Distance

using UnityEngine;

public class Distance: MonoBehaviour {

    Texture2D textureDr;
    Texture2D textureAbravanel;

    void Start() {
        int sizeX = 201;
        int sizeY = 201;

        textureDr = new Texture2D(sizeX, sizeY);
        textureAbravanel = new Texture2D(sizeX, sizeY);

        Vector2 point = new Vector2(100, 100);

        for(int x = 0; x < sizeX; x++) {
            for(int y = 0; y < sizeY; y++) {
                if(IsPointInRangeOfPoint2D(new Vector2(x, y), point, 10F))
                    textureDr.SetPixel(x, y, Color.green);
                else
                    textureDr.SetPixel(x, y, Color.red);

                if(IsPlayerInRangeOfXY(new Vector2(x, y), 10F, point.x, point.y))
                    textureAbravanel.SetPixel(x, y, Color.green);
                else
                    textureAbravanel.SetPixel(x, y, Color.red);
            }
        }

        textureDr.Apply();
        textureAbravanel.Apply();
    }

    bool IsPointInRangeOfPoint2D(Vector2 point1, Vector2 point2, float range) {
        Vector2 newPoint = new Vector2(point1.x - point2.x, point1.y - point2.y);
        float distance = Mathf.Abs(Mathf.Sqrt((newPoint.x * newPoint.x) + (newPoint.y * newPoint.y)));
        if(distance <= range)
            return true;
        return false;
    }

    bool IsPlayerInRangeOfXY(Vector2 point, float radius, float x, float y) {
        float[] velha = new float[2] { point.x, point.y };
        float[] nova = new float[2] {
            (velha[0] - x),
            (velha[1] - y)
        };
        if(((nova[0] < radius) && (nova[1] > -radius)))
            return true;
        return false;
    }

    void OnGUI() {
        GUI.DrawTexture(new Rect(Screen.width * 0.5F - 250, Screen.height * 0.5F - 100, 201, 201), textureDr);
        GUI.DrawTexture(new Rect(Screen.width * 0.5F + 50, Screen.height * 0.5F - 100, 201, 201), textureAbravanel);
    }
}