geometry shaders, map poi icons

shaders/map.vert

@@ -1,4 +1,7 @@
 layout(location = 0) in vec3 v_vert;
+layout(location = 2) in vec2 v_coords;
+
+out vec2 g_coords;
 
 #include <common>
 
@@ -7,4 +10,5 @@ void main()
     vec4 clip_pos = projection * vec4(v_vert, 1.0f);
 
 	gl_Position = vec4(clip_pos.xz, 0.5, 1.0);
+	g_coords = v_coords;
 }