位图wave效果

RPGzh500223 · 发表于 2022-4-28 18:35:42

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本帖最后由 RPGzh500223 于 2022-4-29 13:11 编辑

直接代码
[pre lang="ruby"]class Bitmap
  def to_int
self.object_id
  end

  # src_bitmap 源位图，必须与自身位图同尺寸
  # wave_length  【无符号整型】波长对应一个Math::PI
  # wave_amp    【无符号整型】波高
  # wave_speed 【基本整型】    影响波动快慢
  # wave_phase 【基本整型】    波动起始的角度值(一般0...360)
  def wave(src_bitmap, wave_length, wave_amp, wave_speed = 1, wave_phase = 0)
@src_bitmap = src_bitmap
@wave_length = wave_length
@wave_amp = wave_amp
@wave_speed = wave_speed
@wave_phase = wave_phase
@waving = (wave_length * wave_amp * wave_speed != 0)

# 说明用变量
@wave_step = Math::PI / wave_length
@wave_dcos = Math.cos(@wave_step) * 2
  end

  # 说明用方法： WaveH 的RGSS 实现
  def wave_update
return unless @waving
self.clear

rad = @wave_phase * Math::A2R
s0 = Math.sin(rad)
s1 = Math.sin(rad + @wave_step)
s2 = 0

src_rect = Rect.new(0, 0, @src_bitmap.width, 1)
self.blt((s0 * @wave_amp).round, 0, @src_bitmap, src_rect)

src_rect.y += 1
self.blt((s1 * @wave_amp).round, 1, @src_bitmap, src_rect)

2.upto(self.height - 1) do |y|
   s2 = @wave_dcos * s1 - s0
   s0, s1 = s1, s2

   src_rect.y += 1
   self.blt((s2 * @wave_amp).round, y, @src_bitmap, src_rect)
end

@wave_phase = (@wave_phase + @wave_speed) % 360
  end


  dll = "Wave.dll"
  WaveH = Win32API.new(dll, 'bitmapWaveH', 'LLLLLL', 'V')
  def wave_update_dllH
return unless @waving
@wave_phase = WaveH.call(self, @src_bitmap, @wave_phase,
   @wave_length, @wave_amp, @wave_speed)
  end

  # 适用于250 * 250大小以下的位图
  WaveV = Win32API.new(dll, 'bitmapWaveV', 'LLLLLL', 'L')
  def wave_update_dllV
return unless @waving
@wave_phase = WaveV.call(self, @src_bitmap, @wave_phase,
   @wave_length, @wave_amp, @wave_speed)
  end

  WaveV_line4 = Win32API.new(dll, 'bitmapWaveV_line4', 'LLLLLL', 'L')
  def wave_update_dllV_line4
return unless @waving
@wave_phase = WaveV_line4.call(self, @src_bitmap, @wave_phase,
   @wave_length, @wave_amp, @wave_speed)
  end

  WaveHV = Win32API.new(dll, 'bitmapWaveHV', 'LLLLLL', 'L')
  def wave_update_dllHV
return unless @waving
@wave_phase = WaveHV.call(self, @src_bitmap, @wave_phase,
   @wave_length, @wave_amp, @wave_speed)
  end
end

src = Bitmap.new("temp2.jpeg")
#src.fill_rect(src.rect, Color.new(0, 255, 255))

sprite = Sprite.new
sprite.bitmap = Bitmap.new(src.width, src.height)
sprite.bitmap.wave(src, 50, 10, 2, 0)
sprite.x = 320
sprite.y = 240
sprite.ox = src.width / 2
sprite.oy = src.height / 2

str = "Bitmap(#{src.width} * #{src.height})\n"
count, t = 0, Time.now
loop do
  sprite.bitmap.wave_update_dllH
  break if Time.now - t >= 1.0
  count += 1
end
str << "Bitmap#wave_update_dllH => #{count} 次/秒\n"

count, t = 0, Time.now
loop do
  sprite.bitmap.wave_update_dllV
  break if Time.now - t >= 1.0
  count += 1
end
str << "Bitmap#wave_update_dllV => #{count} 次/秒\n"

count, t = 0, Time.now
loop do
  sprite.bitmap.wave_update_dllV_line4
  break if Time.now - t >= 1.0
  count += 1
end
str << "Bitmap#wave_update_dllV_line4 => #{count} 次/秒\n"

count, t = 0, Time.now
loop do
  sprite.bitmap.wave_update_dllHV
  break if Time.now - t >= 1.0
  count += 1
end
str << "Bitmap#wave_update_dllHV => #{count} 次/秒\n"

print str

loop do
  Graphics.update
  #sprite.bitmap.wave_update_dllH
  #sprite.bitmap.wave_update_dllV
  #sprite.bitmap.wave_update_dllV_line4
  sprite.bitmap.wave_update_dllHV
end
[/pre]

迭代计算正弦值（百度“快速计算正弦波”)，所以就没考虑周期（实际只能提速一丢丢）
最后还是希望能回复一下测试结果