B-Spline

components/sections/bsplines/basic-sketch.js

@@ -0,0 +1,30 @@
+module.exports = {
+  degree: 3,
+  activeDistance: 9,
+
+  setup() {
+    this.size(600, 300);
+    this.draw();
+  },
+
+  draw() {
+    this.clear();
+    this.grid(25);
+    var p = this.points[0];
+    this.points.forEach(n => {
+      this.stroke(200);
+      this.line(n.x, n.y, p.x, p.y);
+      p = n;
+      this.stroke(0);
+      this.ellipse(p.x, p.y, 4);
+    });
+    this.drawSplineData();
+  },
+
+  drawSplineData() {
+    if (this.points.length <= this.degree) return;
+    var mapped = this.points.map(p => [p.x, p.y]);
+    this.drawCurve(mapped);
+    this.drawKnots(mapped);
+  }
+};