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Diffstat (limited to 'source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl')
-rw-r--r-- | source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl | 15 |
1 files changed, 15 insertions, 0 deletions
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 5bc9a8bef85..8ebfa4376f0 100644 --- a/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl +++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl @@ -15,9 +15,24 @@ out vec4 vPos; out vec4 pPos; out ivec4 vData; +#ifdef VERTEX_FACING +uniform mat4 ProjectionMatrix; +uniform mat3 NormalMatrix; + +in vec3 vnor; +out float vFacing; +#endif + void main() { vPos = ModelViewMatrix * vec4(pos, 1.0); pPos = ModelViewProjectionMatrix * vec4(pos, 1.0); vData = data; +#ifdef VERTEX_FACING + vec3 view_normal = normalize(NormalMatrix * vnor); + vec3 view_vec = (ProjectionMatrix[3][3] == 0.0) + ? normalize(vPos.xyz) + : vec3(0.0, 0.0, 1.0); + vFacing = dot(view_vec, view_normal); +#endif } |