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import { Interpolant } from '../Interpolant.js';
import { Quaternion } from '../Quaternion.js';
/**
* Spherical linear unit quaternion interpolant.
*
* @author tschw
*/
function QuaternionLinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );
}
QuaternionLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {
constructor: QuaternionLinearInterpolant,
interpolate_: function ( i1, t0, t, t1 ) {
var result = this.resultBuffer,
values = this.sampleValues,
stride = this.valueSize,
offset = i1 * stride,
alpha = ( t - t0 ) / ( t1 - t0 );
for ( var end = offset + stride; offset !== end; offset += 4 ) {
Quaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );
}
return result;
}
} );
export { QuaternionLinearInterpolant };
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