34 lines
957 B
Factor
Executable File
34 lines
957 B
Factor
Executable File
! Copyright (C) 2006, 2007 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel accessors math namespaces opengl opengl.gl sequences
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math.vectors ui.gadgets ui.gadgets.grids ui.render math.geometry.rect ;
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IN: ui.gadgets.grid-lines
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TUPLE: grid-lines color ;
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C: <grid-lines> grid-lines
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SYMBOL: grid-dim
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: half-gap grid get gap>> [ 2/ ] map ; inline
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: grid-line-from/to ( orientation point -- from to )
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half-gap v-
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[ half-gap spin set-axis ] 2keep
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grid-dim get spin set-axis ;
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: draw-grid-lines ( gaps orientation -- )
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[ grid get swap grid-positions grid get rect-dim suffix ] dip
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[ [ v- ] curry map ] keep
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[ swap grid-line-from/to gl-line ] curry each ;
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M: grid-lines draw-boundary
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color>> gl-color [
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dup grid set
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dup rect-dim half-gap v- grid-dim set
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compute-grid
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[ { 1 0 } draw-grid-lines ]
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[ { 0 1 } draw-grid-lines ]
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bi*
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] with-scope ;
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