All files / physics/worker/lib math.js

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export const applyMatrix4ToVector3 = ({ x = 0, y = 0, z = 0 }, matrix = []) => {
    const w = 1 / ( matrix[ 3 ] * x + matrix[ 7 ] * y + matrix[ 11 ] * z + matrix[ 15 ] );
 
    return {
        x: ( matrix[ 0 ] * x + matrix[ 4 ] * y + matrix[ 8 ] * z + matrix[ 12 ] ) * w,
        y: ( matrix[ 1 ] * x + matrix[ 5 ] * y + matrix[ 9 ] * z + matrix[ 13 ] ) * w,
        z: ( matrix[ 2 ] * x + matrix[ 6 ] * y + matrix[ 10 ] * z + matrix[ 14 ] ) * w,
    }
};