Position by center point, rather than top-left point

If the element must be absolutely positioned (so, margin: 0 auto; is of no use for centering), and scripting is out of the question, you could achieve this with CSS3 transforms. .centered-block { width: 100px; left: 50%; transform: translate(-50%, 0); position: absolute; } See this fiddle for some examples. The important parts: left: 50%; pushes … Read more

Is it possible to keep the width of the parent element when position: fixed is applied?

This is an interesting challenge. To approach this, we should first understand what fixed actually does. Understand Fixed Unlike absolute, fixed doesn’t position itself from its closest relative parent. Instead, fixed positions itself relative to the viewport. The viewport will always stay fixed, which is why you get the effect that you do. That being … Read more

Css Sibling Absolute Positioning

Absolute positioning is dependent on the “current positioning context”, which may include a parent element (if absolutely or relatively positioned) but will never include a sibling element. Can you reorganize your dom so that you have a parent-child instead of siblings? If so, you could set the parent’s position to relative or absolute and the … Read more

Indoor Positioning System based on Gyroscope and Accelerometer

Gyros and accelerometers are not enough. You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice. Here is an explanation by (Google Tech Talk) at 23:20. I highly recommend this video. As for indoor positioning, I have found these useful: RSSI-Based Indoor Localization and Tracking Using … Read more

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