ratio gives NaN result #33
Description
The ratio setting https://github.com/webarkit/ARnft/blob/fd16f66908451c95174dacb4ee36c90c344304ff/examples/arNFT_example.html#L37 gives NaN. In some circumstances is very bad see for example this comment kalwalt/kalwalt-interactivity-AR#46 (comment) PR kalwalt/kalwalt-interactivity-AR#46 where the wrong setting and data may give unpredictable results. This should be fixed in all examples.