@Override
    public void read(JmeImporter im) throws IOException {
        super.read(im);
        InputCapsule ic = im.getCapsule(this);
        trisPerPixel = ic.readFloat("trisPerPixel", 1f);
        distTolerance = ic.readFloat("distTolerance", 1f);
        numLevels = ic.readInt("numLevels", 0);
        numTris = ic.readIntArray("numTris", null);
    }
Sets the triangles per pixel value. The
<code>LodControl</code> will use this value as an error metric to
determine which LOD level to use based on the geometry's area on the
screen.

@param trisPerPixel triangles per pixel
jme3-core/src/main/java/com/jme3/scene/control/LodControl.java