19 lines
479 B
Factor
19 lines
479 B
Factor
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USING: kernel namespaces math.vectors opengl opengl.glu 4DNav.turtle ;
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IN: 4DNav.camera
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: camera-eye ( -- point ) turtle-pos> ;
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: camera-focus ( -- point )
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[ 1 step-turtle turtle-pos> ] save-self ;
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: camera-up ( -- dirvec )
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[ 90 pitch-up turtle-pos> 1 step-turtle turtle-pos> swap v- ]
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save-self ;
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: do-look-at ( camera -- )
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[ >self camera-eye camera-focus camera-up gl-look-at ]
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with-scope ;
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