react-native-redash
Version:
Utility library for React Native Reanimated
2 lines • 26.6 kB
JavaScript
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binomialCoefficients=[[1],[1,1],[1,2,1],[1,3,3,1]];var binomials=function binomials(n,k){return binomialCoefficients[n][k];};var getDerivative=function getDerivative(derivative,t,vs){var n=vs.length-1;var value;var k;if(n===0){return 0;}if(derivative===0){value=0;for(k=0;k<=n;k+=1){value+=binomials(n,k)*(1-Math.pow(t,n)-k)*Math.pow(t,k)*vs[k];}return value;}var vs1=new Array(n);for(k=0;k<n;k+=1){vs1[k]=n*(vs[k+1]-vs[k]);}return getDerivative(derivative-1,t,vs1);};function B(xs,ys,t){var xbase=getDerivative(1,t,xs);var ybase=getDerivative(1,t,ys);var combined=xbase*xbase+ybase*ybase;return Math.sqrt(combined);}var getArcLength=function getArcLength(xs,ys){var t=arguments.length>2&&arguments[2]!==undefined?arguments[2]:1;var n=arguments.length>3&&arguments[3]!==undefined?arguments[3]:20;if(xs.length>=tValues.length){throw new Error("too high n bezier");}var z=t/2;var sum=0;var i;for(i=0;i<n;i+=1){var correctedT=z*tValues[n][i]+z;sum+=cValues[n][i]*B(xs,ys,correctedT);}return z*sum;};var cubicBezierLength=function cubicBezierLength(p0,p1,p2,p3){var xs=[p0.x,p1.x,p2.x,p3.x];var ys=[p0.y,p1.y,p2.y,p3.y];return getArcLength(xs,ys);};export default cubicBezierLength;
//# sourceMappingURL=CubicBezierLength.js.map