From c97ba9787feeea2c5b3c717b5c77592030573c96 Mon Sep 17 00:00:00 2001
From: Przemek Grondek <przemek@grondek.pl>
Date: Mon, 31 Jan 2022 22:18:14 +0100
Subject: [PATCH] Add new type - center stud

---
 LEGO_wtolerance.scad | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/LEGO_wtolerance.scad b/LEGO_wtolerance.scad
index 1880efc..fb37546 100644
--- a/LEGO_wtolerance.scad
+++ b/LEGO_wtolerance.scad
@@ -16,7 +16,7 @@ block_length = 6;
 block_height_ratio = 1; // [.33333333333:1/3, .5:1/2, 1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8, 9:9, 10:10]
 
 // What type of block should this be? For type-specific options, see the "Wings," "Slopes," "Curves", and "Baseplates" tabs.
-block_type = "brick"; // [brick:Brick, tile:Tile, wing:Wing, slope:Slope, curve:Curve, baseplate:Baseplate]
+block_type = "center"; // [brick:Brick, tile:Tile, wing:Wing, slope:Slope, curve:Curve, baseplate:Baseplate, center:Center Stud]
 
 // What brand of block should this be? LEGO for regular LEGO bricks, Duplo for the toddler-focused larger bricks.
 block_brand = "lego"; // [lego:LEGO, duplo:DUPLO]
@@ -276,7 +276,7 @@ module block(
                     }
 
                     // The studs on top of the block (if it's not a tile).
-                    if ( type != "tile" && !real_dual_bottom ) {
+                    if ( type != "tile" && type != "center" && !real_dual_bottom ) {
                         translate([stud_diameter * stud_rescale / 2, stud_diameter * stud_rescale / 2, 0]) 
                         translate([(overall_length - total_studs_length)/2, (overall_width - total_studs_width)/2, 0]) {
                             for (ycount=[0:real_width-1]) {
@@ -288,6 +288,16 @@ module block(
                             }
                        }
                     }
+                    // Center Stud
+                    if (type == "center"){
+                        translate([axle_diameter / 2, axle_diameter / 2, 0]) {
+                            translate([(overall_length - total_axles_length)/2, (overall_width - total_axles_width)/2, 0]) {
+                                ycount = (real_width )/2;
+                                xcount = (real_length)/2;
+                                translate([(xcount-1)*stud_spacing,(ycount-1)*stud_spacing,block_height*real_height]) stud("hollow");
+                            }
+                        }
+                    }
 
                     // Interior splines to catch the studs.
                     translate([stud_spacing / 2 - wall_play - (spline_thickness/2), 0, 0]) for (xcount = [0:real_length-1]) {
@@ -692,7 +702,7 @@ module block(
         }
     }
 
-    module stud() {
+    module stud(stud_type = stud_type) {
         difference() {
             cylinder(r=(stud_diameter*stud_rescale)/2,h=stud_height,$fs=cylinder_precision);