Gradient Ruby Bars .03

class Game_Actor < Game_Battler

    def needed_exp(current_level)
    return @exp_list[current_level + 1] - @exp_list[current_level]
  end

  def gained_exp(current_exp, current_level)
    return current_exp - @exp_list[current_level]
  end

end

class Bitmap

    def draw_gradient_rect(x, y, width, height, color1, color2)
        for i in 0..width #can replace width with limit
            mul = (width - i).to_f / width #can replace width with limit
            color = Color.new(
                mul * (color2.red - color1.red) + color1.red,
                mul * (color2.green - color1.green) + color1.green,
                mul * (color2.blue - color1.blue) + color1.blue
            )
            self.fill_rect(x + i, y, 1, height, color)
        end
    end
end


class Window_Base < Window


    def bar_color(n)
        case n
            when 0
                return Color.new(0, 0, 0)  # black
            when 1
                return Color.new(0, 255, 0)  # green
            when 2
                return Color.new(0, 0, 255)  # blue
            when 3
                return Color.new(255, 0, 0)  # red
            when 4
                return Color.new(255, 255, 255)  # white
            when 5
                return Color.new(230, 230, 230)  # offwhite
            when 6
                return Color.new(50, 0, 0)  # barely red
            when 7
                return Color.new(0, 50, 0)  # barely green
            when 8
            return Color.new(0, 0, 50)  # barely blue
        end
    end


    def draw_hp_bar(actor, x, y, w = 100)
        hp = actor.hp
        max_hp = actor.maxhp
        border_color = bar_color(0)
        health_color1 = bar_color(1)
        health_color2 = bar_color(7)
        hp_percentage = hp * 1.0 / max_hp
        health_fill = w * hp_percentage
        border = Rect.new(x - 1, y, w + 2, 10)
        self.contents.fill_rect(border, border_color)
        if hp > 0
            health = self.contents.draw_gradient_rect(x, y + 1, health_fill, 8, health_color1, health_color2)
        else
            health = Rect.new(x, y, w, 8)
            self.contents.fill_rect(health, border_color)
        end
    end

    def draw_xp_bar(actor, x, y, w = 100)
        exp = actor.exp
        level = actor.level
        gained_exp = actor.gained_exp(exp, level)
        needed_exp = actor.needed_exp(level)
        exp_percentage = (gained_exp * 1.0 / needed_exp) * w
        background_color = bar_color(0)
        first_bar_color = bar_color(4)
        second_bar_color = bar_color(5)
        background_bar = Rect.new(x - 1, y, w + 2, 10)
        first_bar = Rect.new(x, y + 1, exp_percentage, 8)
        second_bar = Rect.new(x, y + 3, exp_percentage, 4)
        self.contents.fill_rect(background_bar, background_color)
        self.contents.fill_rect(first_bar, first_bar_color)
        self.contents.fill_rect(second_bar, second_bar_color)
    end
end