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Formula to convert After Effects to Three.js camera focal length
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| /* aeFocalLength must be in millimeters */ | |
| var getThreeFocalLength = function(viewportWidth, viewportHeight, aeFocalLength, filmWidth, filmHeight) { | |
| if ( filmWidth === undefined ) filmWidth = 36; | |
| if ( filmHeight === undefined ) filmHeight = 24; | |
| return (filmHeight*(viewportWidth / (filmWidth/aeFocalLength)))/viewportHeight; | |
| } |
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