initial work for integrating sbc model framework v2

lib/fastener.scad

@@ -0,0 +1,48 @@
+/*
+
+    m_insert(type="M3", icolor = "#ebdc8b")
+
+*/
+
+module m_insert(type="M3", icolor = "#ebdc8b") { //#f4e6c3, #ebdc8b 
+    
+    odiam = type == "M3" ? 4.2 : 3.5;
+    idiam = type == "M3" ? 3 : 2.5;
+    iheight = 4;
+    
+    difference() {
+        color(icolor,.6) cylinder(d=odiam, h=iheight);
+        color(icolor,.6) translate([0,0,-1]) cylinder(d=idiam, h=iheight+2);
+    }
+    for(bearing = [0:10:360]) {
+        color(icolor) translate([-.25+(odiam/2)*cos(bearing),-.25+(odiam/2)*sin(bearing),iheight-1.5]) 
+            rotate([0,0,0]) cube([.5,.5,1.5]);
+    }
+}
+
+
+// General purpose screw
+// screw(screw[d, l, style])
+// 	d - thread diameter
+// 	l - thread length
+// 	style - screw head style
+//
+// 	Styles:
+// 	0 - Mushroom head, 5mm diameter
+
+module screw(screw_type) {
+    d = screw_type[0];
+    l = screw_type[1];
+    style = screw_type[2];
+
+    // Head
+        if(style == 0) {
+            difference() {
+                translate([  0,  0, -0.3]) sphere(2.7);
+                translate([-10,-10,-10]) cube([20,20,10]);
+                translate([-10,-10,  2]) cube([20,20,10]);
+            }
+        }
+    // Thread
+        rotate([180,0,0]) cylinder(d=d, h=l);
+}