110 lines
2.2 KiB
Ruby
110 lines
2.2 KiB
Ruby
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class Particle
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def initialize(viewport, bitmap)
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@sprite = Sprite.new(viewport)
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@sprite.bitmap = bitmap
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@sprite.ox = bitmap.width / 2
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@sprite.oy = bitmap.height / 2
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self.x = rand(640)
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self.y = rand(480)
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end
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# Link various things to the sprite
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def x
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@x
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end
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def x=(val)
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@x = val
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width = @sprite.bitmap.width * @sprite.zoom_x
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if @x < -width
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@x = 640 + width
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elsif @x > 640 + width
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@x = -width
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end
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@sprite.x = @x
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end
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def y
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@y
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end
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def y=(val)
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@y = val
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height = @sprite.bitmap.height * @sprite.zoom_y
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if @y < -height
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@y = 480 + height
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elsif @y > 480 + height
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@y = -height
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end
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@sprite.y = @y
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end
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def scale
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@sprite.zoom_x
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end
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def scale=(val)
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@sprite.zoom_x = val
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@sprite.zoom_y = val
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end
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def opacity
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@sprite.opacity
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end
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def opacity=(val)
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@sprite.opacity = val
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end
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def dispose
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@sprite.dispose
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@sprite = nil
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end
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end
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class Particle_Firefly < Particle
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@@bitmap = RPG::Cache.picture('firefly')
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def initialize(viewport)
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super(viewport, @@bitmap)
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@phase = rand(120)
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@wavelength = rand(120..240)
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@vx = rand(0.2..1.5) * (rand(2) * 2 - 1)
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@vy = rand(0.2..1.5) * (rand(2) * 2 - 1)
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self.scale = rand(0.02..0.08)
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end
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def update
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self.x += @vx
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self.y += @vy
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self.opacity = Math.sin((@phase / @wavelength.to_f) * Math::PI) * 255
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@phase = (@phase + 1) % @wavelength
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end
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end
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# A layer of moving particle objects, useful for fireflies and shrimp
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class ParticleLayer
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def initialize(viewport, klass, count)
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@particles = Array.new(count)
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count.times do |i|
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@particles[i] = klass.new(viewport)
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end
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@last_map_x = $game_map.display_x / 4
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@last_map_y = $game_map.display_y / 4
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end
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def update
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return unless @particles
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map_x = $game_map.display_x / 4
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map_y = $game_map.display_y / 4
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@particles.each do |p|
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p.x += @last_map_x - map_x
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p.y += @last_map_y - map_y
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p.update
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end
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@last_map_x = map_x
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@last_map_y = map_y
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end
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def dispose
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return unless @particles
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@particles.each do |p|
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p.dispose
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end
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@particles = nil
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end
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end
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