Method renderTriangle

docs/tests/v2/es6/js/sanddance.js:124958–124972

(i, context)

  }

  renderTriangle(i, context) {
    const buffer = context == null ? context = new _path.default() : undefined;
    const {
      points,
      triangles
    } = this;
    const t0 = triangles[i *= 3] * 2;
    const t1 = triangles[i + 1] * 2;
    const t2 = triangles[i + 2] * 2;
    context.moveTo(points[t0], points[t0 + 1]);
    context.lineTo(points[t1], points[t1 + 1]);
    context.lineTo(points[t2], points[t2 + 1]);
    context.closePath();
    return buffer && buffer.value();
  }

  *trianglePolygons() {
    const {