78 lines
1.5 KiB
Ruby
78 lines
1.5 KiB
Ruby
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class Vector2
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attr_accessor :x, :y
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def initialize( *args )
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if args.size == 0
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@x = 0
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@y = 0
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elsif args.size == 1
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copyFrom( args[0] )
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elsif args.size == 2
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Vector2.valid? args[0], args[1]
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@x = args[0]
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@y = args[1]
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else
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raise ArgumentError.new( "invalid argument list" )
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end
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@dataType = x.class
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end
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def copyFrom( source )
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unless source.is_a?( Array ) || source.is_a?( Vector2 )
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raise ArgumentError.new( "expected Array or Vector2" )
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end
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Vector2.valid? source[0], source[1]
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@x = source[0]
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@y = source[1]
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end
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def -@
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Vector2.new( -x, -y )
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end
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def +( right )
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Vector2.new( x + right.x, y + right.y )
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end
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def -( right )
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Vector2.new( x - right.x, y - right.y )
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end
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def *( right )
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Vector2.new( x * right.x, y * right.y )
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end
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def /( right )
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Vector2.new( x / right.x, y / right.y )
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end
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def ==( right )
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x == right.x && y == right.y
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end
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def []( index )
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if index == 0 || index == :x
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return x
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elsif index == 1 || index == :y
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return y
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end
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raise ArgumentError.new( "Expected index to be either 0..1 or :x and :y" )
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end
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def self.valid?( x, y )
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if x.class != y.class
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raise RuntimeError.new( "x and y must be of same type" )
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end
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if x.is_a?( Numeric ) == false
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raise RuntimeError.new( "x and y must be numeric!" )
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end
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true
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end
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end
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