OpenGL2 Can't render points with color

Soo I asked this question already on stackoverflow but gouessej suggested I post this here as well.

I'm currently using OpenGL2 for one of my projects and I want to render a PointCloud. I can also already display the points at the correct positions but I have a problem with the colors. Since I am using WorldWind I cant use shaders to solve the problem and it's hard to post a simple example that you can just copy and paste to see what my code does.

I can post my render method and the different attempts I tried.

Code 1

public void draw(DrawContext drawContext){

        gl.glEnable(GL2.GL_DEPTH_BUFFER_BIT);

        int stride = 0;

        gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);

        gl.glEnableClientState(GL2.GL_COLOR_ARRAY);

        gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO.get(0));

        gl.glVertexPointer(3, GL2.GL_FLOAT, stride, 0);

        gl.glColorPointer(3, GL2.GL_FLOAT, stride,vertBuf.limit()*4);

        gl.glPointSize(4);

        gl.glDrawArrays(GL_POINTS, 0, vertBuf.limit()/3);

        gl.glPointSize(1);

        gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);

        gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);

        gl.glDisableClientState(GL2.GL_COLOR_ARRAY);

        gl.glDisable(GL2.GL_DEPTH_BUFFER_BIT);

    }

    // How the data is put into the VBO

    gl.glBufferData(GL_ARRAY_BUFFER,(vertBuf.limit()*4)+(colorBuffer.limit()*4),null, GL_STATIC_DRAW)
    gl.glBufferSubData(GL_ARRAY_BUFFER, 0, vertBuf.limit()*4, vertBuf);
    gl.glBufferSubData(GL_ARRAY_BUFFER, vertBuf.limit()*4, colorBuffer.limit()*4, colorBuffer);

Code 2

My next attempt was that I tried to render using InterleavedArrays as gouessej said I should try it out.

public void draw(DrawContext drawContext){

        gl.glEnable(GL2.GL_DEPTH_BUFFER_BIT);

        int stride = 0;

        gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);

        gl.glEnableClientState(GL2.GL_COLOR_ARRAY);

        gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBO.get(0));

        gl.glInterleavedArrays(gl.GL_C3F_V3F,0,0);

        InterleavedBuf.rewind();

        gl.glPointSize(4);

        gl.glDrawArrays(GL_POINTS, 0, InterleavedBuf.limit()/6);

        InterleavedBuf.rewind();

        gl.glPointSize(1);

        gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);

        gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);

        gl.glDisableClientState(GL2.GL_COLOR_ARRAY);

        gl.glDisable(GL2.GL_DEPTH_BUFFER_BIT);

    }
       //interleaveArrays Method just interleaves the color and vertex arrays.
       // It looks like this as example : 0.8f , 0.0f, 0.7f, <- colorValues
       //                                            0.75f, 0.3f, 0.4f <- vertexPositions
       // and so on...
       InterleavedBuf = Buffers.newDirectFloatBuffer(interleaveArrays(normalizeColors(colorValues),vertex_positions));

        InterleavedBuf.position(0);

        gl.glBufferData(GL2.GL_ARRAY_BUFFER, InterleavedBuf.limit()*Float.BYTES, InterleavedBuf,GL_STATIC_DRAW);

        InterleavedBuf.position(0);



Both of these attempts yield the same result. I can see the points at the correct position but they are just grey. And yes I also checked my color values and they are not grey :D.
I will try to render my PointCloud with color in a normal GLWindow and not in WorldWind to see if WorldWind may be causing problems later.
 

Ok so I tried out the 2nd Code example in a normal GLCanvas and it has color. So the problem has to be somewhere in WorldWind. I'm gonna post some OpenGL Code later that WorldWind uses maybe someone knows what's wrong ^^. Gonna try out some stuff myself first.

Hmm I couldn't find anything yet and I guess this is quite specific to WorldWind. Sad thing is the WorldWindJava Forum is pretty much dead and I couldn't find any posts related to my problem yet. I guess I have to keep searching for a solution ^^;.

Have you tried to make it work without Worldwind first? Is it what you meant when you wrote about a normal GLCanvas?

Yes, that's what I meant. Sorry if that was unclear ^^. Your code works when I am NOT using WorldWind.

In my humble opinion, you should look for the differences between the plain GLCanvas and Worldwind's equivalent even though it's cumbersome. I'm out of options :(

I found a solution yesterday. I made my own Layer and only implemented the doRender method from the AbstractLayer it extends. Then I removed the begin- & endStandardlighting calls in my render method(In the WorldWind CustomRenderable tutorial it says that you need this) and it works now :). I finally have color :D. Thank you for your help I really appreciate it.

Please can you post some source code so that it's crystal clear for someone else if this problem occurs again?

I assume that you removed the calls to DrawContext.beginStandardLighting() and DrawContext.endStandardLighting().

Yes so as you said i removed these two parts:

        if(!drawContext.isPickingMode()){
            drawContext.beginStandardLighting();          //<---- Evil (｀Д´*)
        }

        if(!drawContext.isPickingMode()){
            drawContext.endStandardLighting();          
        }

And then i also made my own Layer like this:

public class PCloud3DTilesLayer extends AbstractLayer {

    PCloud3DTiles pointCloud;

    PCloud3DTilesLayer(PCloud3DTiles pointCloud){
        this.pointCloud = pointCloud;
    }

    protected void doRender(DrawContext drawContext) {
        if(pointCloud != null){
            pointCloud.render(drawContext);
        }
    }
}

My PCloud3DTiles basically looks kind of like this: https://worldwind.arc.nasa.gov/java/tutorials/build-a-custom-renderable/

Event though you dont need to implement the Renderable Interface anymore if you use your own Layer.
And thats pretty much what fixed it for me :)

Thank you very much, your explanation is valuable and will help other users :)