl.LwjglDisplay.runLoop(LwjglDisplay.java:182)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:223)

at java.lang.Thread.run(Unknown Source)



I think there is something wrong with my material



Thank you.

2

You’re better off managing the geometry and setting it’s material followed by adding it to the list…

3

sorry for the topic. problem solved. i must use ShowNormals.j3md insted of Unshaded.j3md

1 Like
4

The problem didn’t go away, only if you changed the loop. The stack-trace says that no material is set for the specific geometry.