Commit: d07cde8de8ecf388c36115d137b8809ceb07f836
Author: Clément Foucault
Date: Mon Feb 11 14:37:19 2019 +0100
Branches: master
https://developer.blender.org/rBd07cde8de8ecf388c36115d137b8809ceb07f836
Fix T61374 : vertex not visible/selectable if it is at objects origin
It was caused by Null normal if the vertex is at origin. Just add a small
bias to avoid this case.
===================================================================
M source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
===================================================================
diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
b/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
index 378c5d2417a..982ef2ca801 100644
--- a/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
@@ -77,7 +77,7 @@ void main()
#if !defined(FACE) && !defined(EDGE_DECORATION)
/* Facing based color blend */
vec4 vpos = ModelViewMatrix * vec4(pos, 1.0);
- vec3 view_normal = normalize(NormalMatrix * vnor);
+ vec3 view_normal = normalize(NormalMatrix * vnor + 1e-4);
vec3 view_vec = (ProjectionMatrix[3][3] == 0.0)
? normalize(vpos.xyz)
: vec3(0.0, 0.0, 1.0);
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