don't clip glyphs with the frustum

mapbox · Aug 21, 2015 · c4093b5 · c4093b5
1 parent 8d5df59
commit c4093b5
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/sdf.vertex.glsl b/sdf.vertex.glsl
@@ -28,7 +28,7 @@ void main() {
  float a_maxzoom = a_zoom[1];
 
  // u_zoom is the current zoom level adjusted for the change in font size
- float z = 2.0 - step(a_minzoom, u_zoom) - (1.0 - step(a_maxzoom, u_zoom));
+ float show = step(a_minzoom, u_zoom) * (1.0 - step(a_maxzoom, u_zoom));
 
  // fade out labels
  float alpha = clamp((u_fadezoom - a_labelminzoom) / u_fadedist, 0.0, 1.0);
@@ -46,8 +46,8 @@ void main() {
  }
 
  // if label has been faded out, clip it
- z += step(v_alpha, 0.0);
+ show *= (1.0 - step(v_alpha, 0.0));
 
- gl_Position = u_matrix * vec4(a_pos, 0, 1) + u_exmatrix * vec4(a_offset / 64.0, z, 0);
+ gl_Position = u_matrix * vec4(a_pos, 0, 1) + u_exmatrix * vec4(a_offset * show / 64.0, 0, 0);
  v_tex = a_tex / u_texsize;
 }