CODEWITHSUNDEEP
c#unity-game-engine
George Bland
George Bland

Reputation: 39

I want to add some variation to the colours of my sprites in unity

I tried to add some variation to the colour of each sprite using the following code:

spriterenderer.color = colour+ new Color32(Convert.ToByte(rnd.Next(-10,10)), Convert.ToByte(rnd.Next(-10, 10)), Convert.ToByte(rnd.Next(-10, 10)),255);

This did not work, what way should I do this?

Upvotes: 0

Views: 155

Answers (1)

derHugo
derHugo

Reputation: 90580

Color32 always has components that are clamped to 0 - 255. You will never get negative values anyway.

Additionally you are using Convert.ToByte. A byte itself already can not be negative either and for negative values you will get a

System.OverflowException: Value was either too large or too small for an unsigned byte.

You should rather go component wise and do something like e.g.

// Implicit conversion Color -> Color32
Color32 temp = colour;

// This makes sure the value never goes under 0 or beyond 255
temp.r = (byte) Mathf.Clamp(temp.r + UnityEngine.Random.Range(-10, 11), byte.MinValue, byte.MaxValue);
temp.g = (byte) Mathf.Clamp(temp.g + UnityEngine.Random.Range(-10, 11), byte.MinValue, byte.MaxValue);
temp.b = (byte) Mathf.Clamp(temp.b + UnityEngine.Random.Range(-10, 11), byte.MinValue, byte.MaxValue);

spriterenderer.color = temp;

Upvotes: 1

Related Questions