Commit before attempt to remove geometry shaders from shadow extrusion

shader/lighting/lineShadow.geom

@@ -3,7 +3,8 @@ layout (lines_adjacency) in;
 layout (triangle_strip, max_vertices = 4) out;
 layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 uniform vec3 lightPos;
-vec4 shift (vec4 p) { return (vec4 (p.xyz + (100000*(p.xyz-lightPos)), 1));}
+//vec4 shift (vec4 p) { return (vec4 (p.xyz + (100000*(p.xyz-lightPos)), 1));}
+vec4 shift (vec4 p) { return (vec4 (p.xyz + (1000*(p.xyz-lightPos)), 1));}
 // copied from lighting/cap.geom, should not be changed on its own
 vec4 projNear (vec4 pos)
 {
@@ -34,7 +35,7 @@ void main()
     //vec3 n2 = n0 + n1; // assumes the summands are normalized
     vec3 lightDir = p0.xyz - lightPos.xyz;
     // first test if the edge is part of the silhouette
-    // that is, if the normals of the faces connected by the edge point in
+    // that is, if the normals of the faces connected by the edge point are in
     // "different directions" wrt the light direction
     if ( dot(n0 , lightDir) * dot(n1 , lightDir) <= 0 ) 
                 // using <= rather than < seems to get rid of overlapping shadow