Can't get alpha blending to work properly

[arne]

Err... it really works ?
I haven't got it to work, What did I do wrong I wonder? There's nothing more then adding the Shapes Or does this only work, if I don't use opaque planes?

[hawkwind]

uncertain without seeing your code.  Opaque planes???  What do you mean here??

[arne]

You wanted to see the code. Here is it  (I tried to remove unimportant stuff, because then it would be even more, the code is from my terrain-loader. It splits the terrain in many different pieces).
I marked the areas bold, where I set Transparency Attributes , cause I believe there could lie the problem)

[size=8pt]
             // g is the Geometry
                for(int i = 0; i < texTypeSplit.length; i++) {
                   System.out.println("----------------------------- "+ i);
                    AppearanceResult res = getAppearance(texTypeSplit, x, y, x+SEGMENT_LENGTH, y+SEGMENT_WIDTH);
                    if(res != null) {
                        Shape3D shape = new Shape3D(g,res.getAppearance());
                        og.addChild(shape);
                     }
                 }



    public AppearanceResult getappearance(String type, int start_x, int start_y, int end_x, int end_y) {
     ....
        Texture tiles = texloader.loadTexture(tilePath,"RGB",true,Texture.BASE_LEVEL,Texture.BASE_LEVEL_LINEAR,Texture.WRAP);
        states[0] = new TextureUnitState();
        states[0].setTexture(tiles);
        TextureAttributes texAttrib = new TextureAttributes();
        texAttrib.setTextureMode(TextureAttributes.DECAL);
        states[0].setTextureAttributes(texAttrib);
        if(checkoutBelow) { // For the purely opaque level at the ground, I don't have an alpha layer, so I skip setting the alpha
            Texture alphamap = texloader.getMinMapAlphaTexture(alphaPath);


            states[1] = new TextureUnitState();
            states[1].setTexture(alphamap);
            TextureAttributes alphaAttrib = new TextureAttributes();
            alphaAttrib.setTextureMode(TextureAttributes.MODULATE);
           
            states[1].setTextureAttributes(alphaAttrib);
            TransparencyAttributes transAttr = new TransparencyAttributes(   // These Transparency Attributes are for the Layers,
                    TransparencyAttributes.BLENDED,                                                // that get layed over others, so they are more
                    0f,                                                                                      // transparent in some places than in others.
                    TransparencyAttributes.BLEND_SRC_ALPHA,
                    TransparencyAttributes.BLEND_ONE_MINUS_SRC_ALPHA);
            transAttr.setSortEnabled(true);
            a.setTransparencyAttributes(transAttr);
        }
        else {
            TransparencyAttributes transAttr = new TransparencyAttributes();   // that's for layer at the bottom, which is fully
            transAttr.setSortEnabled(true);                                                                       // opaque
            a.setTransparencyAttributes(transAttr);
        }
        a.setTextureUnitState(states);
        AppearanceResult res = new AppearanceResult(a, checkoutBelow);
        return(res);
    }
[/size]

Note, that it works, if I don't use the DecalGroup, but Transformgroups, that moves the alpha-layers a bit up, so they get shown over the opaque layer.

Arne