diff options
Diffstat (limited to 'client/shaders/object_shader/opengl_vertex.glsl')
| -rw-r--r-- | client/shaders/object_shader/opengl_vertex.glsl | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/client/shaders/object_shader/opengl_vertex.glsl b/client/shaders/object_shader/opengl_vertex.glsl index 488089392..59171145f 100644 --- a/client/shaders/object_shader/opengl_vertex.glsl +++ b/client/shaders/object_shader/opengl_vertex.glsl @@ -38,7 +38,12 @@ void main(void) lightVec = sunPosition - worldPosition; eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz; - vIDiff = directional_ambient(normalize(gl_Normal)); + + // This is intentional comparison with zero without any margin. + // If normal is not equal to zero exactly, then we assume it's a valid, just not normalized vector + vIDiff = length(gl_Normal) == 0.0 + ? 1.0 + : directional_ambient(normalize(gl_Normal)); gl_FrontColor = gl_BackColor = gl_Color; } |