79 lines
2.2 KiB
Factor
79 lines
2.2 KiB
Factor
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USING: kernel namespaces make accessors
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math math.constants math.functions math.matrices math.vectors
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sequences splitting grouping self math.trig ;
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IN: ori
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TUPLE: ori val ;
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C: <ori> ori
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: ori> ( -- val ) self> val>> ;
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: >ori ( val -- ) self> (>>val) ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: make-matrix ( quot width -- matrix ) >r { } make r> group ; inline
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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! These rotation matrices are from
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! `Computer Graphics: Principles and Practice'
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: Rz ( angle -- Rx ) deg>rad
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[ dup cos , dup sin neg , 0 ,
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dup sin , dup cos , 0 ,
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0 , 0 , 1 , ] 3 make-matrix nip ;
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: Ry ( angle -- Ry ) deg>rad
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[ dup cos , 0 , dup sin ,
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0 , 1 , 0 ,
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dup sin neg , 0 , dup cos , ] 3 make-matrix nip ;
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: Rx ( angle -- Rz ) deg>rad
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[ 1 , 0 , 0 ,
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0 , dup cos , dup sin neg ,
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0 , dup sin , dup cos , ] 3 make-matrix nip ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: apply-rotation ( rotation -- ) ori> swap m. >ori ;
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: rotate-x ( angle -- ) Rx apply-rotation ;
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: rotate-y ( angle -- ) Ry apply-rotation ;
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: rotate-z ( angle -- ) Rz apply-rotation ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: pitch-up ( angle -- ) neg rotate-x ;
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: pitch-down ( angle -- ) rotate-x ;
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: turn-left ( angle -- ) rotate-y ;
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: turn-right ( angle -- ) neg rotate-y ;
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: roll-left ( angle -- ) neg rotate-z ;
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: roll-right ( angle -- ) rotate-z ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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! roll-until-horizontal
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: V ( -- V ) { 0 1 0 } ;
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: X ( -- 3array ) ori> [ first ] map ;
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: Y ( -- 3array ) ori> [ second ] map ;
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: Z ( -- 3array ) ori> [ third ] map ;
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: set-X ( seq -- ) ori> [ set-first ] 2each ;
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: set-Y ( seq -- ) ori> [ set-second ] 2each ;
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: set-Z ( seq -- ) ori> [ set-third ] 2each ;
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: roll-until-horizontal ( -- )
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V Z cross normalize set-X
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Z X cross normalize set-Y ;
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