45 lines
846 B
JavaScript
45 lines
846 B
JavaScript
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import { Interpolant } from '../Interpolant.js';
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/**
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* @author tschw
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*/
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function LinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
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Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );
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}
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LinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {
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constructor: LinearInterpolant,
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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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offset1 = i1 * stride,
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offset0 = offset1 - stride,
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weight1 = ( t - t0 ) / ( t1 - t0 ),
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weight0 = 1 - weight1;
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for ( var i = 0; i !== stride; ++ i ) {
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result[ i ] =
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values[ offset0 + i ] * weight0 +
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values[ offset1 + i ] * weight1;
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}
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return result;
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}
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} );
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export { LinearInterpolant };
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