functional sketch working (#26)

* functional sketch working

With old sketch block still there

* get all version of lines working with add line and update line

* remove old ui state types

* some clean up

* rename some things

* add todo for multi cursor

* shorten useStore repitition

* small type improvement

* big overhaul to group sketch function and they ast modifying helpers together

* unneeded tweak

* ruthlessly rip out sketch logic

* clean up path keyword

* getting sketch on face working again with all the new sketch line types

* add a bunch of tests and re-arrage file structure

src/lib/utils.ts

@@ -1,7 +1,24 @@
 import { Range } from '../useStore'
 
-export const isOverlapping = (a: Range, b: Range) => {
-  const startingRange = a[0] < b[0] ? a : b
-  const secondRange = a[0] < b[0] ? b : a
-  return startingRange[1] >= secondRange[0]
+export function isOverlap(a: Range, b: Range) {
+  const [startingRange, secondRange] = a[0] < b[0] ? [a, b] : [b, a]
+  const [lastOfFirst, firstOfSecond] = [startingRange[1], secondRange[0]]
+  return lastOfFirst >= firstOfSecond
+}
+
+export function roundOff(num: number, places: number = 2): number {
+  const x = Math.pow(10, places)
+  return Math.round(num * x) / x
+}
+
+export function getLength(a: [number, number], b: [number, number]): number {
+  const x = b[0] - a[0]
+  const y = b[1] - a[1]
+  return Math.sqrt(x * x + y * y)
+}
+
+export function getAngle(a: [number, number], b: [number, number]): number {
+  const x = b[0] - a[0]
+  const y = b[1] - a[1]
+  return ((Math.atan2(y, x) * 180) / Math.PI + 360) % 360
 }