mirror of
https://github.com/SleepingInsomniac/pixelfaucet
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48 lines
1 KiB
Crystal
48 lines
1 KiB
Crystal
require "../src/game"
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require "../src/sprite"
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require "../src/transform2d"
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module PF
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class Affine < Game
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@bricks : Sprite
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@transform : Transform2d = Transform2d.new
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@angle = 0.0
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def initialize(*args, **kwargs)
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super
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@bricks = Sprite.new("./assets/bricks.png")
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@bricks.convert(@screen)
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end
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def update(dt, event)
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@angle += 1.0 * dt
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end
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def draw
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clear(50, 127, 200)
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@transform
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.reset
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.translate(-(@bricks.size // 2))
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.rotate(@angle)
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.translate(viewport // 2)
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b1, b2 = @transform.bounding_box(@bricks.size.x, @bricks.size.y).map(&.to_i)
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@transform.invert
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b1.y.upto(b2.y) do |y|
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b1.x.upto(b2.x) do |x|
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point = @transform.apply(x, y).to_i
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if point >= Vector[0, 0] && point < @bricks.size
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color = @bricks.sample(point.x, point.y)
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draw_point(x.to_i, y.to_i, color)
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end
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end
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end
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end
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end
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end
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game = PF::Affine.new(300, 200, 2)
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game.run!
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