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import vec2 from require 'cpml'
=>
-- draw helper lines
origin = vec2 200, 600
draw.line origin, vec2 200, 0
draw.line origin, vec2 1000, 600
-- input two points
input.line @l, { x: 200 }, { y: 600 }
-- restrict to first quadrant
if @l!.frm.y > 600
@l!.frm.y = 600
if @l!.to.x < 200
@l!.to.x = 200
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