28 lines
596 B
Factor
28 lines
596 B
Factor
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USING: kernel arrays sequences math.vectors mortar slot-accessors ;
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IN: geom.pos
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SYMBOL: <pos>
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<pos> { "pos" } accessors define-independent-class
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<pos> {
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"x" !( pos -- x ) [ $pos first ]
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"y" !( pos -- y ) [ $pos second ]
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"set-x" !( pos x -- pos ) [ 0 pick $pos set-nth ]
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"set-y" !( pos y -- pos ) [ 1 pick $pos set-nth ]
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"distance" !( pos pos -- distance ) [ $pos swap $pos v- norm ]
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"move-by" !( pos offset -- pos ) [ over $pos v+ >>pos ]
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"move-by-x" !( pos x-offset -- pos ) [ 0 2array <-- move-by ]
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"move-by-y" !( pos y-offset -- pos ) [ 0 swap 2array <-- move-by ]
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} add-methods |