better localization

lib/custom-element/api/graphics-api.js

@@ -236,7 +236,7 @@ class GraphicsAPI extends BaseAPI {
    * Add a plain point to the current shape
    */
   vertex(x, y) {
-    this.currentShape.vertex({ x, y});
+    this.currentShape.vertex({ x, y });
   }
 
   /**
@@ -244,7 +244,7 @@ class GraphicsAPI extends BaseAPI {
    */
   end() {
     this.ctx.beginPath();
-    let {x, y} = this.currentShape.first;
+    let { x, y } = this.currentShape.first;
     this.ctx.moveTo(x, y);
     this.currentShape.segments.forEach((s) =>
       this[`draw${s.type}`](this.ctx, s.points, s.factor)
@@ -279,6 +279,58 @@ class GraphicsAPI extends BaseAPI {
       this.line({ x: 0, y }, { x: this.width, y });
     }
   }
+
+  /**
+   * math functions
+   */
+  floor(v) {
+    return Math.floor(v);
+  }
+
+  ceil(v) {
+    return Math.ceil(v);
+  }
+
+  round(v) {
+    return Math.round(v);
+  }
+
+  abs(v) {
+    return Math.abs(v);
+  }
+
+  sin(v) {
+    return Math.sin(v);
+  }
+
+  cos(v) {
+    return Math.cos(v);
+  }
+
+  tan(v) {
+    return Math.tan(v);
+  }
+
+  sqrt(v) {
+    return Math.sqrt(v);
+  }
+
+  atan2(dy, dx) {
+    return Math.atan2(dy, dx);
+  }
+
+  pow(v, p) {
+    return Math.pow(v, p);
+  }
+
+  map(v, s, e, ns, ne, constrain = false) {
+    const i1 = e - s,
+      i2 = ne - ns,
+      p = v - s;
+    let r = ns + (p * i2) / i1;
+    if (constrain) r = r < ns ? ns : r > ne ? ne : r;
+    return r;
+  }
 }
 
 export { GraphicsAPI, Bezier, Vector };