Lines don't glow

Troubleshooting graphics
1

Hey all, I’m having a problem using the bloom filter. When I try to make lines glow, only the closest line to the camera actually gets the effect. Here is a sample program to see the problem. Is there any way around this? I want to use the bloom filter in Objects mode, since I have other stuff that I don’t want the effect applied to.





[java]import com.jme3.app.SimpleApplication;

import com.jme3.material.Material;

import com.jme3.math.ColorRGBA;

import com.jme3.math.Vector3f;

import com.jme3.post.FilterPostProcessor;

import com.jme3.post.filters.BloomFilter;

import com.jme3.scene.Geometry;

import com.jme3.scene.Mesh;

import com.jme3.scene.VertexBuffer;

public class TestGlow extends SimpleApplication {

public static void main(String[] args) {

TestGlow app = new TestGlow();

app.start();

}



@Override

public void simpleInitApp() {

FilterPostProcessor fpp = new FilterPostProcessor(assetManager);

BloomFilter bloom = new BloomFilter();

bloom = new BloomFilter(BloomFilter.GlowMode.Objects);

//bloom.setBlurScale(1f);

bloom.setDownSamplingFactor(4f);

fpp.addFilter(bloom);

viewPort.addProcessor(fpp);



//Mesh glowBox = makeHex(10,10,5);

Mesh glowBox = new Mesh();

glowBox.setMode(Mesh.Mode.Lines);

glowBox.setBuffer(VertexBuffer.Type.Position, 3, new float[]{-10,0,0,10,1,1});

glowBox.updateBound();

glowBox.updateCounts();



Geometry glowGeometry = new Geometry(“box”, glowBox);

glowGeometry.move(0,3,-5);

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

m.setColor(“Color”, ColorRGBA.Blue);

m.setColor(“GlowColor”, ColorRGBA.Red);

glowGeometry.setMaterial(m);

rootNode.attachChild(glowGeometry);



Geometry glowGeometry2 = new Geometry(“box”, glowBox);

glowGeometry2.move(0,-3,-5);

Material m2 = new Material(assetManager, “Common/MatDefs/Misc/Unshaded.j3md”);

m2.setColor(“Color”, ColorRGBA.Blue);

m2.setColor(“GlowColor”, ColorRGBA.Red);

glowGeometry2.setMaterial(m2);

rootNode.attachChild(glowGeometry2);







rootNode.attachChild(glowGeometry2);

cam.setLocation(new Vector3f(6,0,8));

//cam.lookAt(Vector3f.ZERO, Vector3f.UNIT_Y);

}

}[/java]

2

Bloom filter is a post process filter… i.e. it is applied to the end result frame. (At least I think this is correct)



I think you probably want to write a specific shader to accomplish this.

3

Never mind, disregard. I didn’t give them different IDs. If you do it works fine.

4
@pjreddie said:
Never mind, disregard. I didn't give them different IDs. If you do it works fine.


What ID? That doesn't sound right.

Note: in your original code you also add glowGeometry2 twice.
5

Sorry, not IDs, names for the Geometries. If you give them the same name it doesn’t render properly but if you change them to be different it works fine.

6

Mmm… I’d call that a bug, personally. Those names should not be used for something like that, I think.

7

use downsamplingfactor 1, else you need a 4pixel width line to work reliable. (factor one uses 4 times more power on the gpu tho)