怎么在任意两个事件之间画一条直线？ - Project1

# 抗锯齿
class Bitmap
  def draw_wu_line(x1, y1, x2, y2, r,g,b,a=255)
    dx = x2 - x1
    dy = y2 - y1
    if dx.abs < dy.abs
      t_ = x1; x1 = y1; y1 = t_
      t_ = x2; x2 = y2; y2 = t_
      t_ = dx; dx = dy; dy = t_
    end
    if x2 < x1
      t_ = x1; x1 = x2; x2 = t_
      t_ = y1; y1 = y2; y2 = t_
    end
    set_pixel(x1, y1, Color.new(r,g,b,a))
    set_pixel(x2, y2, Color.new(r,g,b,a))
    gradient = dy.fdiv(dx)
    intery = y1 + gradient
    for x in (x1 + 1)..(x2 - 1)
      y1 = intery.to_i
      y2 = intery.ceil
      set_pixel(x, y1, Color.new(r,g,b, intery.rfpart * a))
      set_pixel(x, y2, Color.new(r,g,b, intery.fpart * a)) if y1 != y2
      intery = intery + gradient
    end
  end
end

# 抗锯齿


class Bitmap


  def draw_wu_line(x1, y1, x2, y2, r,g,b,a=255)


    dx = x2 - x1


    dy = y2 - y1


    if dx.abs < dy.abs


      t_ = x1; x1 = y1; y1 = t_


      t_ = x2; x2 = y2; y2 = t_


      t_ = dx; dx = dy; dy = t_


    end


    if x2 < x1


      t_ = x1; x1 = x2; x2 = t_


      t_ = y1; y1 = y2; y2 = t_


    end


    set_pixel(x1, y1, Color.new(r,g,b,a))


    set_pixel(x2, y2, Color.new(r,g,b,a))


    gradient = dy.fdiv(dx)


    intery = y1 + gradient


    for x in (x1 + 1)..(x2 - 1)


      y1 = intery.to_i


      y2 = intery.ceil


      set_pixel(x, y1, Color.new(r,g,b, intery.rfpart * a))


      set_pixel(x, y2, Color.new(r,g,b, intery.fpart * a)) if y1 != y2


      intery = intery + gradient


    end


  end


end

class Bitmap
def draw_wu_line(x1, y1, x2, y2, r,g,b,a)
@zhixian = Sprite.new
@zhixian.bitmap = Bitmap.new(544, 416) #两行
dx = x2 - x1
dy = y2 - y1
if dx.abs < dy.abs
t_ = x1; x1 = y1; y1 = t_
t_ = x2; x2 = y2; y2 = t_
t_ = dx; dx = dy; dy = t_
end
if x2 < x1
t_ = x1; x1 = x2; x2 = t_
t_ = y1; y1 = y2; y2 = t_
end
set_pixel(x1, y1, Color.new(r,g,b,a))
set_pixel(x2, y2, Color.new(r,g,b,a))
gradient = dy.fdiv(dx)
intery = y1 + gradient
for x in (x1 + 1)..(x2 - 1)
y1 = intery.to_i
y2 = intery.ceil
set_pixel(x, y1, Color.new(r,g,b, intery.rfpart * a))
set_pixel(x, y2, Color.new(r,g,b, intery.fpart * a)) if y1 != y2
intery = intery + gradient
end
@zhixian.bitmap.draw_wu_line(50,50,255,255 , 255 , 128 , 0 , 255)
#测试常量，想着成功再改为变量……然后一直没成功
loop do
Graphics.update
end
end
end

复制代码

# 抗锯齿
class Bitmap
def draw_wu_line(x1, y1, x2, y2, r,g,b,a=255)
dx = x2 - x1
dy = y2 - y1
if dx.abs < dy.abs
t_ = x1; x1 = y1; y1 = t_
t_ = x2; x2 = y2; y2 = t_
t_ = dx; dx = dy; dy = t_
end
if x2 < x1
t_ = x1; x1 = x2; x2 = t_
t_ = y1; y1 = y2; y2 = t_
end
set_pixel(x1, y1, Color.new(r,g,b,a))
set_pixel(x2, y2, Color.new(r,g,b,a))
gradient = dy.fdiv(dx)
intery = y1 + gradient
for x in (x1 + 1)..(x2 - 1)
y1 = intery.to_i
y2 = intery.ceil
set_pixel(x, y1, Color.new(r,g,b, intery.rfpart * a))
set_pixel(x, y2, Color.new(r,g,b, intery.fpart * a)) if y1 != y2
intery = intery + gradient
end
end
end
class Numeric
def fpart; self - self.to_i end #获取小数部分
def rfpart; 1 - fpart end # 1 - 小数部分
end
#test code:
$t = Sprite.new
bitmap = Bitmap.new(Graphics.width, Graphics.height)
bitmap.draw_wu_line(12,35, 455,321, 255,255,255)
$t.bitmap = bitmap
loop {Graphics.update}

复制代码

3/4 #=> 0
3.fdiv(4) #=> 0.75

复制代码

class << SceneManager
#事件中调用此方法 SceneManager.draw_event_line(event_id1, event_id2)
def draw_event_line(id1, id2)
@scene.draw_event_line(id1, id2) if @scene.is_a?(Scene_Map)
end
end
class Scene_Map
def draw_event_line(id1, id2)
@spriteset.create_event_line(id1, id2)
end
end
#
class Spriteset_Map
alias_method :update_2013920, :update
alias_method :dispose_2013920, :dispose
def update
update_2013920
update_event_line
end
def dispose
dispose_2013920
dispose_event_line
end
#
def create_event_line(id1, id2)
dispose_event_line
es1 = nil
es2 = nil
@character_sprites.each {|s|
next unless s.character.is_a?(Game_Event)
case s.character.id
when id1; es1 = s
when id2; es2 = s
end
}
@event_line = Sprite_EventLine.new(@viewport1, es1, es2)
end
def update_event_line
@event_line.update if @event_line
end
def dispose_event_line
@event_line.dispose if @event_line
end
end
#
class Sprite_EventLine < Sprite
include Math
#参数设定
def line_w; 700 end #最大长度
def line_h; 2 end #宽度
def line_c; Color.new(255, 0, 0) end
#
def initialize(vp, es1, es2)
super(vp)
@es1 = es1
@es2 = es2
self.bitmap = Bitmap.new(line_w, line_h)
self.bitmap.fill_rect(bitmap.rect, line_c)
self.z = 1
update
end
def update
x1 = @es1.x
x2 = @es2.x
y1 = @es1.y
y2 = @es2.y
self.x = x1 #更新x坐标
self.y = y1 - 8 #更新y坐标
self.angle = radian_by(x1, x2, y1, y2) / PI * 180
src_rect.width = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** 0.5
end
def dispose
bitmap.dispose
super
end
def radian_by(x1, x2, y1, y2)
if x1 > x2
if y1 > y2
aatan(x1 - x2, y1 - y2) + PI / 2
elsif y1 < y2
aatan(y2 - y1, x1 - x2) + PI
else
PI
end
elsif x1 < x2
if y1 > y2
aatan(y1 - y2, x2 - x1)
elsif y1 < y2
aatan(x2 - x1, y2 - y1) + PI * 3 / 2
else
0
end
else
if y1 > y2
PI / 2
else
PI * 3 / 2
end
end
end
def aatan(t, s)
atan(t.fdiv(s))
end
end

复制代码