convert gl2d and gl3d tick angles from deg to radians

Author: etpinard

src/plots/gl2d/convert.js

@@ -123,7 +123,9 @@ proto.merge = function(options) {
 
             this.tickEnable[i+j] = false;
             this.tickColor[i+j] = str2RGBArray((ax.tickfont || {}).color);
-            this.tickAngle[i+j] = (ax.tickangle === 'auto') ? 0 : -ax.tickangle;
+            this.tickAngle[i+j] = (ax.tickangle === 'auto') ?
+                0 :
+                Math.PI * -ax.tickangle / 180;
             this.tickPad[i+j] = this.getTickPad(ax);
 
             this.tickMarkLength[i+j] = 0;

src/plots/gl3d/layout/convert.js

@@ -109,7 +109,9 @@ proto.merge = function(sceneLayout) {
         if ('tickcolor' in axes) opts.lineTickColor[i] = str2RgbaArray(axes.tickcolor);
         if ('tickwidth' in axes) opts.lineTickWidth[i] = axes.tickwidth;
         if ('tickangle' in axes) {
-            opts.tickAngle[i] = axes.tickangle === 'auto' ? 0 : axes.tickangle;
+            opts.tickAngle[i] = (axes.tickangle === 'auto') ?
+                0 :
+                Math.PI * -axes.tickangle / 180;
         }
         //// tick labels
         if ('showticklabels' in axes) opts.tickEnable[i] = axes.showticklabels;