Refactor into specs scads

model_strap_brace.stl

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src/export.scad

@@ -0,0 +1,32 @@
+/*
+export=0; // <-- prepend to the main file to activate the export
+*/
+
+function is_not_export() = is_undef(export) || export == 0;
+function is_export() = !is_not_export();
+function is_model_strict(m) = is_export() && export == m;
+function is_model(m) = is_not_export() || export == m;
+
+MODEL_DEMO=0;
+
+// Harness
+MODEL_HARNESS_LEFT=101;
+MODEL_HARNESS_RIGHT=102;
+MODEL_HARNESS_BOTTOM=103;
+MODEL_HARNESS_BOTTOM_PIP=104;
+MODEL_HARNESS_TOP=105;
+MODEL_HARNESS_SLIDER_FRONT=106;
+MODEL_HARNESS_SLIDER_BACK=107;
+MODEL_HARNESS_BUTTONS=108;
+
+// Platform
+MODEL_PLATFORM_HARNESS=201;
+MODEL_PLATFORM_STRAP=202;
+
+// Strap
+MODEL_LINKS=301;
+MODEL_CLIP_A=302;
+MODEL_CLIP_B=303;
+MODEL_CLIP_RATCHETING=304;
+MODEL_CLIP_RATCHETING_A=305;
+MODEL_CLIP_RATCHETING_B=306;

src/harness.scad

@@ -1,3 +1,5 @@
+include <export.scad>
+
 // dependency: https://github.com/revarbat/BOSL
 include <BOSL/constants.scad>
 use <BOSL/transforms.scad>
@@ -5,6 +7,10 @@ use <BOSL/shapes.scad>
 use <BOSL/masks.scad>
 use <BOSL/sliders.scad>
 
+use <specs_phone.scad>
+use <specs_harness.scad>
+use <specs_platform.scad>
+
 // DEBUG:
 //validation = 1;
 XRAY_POSITIVE=1;
@@ -12,22 +18,6 @@ XRAY_BACKPLANE=2;
 XRAY_BOTTOM=3;
 //xray = 2;
 
-// EXPORT:
-MODEL_HARNESS_LEFT=1;
-MODEL_HARNESS_RIGHT=2;
-MODEL_HARNESS_BOTTOM=3;
-MODEL_HARNESS_BOTTOM_PIP=4;
-MODEL_HARNESS_TOP=5;
-MODEL_HARNESS_SLIDER_FRONT=6;
-MODEL_HARNESS_SLIDER_BACK=7;
-MODEL_HARNESS_BUTTONS=8;
-export=0; // [0:8]
-function is_not_export() = is_undef(export) || export == 0;
-function is_export() = !is_not_export();
-function is_model_strict(m) = is_export() && export == m;
-function is_model(m) = is_not_export() || export == m;
-
-function get_phone_size() = [161.2, 77.2, 10];
 function use_slideout_backplane() = is_model_strict(MODEL_HARNESS_BOTTOM_PIP) || is_model_strict(MODEL_HARNESS_LEFT) || is_model_strict(MODEL_HARNESS_RIGHT);
 
 backplane_pip_slideout=10;
@@ -411,7 +401,7 @@ module phone_harness() {
 }
 
 module model() {
-    phone_harness();
+    up(get_platform_size().z + get_harness_size().z/2) phone_harness();
 }
 
 if (!is_undef(validation)) {

src/main.scad

@@ -0,0 +1,6 @@
+export=0;
+include <export.scad>
+
+include <harness.scad>
+include <platform.scad>
+//include <strap.scad>

src/platform.scad

@@ -0,0 +1,70 @@
+include <export.scad>
+
+// dependency: https://github.com/revarbat/BOSL
+include <BOSL/constants.scad>
+use <BOSL/transforms.scad>
+use <BOSL/shapes.scad>
+use <BOSL/masks.scad>
+use <BOSL/sliders.scad>
+
+use <specs_platform.scad>
+use <specs_strap.scad>
+
+use <strap_common.scad>
+
+// DEBUG:
+//validation = 1;
+//xray = 1;
+
+// PROP >>
+module prop_arm() {
+    $fn=$preview ? 10 : 30;
+    arm_size=[200, 55, 40];
+color("gray")
+down(arm_size.z/2) {
+        cuboid(arm_size, fillet=16, edges=EDGES_X_ALL);
+        left(arm_size.x*0.6) scale([1, 1, 0.8]) yrot(90) cylinder(d1=arm_size.y*1.4, d2=arm_size.y*0.95, h=arm_size.x/2);
+    }
+}
+module model_prop_arm() {
+    if (is_not_export()) down(3) prop_arm();
+}
+// <<<
+
+// Blocks:
+module platform(base) {
+    size=get_platform_size();
+    top=!base;
+    up(top?size.z:0)
+    color(top?"Olive":"YellowGreen")
+    cube(size, center=true);
+    
+    module strap_connectors() {
+        down(size.z/2) {
+            for (i=[0:3]) {
+                left((i%2*(-2)+1) * (size.x/2 - get_link_segment_size().y/2))
+                fwd((round(i/2)%2*(-2)+1) * size.y/2)
+                down(get_link_segment_size().z/2)
+                zrot(90 + (round(i/2)%2*180)) link_connector_pin();
+            }
+        }
+    }
+    
+    if (base) {
+        strap_connectors();
+    }
+}
+
+// Models:
+module model_platform_harness() {
+    platform(base=false);
+}
+
+module model_platform_strap() {
+    platform(base=true);
+}
+
+// Export:
+if (is_model(MODEL_PLATFORM_HARNESS)) model_platform_harness();
+if (is_model(MODEL_PLATFORM_STRAP)) model_platform_strap();
+if (is_model(MODEL_DEMO)) model_prop_arm();

src/specs_harness.scad

@@ -0,0 +1,9 @@
+use <specs_phone.scad>
+
+// TODO
+function get_harness_size() = [
+    get_phone_size().x + 10,
+    get_phone_size().y + 10,
+    get_phone_size().z + 10,
+    ];
+

src/specs_phone.scad

@@ -0,0 +1,2 @@
+function get_phone_size() = [161.2, 77.2, 10];
+

src/specs_platform.scad

@@ -0,0 +1,8 @@
+use <specs_phone.scad>
+
+function get_platform_size() = [
+    get_phone_size().x - 5,
+    get_phone_size().y - 5,
+    5
+    ];
+

src/specs_strap.scad

@@ -0,0 +1,11 @@
+function get_link_segment_size() = [15, 30, 5];
+function get_link_pin_diameter() = 2;
+function get_link_socket_slack() = [1, 4, 1];
+function get_link_joiner_arm_size() = [get_link_segment_size().x - 2, 3, get_link_segment_size().z];
+function get_link_socket_size() = [get_link_segment_size().z,
+        get_link_segment_size().y - get_link_joiner_arm_size().y*2,
+        get_link_segment_size().z];
+
+function get_link_clip_size() = [get_link_pin_diameter()*5, get_link_segment_size().y - 5, get_link_segment_size().z];
+function get_link_socket_roundgap() = 2;
+

src/strap.scad

@@ -0,0 +1,270 @@
+links_count=3; // [1..20]
+include_terminal=true; // [true,false]
+
+include <export.scad>
+use <BOSL/transforms.scad>
+use <BOSL/shapes.scad>
+include <BOSL/constants.scad>
+
+use <strap_common.scad>
+
+if (is_model_strict(MODEL_LINKS)) {
+    echo("===============================");
+    echo(str("Strap length: ", (links_count * get_link_segment_size().x), " mm"));
+    echo("===============================");
+}
+
+assert(get_link_segment_size().x >= 10, "Link segment is too short.");
+assert(get_link_segment_size().z >= (get_link_pin_diameter() + get_link_socket_slack().z + 1), "Link segment is too thin.");
+
+module link(terminal=false) {
+    $fn=$preview?4:20;
+    module link_joiner() {
+        gap=get_link_socket_roundgap();
+        segment_size=get_link_segment_size();
+        arm_size=get_link_joiner_arm_size();
+        
+        module pin_to_socket_joiner() {
+            joiner_size=[segment_size.x-get_link_socket_size().x+get_link_socket_size().x*0.2,
+                segment_size.y-4,
+                segment_size.z];
+            difference() {
+                right(joiner_size.x/2 + 4.5) cuboid(joiner_size, fillet=1, edges=EDGES_Z_ALL + EDGES_BOTTOM);
+                right(segment_size.x) scale([1, 2, 1]) pin_socket_area();
+            }
+        }
+        
+        pin_to_socket_joiner();
+    }
+    
+    link_connector_pin();
+    if (terminal) {
+        right(get_link_segment_size().x + 2) zrot(180) link_connector_pin();
+    } else {
+        link_joiner();
+        right(get_link_segment_size().x) link_connector_socket();
+    }
+}
+
+module link_chain(links_count, include_terminal=true) {
+    for (i = [0:links_count-1]) {
+        terminal=(i==links_count-1) && include_terminal;
+        right(i*get_link_segment_size().x) link(terminal=terminal);
+    }
+}
+
+module clip() {
+    $fn=$preview?4:20;
+    socket_size=get_link_socket_size();
+    clip_size=get_link_clip_size();
+    pin_diam=get_link_pin_diameter();
+    slot_slack=get_link_socket_slack();
+    size=[clip_size.x+socket_size.x, clip_size.y, clip_size.z];
+    slot_size=[clip_size.x+slot_slack.x, size.y+1, pin_diam+slot_slack.z];
+    entry_size=[slot_size.x, clip_size.y+1, clip_size.z];
+    entry_pos=[0, 0, 1.5];
+    
+    module socket_area() {
+        $fn=$preview? 10 : 20;
+        xrot(90) down(size.y/2) cylinder(d=size.z, h=size.y);
+    }
+    module socket_cutout() {
+        $fn=$preview? 10 : 20;
+        xrot(90) down(slot_size.y/2) cylinder(d=slot_size.z, h=slot_size.y);
+    }
+    module cover() {
+        translate(entry_pos) cube(entry_size, center=true);
+    }
+    module joiner(groove) {
+        slack=groove?0.2:0;
+        joiner_size=[entry_size.x-6+slack, entry_size.y-6+slack, entry_size.z-3+slack];
+        joiner_pos=[entry_pos.x, entry_pos.y, entry_pos.z - entry_size.z/2 + joiner_size.z/2];
+        translate(joiner_pos) cube(joiner_size, center=true);
+    }
+    
+    module model() {
+        difference() {
+            union() {
+                right(clip_size.x/2) socket_area();
+                left(clip_size.x/2) socket_area();
+                cube(clip_size, center=true);
+            }
+            right(clip_size.x/2) socket_cutout();
+            left(clip_size.x/2) socket_cutout();
+        }
+    }
+    
+    left(socket_size.x/2)
+    {
+        if (is_model(MODEL_CLIP_A)) {
+            difference() {
+                model();
+                cover();
+            }
+            joiner(groove=false);
+        }
+        if (is_model(MODEL_CLIP_B)) {
+            difference() {
+                intersection() {
+                    model();
+                    cover();
+                }
+                joiner(groove=true);
+            }
+        }
+    }
+}
+
+module clip_ratcheting(ratchet_length=28) {
+    $fn=$preview?4:20;
+    socket_size=get_link_socket_size();
+    clip_size=get_link_clip_size();
+    pin_diam=get_link_pin_diameter();
+    slot_slack=get_link_socket_slack();
+    size=[clip_size.x+socket_size.x, clip_size.y, clip_size.z];
+    slot_size=[clip_size.x+slot_slack.x + 0.2, size.y+1, pin_diam+slot_slack.z];
+    entry_size=[slot_size.x-5, clip_size.y+1, clip_size.z];
+    connector_size=[25, 0, 0];
+    module hookRight() {
+        right(connector_size.x/2) zrot(180) link_connector_pin();
+    }
+    module hookLeft() {
+        left(connector_size.x/2) link_connector_pin();
+    }
+    wall=2;
+    tooth_size=[4, 3, 3];
+    module tooth() {
+        s=[tooth_size.x, tooth_size.z, tooth_size.y];
+        up(tooth_size.z/2) xrot(-90) right_triangle(s);
+    }
+    module teethFwd() {
+        tooth_count = ratchet_length/tooth_size.x;
+        fwd((clip_size.y-wall*2)/2)
+        right(ratchet_length/2) {
+            for (i=[1:tooth_count]) {
+                left(i*tooth_size.x) tooth();
+            }
+            cap_size=[ratchet_length, tooth_size.y, 1];
+            up(tooth_size.z/2 + cap_size.z/2) left(cap_size.x/2) back(tooth_size.y/2) {
+                difference() {
+                    cube(cap_size, center=true);
+                    translate([0.1, 0.1, 0]) back(tooth_size.y/2) right(ratchet_length/2) zrot(180) tooth();
+                }
+            }
+        }
+    }
+    module teethBack() {
+        scale([1, -1, 1]) teethFwd();
+    }
+    module ratchetLeft() {
+        right(ratchet_length/2) {
+            difference() {
+                cube([ratchet_length, clip_size.y, clip_size.z], center=true);
+                up(wall/2) cube([ratchet_length, clip_size.y-wall*2, clip_size.z], center=true);
+                right(ratchet_length/2+1) {
+                    slideRailGuide(groove=true);
+                    scale([1,-1,1]) slideRailGuide(groove=true);
+                }
+            }
+            teethFwd();
+            teethBack();
+        }
+    }
+    ratchet_tooth_count=2;
+    ratchet_wall=2.5;
+    ratchet_slack=0.3;
+    rail_slack=0.2;
+    ratchet_tooth_scale_z=0.8;
+    module ratchetTeethFront() {
+        module ratchetButton() {
+            size=[8,wall*4,4];
+            up(size.z+1) fwd(wall*2 - ratchet_wall) cuboid(size, fillet=1, edges=EDGES_FRONT);
+            up(2) back(ratchet_wall/2) cube([size.x, ratchet_wall, tooth_size.z*ratchet_tooth_scale_z + size.z], center=true);
+        }
+        fwd((clip_size.y-wall*2)/2 - tooth_size.y - ratchet_slack)
+        left(ratchet_length) {
+            for (i=[0:ratchet_tooth_count-1]) {
+               right(i*tooth_size.x) scale([-1,-1*(1-i/5),ratchet_tooth_scale_z]) tooth();
+            }
+            ratchetButton();
+        }
+        
+        module ratchetWall() {
+            up(tooth_size.z/2) left(ratchet_length/2 + wall - wall/2) fwd(clip_size.y/2-wall-tooth_size.y-ratchet_wall/2 - ratchet_slack)
+            down(wall/2+0.5) cube([ratchet_length + wall, ratchet_wall, tooth_size.z*ratchet_tooth_scale_z], center=true);
+        }
+        ratchetWall();
+    }
+    module ratchetTeethBack() {
+        scale([1,-1,1]) ratchetTeethFront();
+    }
+    module ratchetRight() {
+        left(wall) cube([wall*2, clip_size.y + rail_slack*2, clip_size.z], center=true);
+        
+        ratchetTeethFront();
+        ratchetTeethBack();
+    }
+    module slideRailGuide(groove) {
+        size=[ratchet_length, wall, wall];
+        fwd(clip_size.y/2 + rail_slack)
+        left(size.x/2) scale(groove?1.5:1) cuboid(size, fillet=0.5);
+    }
+    module slideRailLeft() {
+        size=[ratchet_length, clip_size.y/2 - ratchet_wall*2 - wall/2 - ratchet_slack - tooth_size.y, clip_size.z];
+        right(size.x/2) cube(size, center=true);
+    }
+    module slideRailRight() {
+        size=[ratchet_length + 3, wall*1.5, clip_size.z];
+        module railFront() {
+            fwd(clip_size.y/2 + size.y/2 + rail_slack) left(size.x/2)
+            cuboid(size, fillet=1, edges=EDGES_FRONT);
+            slideRailGuide(groove=false);
+        }
+        module railBack() {
+            scale([1, -1, 1]) railFront();
+        }
+        railFront();
+        railBack();
+    }
+    
+    right(size.x + connector_size.x - 2) {
+        left(2)
+        if (is_model(MODEL_CLIP_RATCHETING_A) || is_model(MODEL_CLIP_RATCHETING)) {
+            left(ratchet_length + wall + 1) {
+                hookLeft();
+                left(0.1) {
+                    ratchetLeft();
+                    slideRailLeft();
+                }
+            }
+        }
+        right(is_model(MODEL_DEMO) ? ratchet_length + 5 : 0)
+        if (is_model(MODEL_CLIP_RATCHETING_B) || is_model(MODEL_CLIP_RATCHETING)) {
+            ratchetRight();
+            hookRight();
+            slideRailRight();
+        }
+    }
+}
+
+// === Export ===
+if (is_model(MODEL_DEMO)) {
+    translate([-20, -40, -10]) zrot(-90) {
+        link_chain(links_count, include_terminal=include_terminal);
+        right(links_count * get_link_segment_size().x + get_link_clip_size().x) {
+            clip();
+            right(get_link_clip_size().x) clip_ratcheting();
+        }
+    }
+} else {
+    if (is_model(MODEL_CLIP_A) || is_model(MODEL_CLIP_B)) {
+        left(get_link_clip_size().x) clip();
+    }
+    if (is_model(MODEL_CLIP_RATCHETING) || is_model(MODEL_CLIP_RATCHETING_A) || is_model(MODEL_CLIP_RATCHETING_B)) {
+        left(get_link_clip_size().x * 2 + 3) clip_ratcheting();
+    }
+    if (is_model(MODEL_LINKS)) for (i = [0:links_count-1]) {
+        terminal=(i==links_count-1) && include_terminal;
+        right(i*get_link_segment_size().x) link(terminal=terminal);
+    }
+}

src/strap_common.scad

@@ -0,0 +1,65 @@
+include <export.scad>
+
+use <BOSL/transforms.scad>
+use <BOSL/shapes.scad>
+include <BOSL/constants.scad>
+
+use <specs_strap.scad>
+
+module pin() {
+    segment_size=get_link_segment_size();
+    h=segment_size.y;
+    d=get_link_pin_diameter();
+    back(h/2) xrot(90) cylinder(h=h, d=d, $fn=$preview ? 10 : 30);
+}
+module pin_socket_area() {
+    segment_size=get_link_segment_size();
+    h=segment_size.y-get_link_socket_slack().y;
+    d=segment_size.z;
+    back(h/2) xrot(90) cylinder(h=h, d=d, $fn=$preview ? 10 : 30);
+}
+module pin_socket() {
+    difference() {
+        pin_socket_area();
+        scaleup = [
+            ((get_link_pin_diameter() + get_link_socket_slack().x) / get_link_pin_diameter()),
+            ((get_link_pin_diameter() + get_link_socket_slack().y) / get_link_pin_diameter()),
+            ((get_link_pin_diameter() + get_link_socket_slack().z) / get_link_pin_diameter())
+        ];
+        scale(scaleup) pin();
+    }
+}
+
+module arm() {
+    segment_size=get_link_segment_size();
+    arm_size=get_link_joiner_arm_size();
+    fwd(segment_size.y/2 + arm_size.y/2 - 1) right(arm_size.x/2 - 1) cuboid(arm_size, fillet=1, edges=EDGES_FRONT + EDGES_Y_ALL);
+}
+module armFront() {
+    arm();
+}
+module armBack() {
+    scale([1, -1, 1]) arm();
+}
+module armJoiner() {
+    gap=get_link_socket_roundgap();
+    arm_size=get_link_joiner_arm_size();
+    segment_size=get_link_segment_size();
+    joiner_size=[arm_size.x-get_link_socket_size().x, segment_size.y, segment_size.z];
+    right(joiner_size.x/2 + get_link_socket_size().x/2 + gap) cuboid(joiner_size, fillet=1, edges=EDGES_Z_ALL + EDGES_BOTTOM);
+}
+module link_arms() {
+    armFront();
+    armBack();
+    armJoiner();
+}
+
+module link_connector_pin() {
+    pin();
+    link_arms();
+}
+
+module link_connector_socket() {
+    pin_socket();
+}
+

strap.scad

@@ -1,134 +0,0 @@
-// dependency: https://github.com/revarbat/BOSL
-include <BOSL/constants.scad>
-use <BOSL/transforms.scad>
-use <BOSL/shapes.scad>
-use <BOSL/masks.scad>
-use <BOSL/sliders.scad>
-
-// DEBUG:
-//validation = 1;
-//xray = 1;
-
-// EXPORT:
-MODEL_STRAP_PLATFORM_BASE=10;
-MODEL_STRAP_PLATFORM_RIB=11;
-MODEL_STRAP_PLATFORM_RIB_BRACE=12;
-MODEL_STRAP_SECONDARY=13;
-export=0; // [0:20]
-function is_not_export() = is_undef(export) || export == 0;
-function is_export() = !is_not_export();
-function is_model_strict(m) = is_export() && export == m;
-function is_model(m) = is_not_export() || export == m;
-
-function get_phone_size() = [160, 76.7, 10];
-
-module arm() {
-    $fn=$preview ? 10 : 30;
-    arm_size=[200, 55, 40];
-color("gray")
-down(arm_size.z/2) {
-        cuboid(arm_size, fillet=16, edges=EDGES_X_ALL);
-        left(arm_size.x*0.6) scale([1, 1, 0.8]) yrot(90) cylinder(d1=arm_size.y*1.4, d2=arm_size.y*0.95, h=arm_size.x/2);
-    }
-}
-
-module strap_platform() {
-    base_size=[40, 70, 2];
-    rib_thickness=5;
-    rib_height=20;
-    rib_pos=[base_size.x/2 - rib_thickness, 0, -1.3];
-    brace_size=[base_size.x, 3.6, 4.8];
-    brace_pos=[0, base_size.y/2 - 4, -1.3];
-    module platform_base() {
-        cutout_size=[(base_size.x-rib_thickness*2 - 2*(base_size.x/2-rib_pos.x)), (base_size.y - 5), 2*base_size.z];
-        difference() {
-            down(base_size.z/2) cuboid(base_size, fillet=2, edges=EDGES_Z_ALL);
-            down(base_size.z/2) cuboid(cutout_size, fillet=2, edges=EDGES_Z_ALL);
-            model_rib_left(socket=true);
-            model_rib_right(socket=true);
-        }
-    }
-    
-    module platform_rib(socket=false) {
-        rib_size=[rib_thickness, base_size.y - 2, rib_height];
-        difference() {
-            union() {
-                difference() {
-                    down(rib_size.z/2) scale(socket ? 1.01 : 1) sparse_strut(h=rib_size.z, l=rib_size.y, thick=rib_size.x, strut=1.2, maxang=40, max_bridge=4);
-                    arm();
-                }
-                difference() {
-                    intersection() {
-                        down(rib_size.z/2) cube(rib_size, center=true);
-                        scale(1.07) arm();
-                    }
-                    down(2) scale(1.0) arm();
-                }
-            }
-            fwd(brace_pos.y) platform_rib_brace(socket=true);
-            back(brace_pos.y) platform_rib_brace(socket=true);
-        }
-    }
-    
-    module platform_rib_brace(socket=false) {
-        down(rib_height - 1.2 - brace_size.z/2) scale(socket ? 1.02 : 1) cuboid(brace_size, fillet=1, edges=EDGES_X_ALL);
-    }
-    
-    module model_rib_left(socket=false) {
-        left(rib_pos.x) up(rib_pos.z) platform_rib(socket=socket);
-    }
-    module model_rib_right(socket=false) {
-        right(rib_pos.x) up(rib_pos.z) platform_rib(socket=socket);
-    }
-    module model_brace_front() {
-        fwd(brace_pos.y) up(brace_pos.z) platform_rib_brace();
-    }
-    module model_brace_back() {
-        back(brace_pos.y) up(brace_pos.z) platform_rib_brace();
-    }
-    
-    if (is_model(MODEL_STRAP_PLATFORM_BASE)) platform_base();
-    if (is_model(MODEL_STRAP_PLATFORM_RIB)) model_rib_left();
-    if (is_model(MODEL_STRAP_PLATFORM_RIB_BRACE)) model_brace_front();
-    if (is_not_export()) {
-        model_rib_right();
-        model_brace_back();
-    }
-}
-
-module strap_secondary() {
-    size=[40, 15, 10];
-    size_base=[size.x, size.y];
-    size_top=[size.x * 0.9, size.y * 0.4];
-    cutout_size=[size.x - 10, size.y*10, size.z - 4];
-    module anchor() {
-        difference() {
-            xrot(180) rounded_prismoid(size1=size_base, size2=size_top, h=size.z, r=5);
-            down(size.z/2) cube(cutout_size, center=true);
-        }
-    }
-    anchor_pos=[60, 30, 0];
-    module anchor_front() {
-        left(anchor_pos.x) fwd(anchor_pos.y) anchor();
-    }
-    module anchor_back() {
-        left(anchor_pos.x) back(anchor_pos.y) anchor();
-    }
-    
-    if (is_model(MODEL_STRAP_SECONDARY)) anchor_front();
-    if (is_not_export()) anchor_back();
-}
-
-module model_strap_platform() {
-    strap_platform();
-}
-module model_strap_secondary() {
-    strap_secondary();
-}
-module model_arm() {
-    if (is_not_export()) down(3) arm();
-}
-
-model_strap_platform();
-model_strap_secondary();
-model_arm();