Setting a variable to the amount of red pixels in a texture

Questions & Answers
1

Hi, i am trying to get the number of red pixels within a map texture and then store the amount of them in a variable to use for other things, What would be the best way to do this in c#

thanks

2

You can use Unity - Scripting API: Texture2D.GetPixels

And then check the value of each color. May be a little long though.

public Texture2D texture;

int GetRed()
{
     int _result = 0;
     Color[] _color = texture.GetPixels();
     foreach(Color col in _color){
        if(col == Color.red)_result++;
     }
     return _result;
}

This will return a value for any pixels fully red, you may want to makes it a little more flexible so that it includes color within a range of red like

if(col.r > 0.9 && col.g < 0.1 && col.b < 0.1)_result++;

this is regardless the alpha value.