improve dashed and patterned line antialiasing

in perspective view. This is exactly the same approach used for regular
lines. I just forgot to implement it for these types of lines.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mbgl/shader/line.vertex.glsl b/src/mbgl/shader/line.vertex.glsl
index 3b3caaab15..980212384b 100644
--- a/src/mbgl/shader/line.vertex.glsl
+++ b/src/mbgl/shader/line.vertex.glsl
@@ -34,13 +34,13 @@ void main() {
 
     // Scale the extrusion vector down to a normal and then up by the line width
     // of this vertex.
-    vec4 dist = vec4(u_linewidth.s * a_extrude * scale, 0.0, 0.0);
+    vec2 dist = u_linewidth.s * a_extrude * scale;
 
     // Remove the texture normal bit of the position before scaling it with the
     // model/view matrix. Add the extrusion vector *after* the model/view matrix
     // because we're extruding the line in pixel space, regardless of the current
     // tile's zoom level.
-    gl_Position = u_matrix * vec4(floor(a_pos * 0.5) + dist.xy / u_ratio, 0.0, 1.0);
+    gl_Position = u_matrix * vec4(floor(a_pos * 0.5) + dist / u_ratio, 0.0, 1.0);
 
     // position of y on the screen
     float y = gl_Position.y / gl_Position.w;