Node Editor: Visual tweaks to node links

Several visual tweaks to node links to make them overall fit in
better with the look of the node editor:

- Change the link thickness with the zoom level to a certain degree.
- Remove the fuzziness of the node link and its shadow/outline.
- The link outline color can now be made transparent.
- Add circles at the end of dragged links when connecting to sockets.
- Improve the banding of the color interpolation along the link.
- Adjust the spacing of dashes along straight node links.

Reviewed By: Pablo Vazquez, Hans Goudey

Differential Revision: http://developer.blender.org/D15036

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/editors/space_node/node_draw.cc b/source/blender/editors/space_node/node_draw.cc
index 2cee7c4984a..a5b4d2bcf4e 100644
--- a/source/blender/editors/space_node/node_draw.cc
+++ b/source/blender/editors/space_node/node_draw.cc
@@ -758,6 +758,7 @@ static void node_socket_outline_color_get(const bool selected,
   }
   else {
     UI_GetThemeColor4fv(TH_WIRE, r_outline_color);
+    r_outline_color[3] = 1.0f;
   }
 }
 
@@ -2263,6 +2264,7 @@ static void node_draw_basis(const bContext &C,
 
     if (node.flag & NODE_MUTED) {
       UI_GetThemeColor4fv(TH_WIRE, color_underline);
+      color_underline[3] = 1.0f;
     }
     else {
       UI_GetThemeColorBlend4f(TH_BACK, color_id, 0.2f, color_underline);
@@ -3142,7 +3144,7 @@ void node_draw_space(const bContext &C, ARegion &region)
     GPU_line_smooth(true);
     if (snode.runtime->linkdrag) {
       for (const bNodeLink *link : snode.runtime->linkdrag->links) {
-        node_draw_link(C, v2d, snode, *link, true);
+        node_draw_link_dragged(C, v2d, snode, *link);
       }
     }
     GPU_line_smooth(false);