transform instead of transformed

Author: mbostock

src/channel.d.ts

@@ -109,6 +109,9 @@ export interface Channel {
    */
   filter?: ((value: any) => boolean) | null;
 
+  /** Whether to apply the scale’s transform, if any; defaults to true. */
+  transform?: boolean;
+
   /**
    * An internal hint to affect the default construction of scales. For example,
    * the dot mark uses a channel hint to affect the default range of the

src/plot.js

@@ -385,20 +385,20 @@ function applyScaleTransforms(channels, options) {
   return channels;
 }
 
-// Note: mutates channel.value to apply the scale transform, if any.
+// Note: mutates channel.value to apply the scale transform, if any. Also sets
+// channel.transform to false to prevent duplicate transform application.
 function applyScaleTransform(channel, options) {
-  const {scale} = channel;
-  if (scale == null || channel.transformed) return;
+  const {scale, transform: t = true} = channel;
+  if (scale == null || !t) return;
   const {
     type,
     percent,
     interval,
     transform = percent ? (x) => x * 100 : maybeIntervalTransform(interval, type)
   } = options[scale] ?? {};
-  if (transform != null) {
-    channel.value = map(channel.value, transform);
-    channel.transformed = true;
-  }
+  if (transform == null) return;
+  channel.value = map(channel.value, transform);
+  channel.transform = false;
 }
 
 // An initializer may generate channels without knowing how the downstream mark