From baa645f5ece348f911c93cc31d05ffbb66b5f0ee Mon Sep 17 00:00:00 2001
From: Fen Dweller <chemicalcrux@gmail.com>
Date: Thu, 18 Jun 2020 09:30:50 -0400
Subject: [PATCH] Make the vertical scale scroll with movement

---
 macrovision.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/macrovision.js b/macrovision.js
index 45219cbe..14e60215 100644
--- a/macrovision.js
+++ b/macrovision.js
@@ -375,8 +375,16 @@ function drawVerticalScale(ifDirty = false) {
         return;
     function drawTicks(/** @type {CanvasRenderingContext2D} */ ctx, pixelsPer, heightPer) {
         let total = heightPer.clone();
-        total.value = math.unit(config.y, "meters").toNumber(config.unit);
-        for (let y = ctx.canvas.clientHeight - 50; y >= 50; y -= pixelsPer) {
+        total.value = config.y;
+        let y = ctx.canvas.clientHeight - 50;
+
+        let offset = total.toNumber("meters") % heightPer.toNumber("meters");
+
+        y += offset / heightPer.toNumber("meters") * pixelsPer;
+        total = math.subtract(total, math.unit(offset, "meters"));
+
+        console.log(offset)
+        for (; y >= 50; y -= pixelsPer) {
             drawTick(ctx, 50, y, total);
             total = math.add(total, heightPer);
         }