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