CODEWITHSUNDEEP
libgdxpng
vps11
vps11

Reputation: 43

libGDX renders PNG transparency incorrectly

I've already searched multiple forums but still can't find it. Here is the image: Sample

I have added BlendingAttribute but some (not all) textures still rendered incorrectly. Those pointed faces should be transparent. Here is my snippet:

private void doneLoading() {

    terrain = assets.get("xx.g3db", Model.class);
    terrainInstance = new ModelInstance(terrain);
    for(n = 2; n < terrainInstance.materials.size; n++){
        terrainInstance.materials.get(n).set(new BlendingAttribute(GL30.GL_SRC_ALPHA, GL30.GL_ONE_MINUS_SRC_ALPHA)); // this should working for all faces
    }
    instances.add(terrainInstance);
    loading = false;
}

@Override
public void render() {
    if (loading && assets.update()) {
        doneLoading();
    }
    personcam.update(Gdx.graphics.getDeltaTime());

    Gdx.gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
    Gdx.gl.glTexParameteri(GL30.GL_TEXTURE_2D, GL30.GL_TEXTURE_MAG_FILTER, GL30.GL_NEAREST);
    Gdx.gl.glClearColor(1, 1, 1, 1);
    Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT | GL30.GL_DEPTH_BUFFER_BIT);

    modelBatch.begin(cam);
    modelBatch.render(instances, environment);
    modelBatch.end();

}

I have checked my texture files and they are fine. My FBX file (i'm using SketchUp 8) is fine too. Why are some faces not render transparency correctly? Is this bug?

Upvotes: 1

Views: 268

Answers (1)

vps11
vps11

Reputation: 43

Found by adding a single line:

terrainInstance.materials.get(n).set(new FloatAttribute(FloatAttribute.AlphaTest, 0.8f));

in the for loop fixes the transparency problem.

Upvotes: 1

Related Questions