47 lines
1.2 KiB
Factor
47 lines
1.2 KiB
Factor
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! Copyright (C) 2005, 2007 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays kernel sequences math math.functions hints
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math.order ;
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IN: math.vectors
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: vneg ( u -- v ) [ neg ] map ;
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: v*n ( u n -- v ) [ * ] curry map ;
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: n*v ( n u -- v ) [ * ] with map ;
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: v/n ( u n -- v ) [ / ] curry map ;
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: n/v ( n u -- v ) [ / ] with map ;
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: v+ ( u v -- w ) [ + ] 2map ;
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: v- ( u v -- w ) [ - ] 2map ;
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: [v-] ( u v -- w ) [ [-] ] 2map ;
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: v* ( u v -- w ) [ * ] 2map ;
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: v/ ( u v -- w ) [ / ] 2map ;
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: vmax ( u v -- w ) [ max ] 2map ;
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: vmin ( u v -- w ) [ min ] 2map ;
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: v. ( u v -- x ) 0 [ * + ] 2reduce ;
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: norm-sq ( v -- x ) 0 [ absq + ] reduce ;
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: norm ( v -- x ) norm-sq sqrt ;
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: normalize ( u -- v ) dup norm v/n ;
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: set-axis ( u v axis -- w )
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[ >r zero? 2over ? r> swap nth ] map-index 2nip ;
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HINTS: vneg { array } ;
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HINTS: norm-sq { array } ;
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HINTS: norm { array } ;
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HINTS: normalize { array } ;
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HINTS: n*v { object array } ;
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HINTS: v*n { array object } ;
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HINTS: n/v { array } ;
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HINTS: v/n { array object } ;
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HINTS: v+ { array array } ;
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HINTS: v- { array array } ;
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HINTS: v* { array array } ;
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HINTS: v/ { array array } ;
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HINTS: vmax { array array } ;
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HINTS: vmin { array array } ;
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HINTS: v. { array array } ;
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