How to create a digital Speedometer.

Questions & Answers
1

Hey Guys! I was wondering how would i go about scripting a on screen speedometer. atm im using

var mphDisplay : GUIText;

var mph = rigidbody.velocity.magnitude * 2.237;
mphDisplay.text = mph + " MPH";

This works fine. But its not really the way i would like to see it. I would prefer to see it as like a bunch of Colorful bars on the button right of the screen. And when i reach higher speeds the lights will increase as it gets to the top speed it be red. I know this sounds confusing and it is but does anyone know of a tutorial or something that could end in result of having a awesome speedometer. thank you.

2

Good answer provided here: How can I make an on-screen speedometer? - Questions & Answers - Unity Discussions

Prefab: http://forum.unity3d.com/threads/63885-Car-speedometer-dial

Asset store: http://yusufakdag.com/index.php/2011/09/22/speedometer-ui-for-unity3d/

Top 3 links in google for “unity 3d speedometer” in Google :wink: unity 3d speedometer - Google Search

3

If you want something like a led VU, use GUI.DrawTexture to draw the bars proportionally to the speed:

var barTexture: Texture2D; // select some white or gray texture
var barWidth: float = 5;
var barHeight: float = 40;
var barSpace: float = 7;

function OnGUI(){
  // set the speedometer top-left corner
  var pos = Vector2(Screen.width - 90, Screen.height - 50);
  // get the speed in mph:
  var mph = rigidbody.velocity.magnitude * 2.237;
  // draw the bars: each bar means 5 mph, no bar if speed < 1:
  for (var v: float = 1; v <= mph; v += 5){
    // you can set different colors here:
    if (v < 25){ 
      GUI.color = Color.green; // below 25: green
    } else if (v < 45){
      GUI.color = Color.yellow; // 25 and above but below 45: yellow
    } else {
      GUI.color = Color.red; // 45 and above: red
    }
    GUI.DrawTexture(Rect(pos.x, pos.y, barWidth, barHeight), barTexture); // draw a single bar
    pos.x += barSpace; // next bar at barSpace pixels to the right
  }
}

NOTE: If you want to show the speed numerically too, set the format to avoid tons of digits:

  // display the speed with a single decimal digit:
   mphDisplay.text = mph.ToString("F1") + " MPH";