血条的制作

void OnGUI()
    {
        if(GUILayout.RepeatButton("加血"))
        {
            if(HP<100)
            {
                HP++;
            }
        }
        if(GUILayout.RepeatButton("减血"))
        {
            if(HP>0)
            {
                HP--;
            }
        }
        int blood_width=blood_Red.width * HP/100;

        GUI.DrawTexture(new Rect(100,100,blood_Black.width,blood_Black.height),blood_Black);
        GUI.DrawTexture(new Rect(100,100,blood_width,blood_Red.height),blood_Red);
    }