correct wave function for extremes opacityscale - fix issue 4723

plotly · archmoj · Apr 6, 2020 · Apr 2, 2020 · Apr 2, 2020 · eeb32a4560596ad078cc73fa2f69c72d12b34d24
commit eeb32a4560596ad078cc73fa2f69c72d12b34d24
diff --git a/src/traces/surface/defaults.js b/src/traces/surface/defaults.js
@@ -24,7 +24,7 @@ function createWave(n, minOpacity) {
        var v = minOpacity + (1 - minOpacity) * (1 - Math.pow(Math.sin(n * u * Math.PI), 2));
        arr.push([
            u,
-            Math.max(1, Math.min(0, v))
+            Math.max(0, Math.min(1, v))
        ]);
    }
    return arr;

diff --git a/test/image/baselines/gl3d_volume_multiple-traces.png b/test/image/baselines/gl3d_volume_multiple-traces.png