Add more brick types

Lego.json

@@ -4,6 +4,16 @@
             "type": "1",
             "studs_x": "4",
             "studs_y": "2"
+        },
+        "Brick_2x2": {
+            "type": "1",
+            "studs_x": "2",
+            "studs_y": "2"
+        },
+        "Brick_2x1": {
+            "type": "1",
+            "studs_x": "2",
+            "studs_y": "2"
         }
     },
     "fileFormatVersion": "1"

Lego.scad

@@ -10,6 +10,8 @@ stud_details = 4 * ($preview ? 5 : 10);
 wall_width = 1.4;
 ceiling_width = 1;
 
+assert(studs_x >= studs_y, "studs_x must be equal or larger than studs_y");
+
 module stud() {
 	cylinder(d = 4.8, h = 1.8, $fn = stud_details);
 }
@@ -37,11 +39,19 @@ module pillar() {
 	cylinder(h = block_height, d = 6.51, $fn = stud_details);
 }
 
+module small_pillar() {
+	cylinder(h = block_height, d = 3.2, $fn = stud_details);
+}
+
 module pillars() {
 	if (studs_x >= 2 && studs_y >= 2) {
 		for (x = [0:studs_x-2], y = [0:studs_y-2])
 		translate([(x+1) * length_per_stud, (y+1) * length_per_stud, 0])
 		pillar();
+	} else if (studs_y >= 2) {
+		for (x = [0:studs_x-2])
+		translate([(x+1) * length_per_stud, length_per_stud/2, 0])
+		small_pillar();
 	}
 }