Feature: tank distribution scale on Tankopedia stats

packages/website/src/components/Tankopedia/CharacteristicsSection/components/Characteristics/components/InfoWithDelta.tsx

@@ -1,5 +1,5 @@
 import { createDefaultSkills } from "@blitzkit/core";
-import { Flex, Progress, Text } from "@radix-ui/themes";
+import { Box, Flex, Progress, Text } from "@radix-ui/themes";
 import { clamp } from "lodash-es";
 import { memo, useMemo, type ComponentProps, type ReactNode } from "react";
 import { api } from "../../../../../../core/blitzkit/api";
@@ -16,6 +16,7 @@ import {
   TankopediaRelativeAgainst,
 } from "../../../../../../stores/tankopedia";
 import { Info, type InfoProps } from "./Info";
+import { StatScale } from "./StatScale";
 
 type InfoWithDeltaProps = Omit<InfoProps, "name"> & {
   stats: TankCharacteristics;
@@ -122,6 +123,15 @@ export const InfoWithDelta = memo<InfoWithDeltaProps>(
           return othersValue !== undefined;
         }) as TankCharacteristics[];
     }, [relativeAgainst, shellIndex, equipmentMatrix, equalize]);
+    const values = useMemo(
+      () =>
+        others.map((tank) =>
+          typeof props.value === "function"
+            ? props.value(tank)!
+            : (tank[props.value] as number),
+        ),
+      [others],
+    );
     const betterTanks = others.filter((tank) => {
       const othersValue =
         typeof props.value === "function"
@@ -161,6 +171,13 @@ export const InfoWithDelta = memo<InfoWithDeltaProps>(
 
         {!noRanking && (
           <Flex pl={indent ? "2" : "0"} align="center" gap="2">
+            <Box position="relative" flexGrow="1">
+              <StatScale
+                values={values}
+                value={uhWhatDoICallThisVariable}
+                lowerIsBetter={deltaType === "lowerIsBetter"}
+              />
+
               <Progress
                 variant="soft"
                 size="1"
@@ -168,6 +185,7 @@ export const InfoWithDelta = memo<InfoWithDeltaProps>(
                 color={color}
                 style={{ height: "0.125rem", opacity: 0.5 }}
               />
+            </Box>
 
             <Text color="gray" size="1">
               {clamp(betterTanks.length + 1, 1, others.length)} /{" "}

packages/website/src/components/Tankopedia/CharacteristicsSection/components/Characteristics/components/StatScale.tsx

@@ -0,0 +1,71 @@
+import { memo, useMemo } from "react";
+
+const RESOLUTION = 1000;
+const HEIGHT = 9;
+const DENSE_TICKS = 100;
+
+interface StatScaleProps {
+  values: number[];
+  value: number;
+  lowerIsBetter?: boolean;
+}
+
+export const StatScale = memo<StatScaleProps>(
+  ({ values, value, lowerIsBetter }) => {
+    const ticks = useMemo(() => {
+      const min = Math.min(value, ...values);
+      const max = Math.max(value, ...values);
+      const range = max - min;
+      const counts = new Map<number, number>();
+
+      for (const other of values) {
+        const raw = range === 0 ? 0.5 : (other - min) / range;
+        const x = Math.round((lowerIsBetter ? 1 - raw : raw) * RESOLUTION);
+
+        if (x === 0 || x === RESOLUTION) continue;
+
+        counts.set(x, (counts.get(x) ?? 0) + 1);
+      }
+
+      return Array.from(counts, ([x, count]) => ({
+        x,
+        color:
+          count === 1
+            ? "var(--gray-a5)"
+            : count <= 3
+              ? "var(--gray-a6)"
+              : "var(--gray-a7)",
+      }));
+    }, [values, value, lowerIsBetter]);
+
+    return (
+      <div
+        style={{
+          position: "absolute",
+          top: 0,
+          bottom: 0,
+          left: 0,
+          width: "100%",
+          height: HEIGHT,
+          margin: "auto 0",
+          opacity: Math.min(1, Math.sqrt(DENSE_TICKS / ticks.length)),
+          pointerEvents: "none",
+        }}
+      >
+        {ticks.map(({ x, color }) => (
+          <div
+            key={x}
+            style={{
+              position: "absolute",
+              top: 0,
+              left: `${(x / RESOLUTION) * 100}%`,
+              width: 1,
+              height: "100%",
+              backgroundColor: color,
+            }}
+          />
+        ))}
+      </div>
+    );
+  },
+);