no implicit round

src/axis.js

@@ -1,5 +1,4 @@
 import {axisTop, axisBottom, axisRight, axisLeft} from "d3";
-import {interpolateRound} from "d3";
 import {create} from "d3";
 
 export class AxisX {
@@ -60,7 +59,7 @@ export class AxisX {
     const ty = offsetSign * offset + (axis === "top" ? marginTop : height - marginBottom);
     return create("svg:g")
         .attr("transform", `translate(0,${ty})`)
-        .call((axis === "top" ? axisTop : axisBottom)(round(x))
+        .call((axis === "top" ? axisTop : axisBottom)(x)
             .ticks(Array.isArray(ticks) ? null : ticks, typeof tickFormat === "function" ? null : tickFormat)
             .tickFormat(typeof tickFormat === "function" || !x.tickFormat ? tickFormat : null)
             .tickSizeInner(tickSize)
@@ -145,7 +144,7 @@ export class AxisY {
     const tx = offsetSign * offset + (axis === "right" ? width - marginRight : marginLeft);
     return create("svg:g")
         .attr("transform", `translate(${tx},0)`)
-        .call((axis === "right" ? axisRight : axisLeft)(round(y))
+        .call((axis === "right" ? axisRight : axisLeft)(y)
             .ticks(Array.isArray(ticks) ? null : ticks, typeof tickFormat === "function" ? null : tickFormat)
             .tickFormat(typeof tickFormat === "function" || !y.tickFormat ? tickFormat : null)
             .tickSizeInner(tickSize)
@@ -176,12 +175,6 @@ export class AxisY {
   }
 }
 
-function round(scale) {
-  return scale.interpolate // TODO round band and point scales?
-      ? scale.copy().interpolate(interpolateRound)
-      : scale;
-}
-
 function gridX(y2) {
   return g => g.selectAll(".tick line")
     .clone(true)

src/marks/rule.js

@@ -47,8 +47,8 @@ export class RuleX extends Mark {
           .data(index)
           .join("line")
             .call(applyDirectStyles, this)
-            .attr("x1", X ? i => Math.round(X[i]) : (marginLeft + width - marginRight) / 2)
-            .attr("x2", X ? i => Math.round(X[i]) : (marginLeft + width - marginRight) / 2)
+            .attr("x1", X ? i => X[i] : (marginLeft + width - marginRight) / 2)
+            .attr("x2", X ? i => X[i] : (marginLeft + width - marginRight) / 2)
             .attr("y1", Y1 ? i => Y1[i] : marginTop)
             .attr("y2", Y2 ? (y.bandwidth ? i => Y2[i] + y.bandwidth() : i => Y2[i]) : height - marginBottom)
             .attr("stroke", S && (i => S[i]))
@@ -102,8 +102,8 @@ export class RuleY extends Mark {
             .call(applyDirectStyles, this)
             .attr("x1", X1 ? i => X1[i] : marginLeft)
             .attr("x2", X2 ? (x.bandwidth ? i => X2[i] + x.bandwidth() : i => X2[i]) : width - marginRight)
-            .attr("y1", Y ? i => Math.round(Y[i]) : (marginTop + height - marginBottom) / 2)
-            .attr("y2", Y ? i => Math.round(Y[i]) : (marginTop + height - marginBottom) / 2)
+            .attr("y1", Y ? i => Y[i] : (marginTop + height - marginBottom) / 2)
+            .attr("y2", Y ? i => Y[i] : (marginTop + height - marginBottom) / 2)
             .attr("stroke", S && (i => S[i]))
             .call(title(L)))
       .node();

src/marks/tick.js

@@ -64,10 +64,10 @@ export class TickX extends AbstractTick {
     selection.call(applyTransform, x, null, 0.5, 0);
   }
   _x1(scales, {x: X}) {
-    return i => Math.round(X[i]);
+    return i => X[i];
   }
   _x2(scales, {x: X}) {
-    return i => Math.round(X[i]);
+    return i => X[i];
   }
   _y1(scales, {y: Y}, {marginTop}) {
     return Y ? i => Y[i] : marginTop;
@@ -98,10 +98,10 @@ export class TickY extends AbstractTick {
     return X ? i => X[i] + x.bandwidth() : width - marginRight;
   }
   _y1(scales, {y: Y}) {
-    return i => Math.round(Y[i]);
+    return i => Y[i];
   }
   _y2(scales, {y: Y}) {
-    return i => Math.round(Y[i]);
+    return i => Y[i];
   }
 }