From 9d4fa6b330b0c9f402961dbdf918042a5bd663ad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Dante=20Ursini?= <sursini@gmail.com>
Date: Sun, 19 Jan 2025 22:46:17 -0300
Subject: [PATCH] Bottom mold for 10inch fin

---
 Surf-Fins-10inch.json |   8 +--
 Surf-Fins-10inch.scad | 115 ++++++++++++++++++++++--------------------
 lib/chinook.scad      |  10 ++--
 3 files changed, 69 insertions(+), 64 deletions(-)

diff --git a/Surf-Fins-10inch.json b/Surf-Fins-10inch.json
index df4d03c..3c56ef4 100644
--- a/Surf-Fins-10inch.json
+++ b/Surf-Fins-10inch.json
@@ -5,8 +5,9 @@
             "$fn": "64",
             "base_extra_thickness": "20",
             "base_tickness": "8",
-            "build_box": "true",
-            "build_fin": "true",
+            "build_box": "false",
+            "build_fin": "false",
+            "build_mold": "true",
             "draw_profile": "false",
             "fin_back_angle": "20",
             "fin_back_height": "30",
@@ -29,14 +30,13 @@
             "merge_holes_diameter": "6",
             "mold_base_height": "10",
             "mold_extra_width": "15",
-            "mold_part": "all",
+            "mold_part": "bottom",
             "mold_piston_height": "10",
             "mold_top_height": "5",
             "parts": "all",
             "piston_depth": "5",
             "printable": "false",
             "render_drill_template": "false",
-            "render_mold": "false",
             "resin_escape_diameter": "4",
             "scale_factor": "1",
             "show_curve_points": "false",
diff --git a/Surf-Fins-10inch.scad b/Surf-Fins-10inch.scad
index 9d6394c..64488b3 100644
--- a/Surf-Fins-10inch.scad
+++ b/Surf-Fins-10inch.scad
@@ -148,7 +148,7 @@ draw_profile = false;
 // Rendering parts
 build_fin       = false;
 build_box       = false;
-render_mold     = true;
+build_mold     = true;
 render_drill_template     = false;
 
 parts           = "all";      // [all, top, bottom]
@@ -256,59 +256,9 @@ if (draw_profile) {
     
     layers = [profile_curve,layer0,layer1,layer2,layer3,layer4];
     
-    
-    /*
-    echo ("profile_curve");
-    print_path_points (profile_curve);
-    echo ("layer0");
-    print_path_points (layer0);
-    */
-    
-    
-    /*
-    left(200) {
-        // Turning a VNF into geometry
-        vnf = skin(layers,slices=0,z=layerHeights(len(layers),fin_thickness),method="fast_distance");
-        
-        //vnf1 = up(50, p=vnf);
-        //bent1 = vnf_bend(vnf1, axis="X",r=10);
-        
-        vnf2 = vnf_hull(vnf);
-        vnf_polyhedron(vnf2);
-        
-        
-        // Expanded
-        
-        //expanded_vnf = vnf_small_offset(vnf,20);
-        //back(80) vnf_polyhedron(expanded_vnf);
-        
-        
-        back(380) vnf_polyhedron(vnf_sheet(vnf,-30));
-        
-        
-        //vnf_polyhedron(vnf);
-        //vnf_wireframe(vnf);
-    }    
-    */
-    //left(365) polygon( profile_curve );
-    
-    //test = round_corners(polygon(profile_curve), radius=20, closed=false, $fn=72);
-    
     left (800) color ("Green") polygon(profile_curve);
     
-        left (1000) color ("Green") shell(10) polygon(profile_curve);
-
-    /*    
-        convex_offset_extrude(
-            bottom = os_circle(r=5),
-            top=os_circle(r=5), 
-            height=10,
-            offset="delta",
-            angle=70
-        )
-      */  
-           
-            
+       left (1000) color ("Green") shell(10) polygon(profile_curve);
     
 }    
 
@@ -350,22 +300,54 @@ if ( build_fin )
         buildFin( fin_thickness );
 
 if ( build_box ) {
-    left(80)  xflip() finfit(fin_base+20, [1,1,0]);
+      buildBox();
 } 
         
 /**
  * Render Mold
  */
-if ( render_mold )              buildMold();    
+if ( build_mold )              buildMold();    
 if ( render_drill_template )    buildDrillTemplate();
 
 
+module buildCompletFin() {
+    union(){
+        buildFin( fin_thickness );
+        buildBox();
+    }
+}
+
+
+module buildBox() {
+    left(80) xflip() 
+        finfit(fin_base+20, [1,1,0],false,false);
+}
+
+
 /**
  * Build mold
  * 
  */
 module buildMold() {
-    // Bottom mold
+    
+    moldContour =  expandPath(profile_curve,mold_extra_width);
+    showDebugPath(moldContour);
+    moldHeight = 10;
+    skirtHeight = 30;
+    buildMoldSkirt(skirtHeight,mold_extra_width,3);
+    
+    if (mold_part != "top") {
+        difference() {
+            union() {
+                down(moldHeight) linear_extrude (moldHeight) polygon(moldContour);  // bottom 
+                back(5) left(95) cube([20+10,25,moldHeight],anchor=BACK+TOP);          // Box shell
+            };
+            buildCompletFin();
+        }
+    }
+    
+    //left(300) linear_extrude (skirtHeight) polygon(moldSkirtRegion);
+    /*
     if (mold_part !=  "top") 
         difference() { 
             case(mold_base_height,true);
@@ -386,6 +368,29 @@ module buildMold() {
                 resin_escape(40);
             }
         }      
+    */    
+}
+module buildMoldSkirt( height,offset,thickness ) {
+    outside = expandPath(profile_curve,offset);
+    inside = expandPath(profile_curve,offset-thickness);
+    down(height) {
+        // Skirt
+        linear_extrude (height) difference() {
+            polygon(outside);
+            polygon(inside);
+        };
+        difference() {
+        //union() {
+            intersection() {
+                ycopies(30,10,sp=[-100,0,0]) 
+                    cube([fin_width*1.3,thickness,height]);
+                linear_extrude (height) polygon(outside);
+            };
+            up(height) buildCompletFin();    
+        }
+        
+        
+    }
 }
 
 /**
diff --git a/lib/chinook.scad b/lib/chinook.scad
index 18541c4..f29f38c 100644
--- a/lib/chinook.scad
+++ b/lib/chinook.scad
@@ -1,25 +1,25 @@
-module chinook(length)
+module chinook(length,screw = true,pin=true)
 {
     difference()
     {
         base_cube(length);
         tab_cut();
-        screw_cut();
+        if (screw) screw_cut();
         back_round_cut(length);
-        pin_cut(length);
+        if (pin) pin_cut(length);
         thickness_cut(length, thick/2);
         thickness_cut(length, -thick/2);
     }
 }
 
-module finfit(base_length, mirror_vec)
+module finfit(base_length, mirror_vec,screw = true,pin=true)
 {
     front_offset = tab_length;
     length = base_length + tab_length;
     echo ("length:",length);
     mirror(mirror_vec)
     translate([0,-front_offset, 0])
-    chinook(length);
+    chinook( length, screw ,pin );
 }
 
 module base_cube(BaseLength)