line

source/shaders/gridvert.glsl

@@ -2,15 +2,16 @@
 layout (location = 0) in vec2 pos;
 out vec2 apos;
 
+uniform vec2 offset;
+
 layout (std140) uniform Projection {
     mat4 projection;
 };
 
 void main()
 {
-    mat4 iproj = inverse(projection);
-    vec4 ipos = iproj * vec4(pos, 0.f, 1.f);
-    apos = ipos.xy;
+    vec4 ipos = inverse(projection) * vec4(pos, 0.f, 1.f);
+    apos = ipos.xy + offset;
 
     gl_Position = vec4(pos, 0.f, 1.f);
-}
+}