Question Using Color.Lerp ( bug?)

Hello, I'm currently coding a script that mays change an image color, using color.lerp where t is based on a car speed ( that I report between 0 and 1 using mathematixxxxx ), but the image only goes to b without passing in the steps :

Code (CSharp):

1.  void Update()
2.     {
3.         if (player.speed > 80)
4.         {
5.             currentColor = Color.LerpUnclamped(currentColor, desiredColor, ((player.speed-80)/10));
6.             Debug.Log((player.speed - 80) / 10); // It reports 0 when player speed is 80
7.             // and 1 when it's 90.
8.             graphic.color = currentColor;
9.         }
10.     }

I tried Color.LerpUnclamped and it did the same thing, any idea would be welcome !

Thank you.

 

Is

player.speed

an integer? If so it is doing integer calculations, and 89 / 90 is 0 with integer calculations.

If this is a case, use a floating point constant somewhere in there to cause it to use floating point calculation, like so:

Code (csharp):

1. float fraction = (player.speed - 80.0f) / 10;

And then use

fraction

as the third term to lerp.

Generally you should strive to avoid long hairy lines like line 5 above and instead do lots of small calculations and put them in temporary variables, so you can print them and reason about them.

 

currentColor = Color.Lerp(minSpeedColor, maxSpeedColor, player.speed / maxSpeed));

 

Thanks you for reply, player.speed is already a float, I tried to put my calculation in a variable as you adviced, it doesnt' work but ty for the tip anyway.

 

Thanks you for reply too, but " player.speed / maxSpeed " doesn't give me the numbers i need to.

 

I cheated a little bit by adding another condition with the inverse Color.Lerp, does the work for me but why didn't work is still a question.

Here is the code if someone needs it one day :

Code (CSharp):

1. void Update()
2.     {
3.         if (player.speed > 80)
4.         {
5.             currentColor = Color.Lerp(currentColor, desiredColor, Mathf.PingPong(Time.deltaTime,1));
6.             Debug.Log(fraction);
7.             graphic.color = currentColor;
8.          
9.         }
10.         else if (player.speed < 80)
11.         {
12.             currentColor = Color.Lerp(currentColor, Color.white, Mathf.PingPong(Time.deltaTime, 1));
13.             graphic.color = currentColor;
14.         }
15.     }

 

What numbers do you need ?
Your solution above is not very good.