if marker-line-width is 0 no border should be renderered fixed #16

lib/torque/renderer/cartocss_render.js

@@ -6,27 +6,36 @@
   function renderPoint(ctx, st) {
     ctx.fillStyle = st.fillStyle;
     ctx.strokStyle = st.strokStyle;
-    var pixel_size = st['point-radius']
+    var pixel_size = st['point-radius'];
+
     // render a circle
+
+    // fill
     ctx.beginPath();
     ctx.arc(0, 0, pixel_size, 0, TAU, true, true);
     ctx.closePath();
-    if(st.fillStyle) {
-      if(st.fillOpacity) {
+    if (st.fillStyle) {
+      if (st.fillOpacity) {
         ctx.globalAlpha = st.fillOpacity;
       }
       ctx.fill();
     }
+
+    // stroke
     ctx.globalAlpha = 1.0;
-    if(st.strokeStyle) {
-      if(st.strokeOpacity) {
+    if (st.strokeStyle && st.lineWidth) {
+      if (st.strokeOpacity) {
         ctx.globalAlpha = st.strokeOpacity;
       }
-      if(st.lineWidth) {
+      if (st.lineWidth) {
         ctx.lineWidth = st.lineWidth;
       }
       ctx.strokeStyle = st.strokeStyle;
-      ctx.stroke();
+
+      // do not render for alpha = 0
+      if (ctx.globalAlpha > 0) {
+        ctx.stroke();
+      }
     }
   }
 
@@ -38,7 +47,7 @@
     ctx.drawImage(img, 0, 0, w, h);
   }
 
-  exports.torque.cartocss = exports.torque.cartocss|| {};
+  exports.torque.cartocss = exports.torque.cartocss || {};
   exports.torque.cartocss = {
     renderPoint: renderPoint,
     renderSprite: renderSprite