@tokens-studio/graph-engine/dist/nodes/curves/sampleFloatCurve.js

An execution engine to handle Token Studios generators and resolvers

import { FloatCurveSchema, NumberSchema } from '../../schemas/index.js';
import { Node } from '../../programmatic/node.js';
import { arrayOf } from '../../schemas/utils.js';
import { cubicBezier } from './floatCurve.js';
import { setToPrecision } from '../../utils/precision.js';
export default class NodeDefinition extends Node {
    static title = 'Sample Array from Float Curve';
    static type = 'studio.tokens.curve.sampleFloatCurve';
    static description = 'Samples a float curve at given x values';
    constructor(props) {
        super(props);
        this.addInput('curve', {
            type: FloatCurveSchema
        });
        this.addInput('samplePoints', {
            type: arrayOf({
                ...NumberSchema,
                minimum: 0,
                maximum: 1,
                description: 'X values to sample (between 0 and 1)'
            })
        });
        this.addInput('precision', {
            type: {
                ...NumberSchema,
                minimum: 0,
                default: 2
            }
        });
        this.addOutput('values', {
            type: arrayOf(NumberSchema)
        });
    }
    execute() {
        const { curve, samplePoints, precision } = this.getAllInputs();
        const values = [];
        for (const x of samplePoints) {
            const startIndex = curve.segments.findIndex((segment, idx) => {
                const nextSegment = curve.segments[idx + 1];
                return segment[0] <= x && (!nextSegment || x <= nextSegment[0]);
            });
            const p0 = curve.segments[startIndex];
            const p1 = curve.segments[startIndex + 1];
            const [c1, c2] = curve.controlPoints[startIndex];
            const t = (x - p0[0]) / (p1[0] - p0[0]);
            const y = setToPrecision(cubicBezier(p0[1], c1[1], c2[1], p1[1], t), precision);
            values.push(y);
        }
        this.outputs.values.set(values);
    }
}
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