QuaternionLinearInterpolant.js•789 B
import { Interpolant } from '../Interpolant.js';
import { Quaternion } from '../Quaternion.js';
/**
* Spherical linear unit quaternion interpolant.
*/
class QuaternionLinearInterpolant extends Interpolant {
constructor( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
super( parameterPositions, sampleValues, sampleSize, resultBuffer );
}
interpolate_( i1, t0, t, t1 ) {
const result = this.resultBuffer,
values = this.sampleValues,
stride = this.valueSize,
alpha = ( t - t0 ) / ( t1 - t0 );
let offset = i1 * stride;
for ( let end = offset + stride; offset !== end; offset += 4 ) {
Quaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );
}
return result;
}
}
export { QuaternionLinearInterpolant };