order sanity checks

src/components/chart/RungBuilder.vue

@@ -102,7 +102,6 @@ watchEffect(()=>{
 })
 
 function setEndpoints(a, b) {
-  // console.log('rb setting endpoints', devectorize(a), devectorize(b))
   endpoints.value = [devectorize(a), devectorize(b)]
 }
 
@@ -125,8 +124,7 @@ const rungs = computed({
     r = Number(r)
     const prevR = Number(props.builder.rungs)
     props.builder.rungs = r
-    // console.log('set rungs', prevR, r, a, b)
-    if ( r > 0 && vectorIsNull(b) ) {
+    if ( prevR === 1 && r > 1 ) {
       // convert single shape to a range
       if (props.mode===0) {
         const width = vectorize(props.stdWidth)
@@ -143,7 +141,7 @@ const rungs = computed({
       else
         throw Error(`Unknown rung mode ${props.mode}`)
     }
-    else if ( r === 1 && !vectorIsNull(b) ) {
+    else if ( prevR > 1 && r === 1 ) {
       // convert from a range to a single shape
       if (props.mode===0)
         a = vectorDiv(vectorAdd(a,b), 2)