随手写了一个粒子特效

有丘直方

RUBY 代码复制

class Particle < Sprite
  BITMAP = Bitmap.new(64, 64)
  64.times do |x|
    64.times do |y|
      if (x - 32) ** 2 + (y - 32) ** 2 <= 128
        BITMAP.set_pixel(x, y, Color.new(255, 0, 0))
      end
    end
  end
  32.times { BITMAP.blur }
 
  VIEWPORT = Viewport.new(-128, -128, 1280, 1024)
 
  @@z = 1 << 30
 
  def initialize(x, y)
    super(VIEWPORT)
    self.bitmap = BITMAP.clone
    self.ox = 8
    self.oy = 8
    self.x = x + 128
    self.y = y + 128
    self.opacity = 0
    self.z = (@@z -= rand(2))
    @frame_count = 0
    @velocity = rand / 2
    @acceleraction = rand / 2000
    @float_y = self.y
    @fade_in_rate = rand(10) + 15
    @fade_out_rate = rand(5) + 5
    @zoom_rate = rand / 400
    @life = rand(50) + 150
    @tone_change_rate = rand / 2 + 0.5
    @float_tone = 0
  end
 
  def update
    @float_y -= (@velocity += @acceleraction)
    self.y = @float_y
    self.opacity += @fade_in_rate if opacity < 255 && @frame_count < @life
    self.opacity -= @fade_out_rate if @frame_count >= @life
    self.zoom_x += @zoom_rate
    self.zoom_y += @zoom_rate
    bitmap.hue_change(3) if @frame_count % 10 == 0
    @float_tone += @tone_change_rate
    tone.red = @float_tone
    tone.green = @float_tone
    tone.blue = @float_tone
    if opacity <= 0
      bitmap.dispose
      dispose
    end
    @frame_count += 1
  end
end
 
class Scene
  def initialize
    Graphics.resize_screen(1024, 768)
    @x = Graphics.width / 2
    @y = Graphics.height / 2
    @particles = []
  end
 
  def set_position(x, y)
    @x, @y = x, y
  end
 
  def update
    update_basic
    update_position
    update_particles
  end
 
  def update_basic
    Mouse.update
    Graphics.update
  end
 
  def update_particles
    @particles.each(&:update)
    @particles.delete_if(&:disposed?)
    360.times do |angle|
      if rand(120) == 0
        radian = angle * Math::PI / 180
        radius = rand(4) + 62
        x = @x + Math.cos(radian) * radius
        y = @y + Math.sin(radian) * radius
        @particles.push(Particle.new(x, y))
      end
    end
  end
 
  def update_position
    set_position(Mouse.x, Mouse.y) if Mouse.press?
  end
end
 
scene = Scene.new
loop { scene.update }

class Particle < Sprite


  BITMAP = Bitmap.new(64, 64)


  64.times do |x|


    64.times do |y|


      if (x - 32) ** 2 + (y - 32) ** 2 <= 128


        BITMAP.set_pixel(x, y, Color.new(255, 0, 0))


      end


    end


  end


  32.times { BITMAP.blur }


 


  VIEWPORT = Viewport.new(-128, -128, 1280, 1024)


 


  @@z = 1 << 30


 


  def initialize(x, y)


    super(VIEWPORT)


    self.bitmap = BITMAP.clone


    self.ox = 8


    self.oy = 8


    self.x = x + 128


    self.y = y + 128


    self.opacity = 0


    self.z = (@@z -= rand(2))


    @frame_count = 0


    @velocity = rand / 2


    @acceleraction = rand / 2000


    @float_y = self.y


    @fade_in_rate = rand(10) + 15


    @fade_out_rate = rand(5) + 5


    @zoom_rate = rand / 400


    @life = rand(50) + 150


    @tone_change_rate = rand / 2 + 0.5


    @float_tone = 0


  end


 


  def update


    @float_y -= (@velocity += @acceleraction)


    self.y = @float_y


    self.opacity += @fade_in_rate if opacity < 255 && @frame_count < @life


    self.opacity -= @fade_out_rate if @frame_count >= @life


    self.zoom_x += @zoom_rate


    self.zoom_y += @zoom_rate


    bitmap.hue_change(3) if @frame_count % 10 == 0


    @float_tone += @tone_change_rate


    tone.red = @float_tone


    tone.green = @float_tone


    tone.blue = @float_tone


    if opacity <= 0


      bitmap.dispose


      dispose


    end


    @frame_count += 1


  end


end


 


class Scene


  def initialize


    Graphics.resize_screen(1024, 768)


    @x = Graphics.width / 2


    @y = Graphics.height / 2


    @particles = []


  end


 


  def set_position(x, y)


    @x, @y = x, y


  end


 


  def update


    update_basic


    update_position


    update_particles


  end


 


  def update_basic


    Mouse.update


    Graphics.update


  end


 


  def update_particles


    @particles.each(&:update)


    @particles.delete_if(&:disposed?)


    360.times do |angle|


      if rand(120) == 0


        radian = angle * Math::PI / 180


        radius = rand(4) + 62


        x = @x + Math.cos(radian) * radius


        y = @y + Math.sin(radian) * radius


        @particles.push(Particle.new(x, y))


      end


    end


  end


 


  def update_position


    set_position(Mouse.x, Mouse.y) if Mouse.press?


  end


end


 


scene = Scene.new


loop { scene.update }

写得太差劲了，看上去没什么感觉
使用RGD

apolinz

谢谢大佬！拿去用顺便膜一下大佬

myownroc

用RGSS实现真的不会卡吗- -