Source

gltut / Tut 10 Plane Lights / data / ModelPosVertexLighting_PN.vert

Diff from to

Tut 10 Plane Lights/data/ModelPosVertexLighting_PN.vert

 layout(location = 0) in vec3 position;
 layout(location = 2) in vec3 normal;
 
-out vec4 interpColor;
+smooth out vec4 interpColor;
 
 uniform vec3 modelSpaceLightPos;
 uniform vec4 lightIntensity;