include ; include ; include ; include ; include ; include ; include ; include ; include ; /************************************************/ /* Parameters */ /************************************************/ /* [Fin Specs] */ fin_height = 51; // 10 inches in mm fin_width = 120; // Width at the base in mm fin_top_withdraw = 10; fin_back_withraw = 20; fin_start_angle = 60; // Angle [Point 0 ] fin_sweep = 25; // Sweep Angle [Point 1] fin_edge_angle = 30; fin_edge_strength = 30; fin_counter_angle = 30; // counter angle [Point 2] fin_counter_strength = 10; // Length [Point 2] // Length at the base in mm fin_base = 114; fin_width_tip = 5; // Width at the tip in mm fin_thickness = 8; // Thickness of the fin in mm fin_end_angle = 110; fin_end_strength = 30; // Back fin_back_height = 30; // Percent height fin_back_widthdraw = 20; // Percent height fin_back_angle = 20; // back angle fin_back_strength=30; /* [Base Specs] */ base_tickness=8; base_extra_thickness=20; /* [Debugging] */ // Showing all layers show_debug_layers = false; // Draw master profile draw_profile = false; // Draw Fin build_fin = false; // Build mold build_mold = true; /* [Mold] */ // Mold base height mold_base_height = 10; mold_top_height = 5; mold_extra_width = 15; mold_piston_height = 10; resin_escape_diameter=4; // Diameter for screw holes in mm merge_holes_diameter = 6; piston_depth = 5; /* [Rendering] */ // Rendering parts parts = "all"; // [all, top, bottom] mold_part= "all"; // [all, top, bottom] // Scaling scale_factor = 1.0; // [0.1:0.1:2] // Rendering mold //render_mold = true; $fn=64; /*************/ /* Constants */ /*************/ // Define the offset value as a constant OFFSET = 0.01; /************************************************/ /* Derived variable */ mold_width = fin_height +2 * mold_extra_width; mold_length = fin_width +2 * mold_extra_width; mold_height = mold_base_height; drilling_length = mold_base_height+mold_piston_height+2*OFFSET; pt1_x = adj_ang_to_opp(fin_height,fin_sweep)+fin_base/2; pt1_y = fin_height; //back_point = [fin_width-7,fin_height/2]; tail_point = [fin_width-3,fin_height/5]; edge_point = [fin_width-fin_top_withdraw,fin_height-2]; counter_edge_point = [fin_width-6,fin_height-8]; /******************/ /* Profile points */ /******************/ profile_points = [ // ***************** // INITIAL POINT // ***************** [0,0], // Point 0 [opp_ang_to_adj(fin_height/3,fin_start_angle),fin_height/3], // Handle 0 // ***************** // TOP POINT // ***************** [pt1_x-fin_base/5,pt1_y], // Handle 1 (Start) [pt1_x,pt1_y], // Point 1 [pt1_x+fin_base/7,pt1_y], // Handle 1 (End) // ***************** // EDGE POINT // ***************** handle(edge_point,140 ,4), edge_point, // Point Edge Point handle(edge_point,-45,4), // ***************** // COUNTER EDGE POINT // ***************** handle(counter_edge_point,120,4), counter_edge_point, // Point Counter Edge handle(counter_edge_point,-110,13), // ***************** // TAIL Point // ***************** handle(tail_point,115 ,10), tail_point, handle(tail_point,0,0), // ***************** // END POINT // ***************** handle([fin_base,0],60,3), [fin_base,0] // End point ]; profile_path = translate_path( asCurve(profile_points),-fin_width/2 ); function asCurve(points) = bezier_curve(points/*,N=3*/,splinesteps=128); function handle(point,angle,strength) = [ //point[0] + adj_ang_to_opp(strength,angle) /** xAngleFactor(angle)*/, //point[1] + /*(angle>0 ? strength :-strength)*/ strength * yAngleFactor(angle), point[0] + polar_to_xy(strength,angle)[0] , point[1] + polar_to_xy(strength,angle)[1] ]; function xAngleFactor(angle) = angle > 0 && angle < 180 ? 1 : -1; function yAngleFactor(angle) = angle > -90 && angle < 90 ? 1 : -1; //function counterTop(x,withdraw,height) = [x-withdraw, height ]; function handleStart(x,withdraw,angle,strength) = [x+adj_ang_to_opp(strength,angle), x-withdraw +strength]; function handleEnd(x,withdraw,angle,strength) = [x-adj_ang_to_opp(strength,angle), x-withdraw -strength]; function endHandle(angle)= angle < 90 ? [fin_base + adj_ang_to_opp(fin_end_strength,90-angle),fin_end_strength] : [fin_base - adj_ang_to_opp(fin_end_strength,angle-90),fin_end_strength] ; //function backPoint() = [fin_base-(fin_back_widthdraw/100*fin_base),fin_back_height/100*fin_height]; function decrease_y(points, percentage) = [ for (p = points) [p[0], p[1] * (1 - percentage/100)]]; function pathProfile(points) = bezpath_curve(points,N=3); function remove_last(arr) = select(arr, 0, len(arr) - 2); // Surf Fin profile fin_profile = pathProfile( profile_points ); //vertical_profile = pathProfile(vertical_shape); // **************** // * Slicing * // **************** /* layer_0 = pathProcess(addBase(fin_profile)); // Master layer with base layer_1 = contract(layer_0,-5); layer_2 = contract(layer_1,-4); layer_3 = contract(layer_2,-4); layer_4 = contract(layer_3,-2); //echo ("layer_2",layer_2); //echo ("layer_3",layer_3); //layers = [layer_0,layer_1,layer_2,layer_3,layer_4]; layers = [layer_0,layer_1,layer_2,layer_3]; */ function pathProcess2(path) = subdivide_path(path,100); function pathProcess(path) = path; function expandPath(path,delta) = pathProcess( offset( deduplicate(path), delta=delta, chamfer=false, same_length=true ) ); // ***************** // * Fin Drawing * // ***************** if (build_fin) { scale([scale_factor, scale_factor, scale_factor]) buildFin(); } // ***************** // * Mold * // ***************** /* if (build_mold) { back(mold_width/2-mold_extra_width-5) // Bottom mold diff() cuboid( [ mold_length, mold_width, mold_height ],anchor=TOP ) { // Bottom Insert align(TOP,overlap=-OFFSET,inside=true) bottomInsert(); // Drills align(BOTTOM,[FRONT+LEFT,FRONT+RIGHT,BACK+LEFT,BACK+RIGHT],inset=10,overlap=-OFFSET) color("orange") tag("remove") drilling(); // Top Mold if (mold_part != "bottom") align(TOP) //color("Goldenrod") //color([255, 215, 0,0.1]) up(OFFSET*3) diff() { color("Orange") cuboid([ mold_length, mold_width, mold_piston_height ]); position(TOP) down(OFFSET) tag("remove") resin_escape(); } } ; } */ if (build_mold) { back(mold_width/2-mold_extra_width-5) // Bottom mold difference() { case(mold_base_height); // Piston down(piston_depth-OFFSET) fwd(20) bottomInsert(); } // Top Mold fwd(0) up(60) { // Top Mold case(mold_top_height); // Piston down(mold_top_height+piston_depth-OFFSET) fwd(20) topPiston(); } } module case(height) { diff() cuboid( [ mold_length, mold_width, height ],anchor=TOP ){ // Drills align(BOTTOM,[FRONT+LEFT,FRONT+RIGHT,BACK+LEFT,BACK+RIGHT],inset=10,overlap=-OFFSET) color("orange") tag("remove") drilling(); // Material holes align(TOP,[CENTER+BACK+LEFT],inside=true,inset=15,overlap=-OFFSET) color("Red") wedge([mold_height+2*OFFSET, 50, 30], center=true,orient=FRONT,spin=-90); } } // ***************** // * Bottom insert * // ***************** module bottomInsert() { debug=true; layer_profile = pathProcess(profile_path); skin( [ layer_profile,expandPath(layer_profile,3) ], z=[0,piston_depth], slices=0 ) //up(debug ? 2 : 0) up(OFFSET) buildFinSide(true) ; } // ***************** // * Top piston * // ***************** module topPiston() { debug=true; layer_profile = pathProcess(profile_path); difference() { %skin( [ layer_profile,expandPath(layer_profile,3) ], z=[0,piston_depth], slices=0 ); down(OFFSET) buildFinSide(false); } } //up(50) topPiston(); /** * Build fin side * * @param flip - Define it it is top or bottom fin side */ module buildFinSide(flip=false) { debug=false; mirror([0,0,flip ? 1 : 0]) color(flip ? "Gray" : "LightGray") /*up(fin_thickness/4)*/ /*down(fin_thickness) */ ellipse_extrude( fin_thickness/2*(debug?1.2:1)) polygon(profile_path); } module resin_escape() { color ("Blue") cylinder(h=drilling_length, r=resin_escape_diameter/2); } // ***************** // * Drilling * // ***************** module drilling(){ //length = mold_base_height+mold_piston_height+10; /*fwd(20)*/ color("Red") /*up(mold_piston_height+5)*/ up(-OFFSET) orient(DOWN) threaded_rod( d=merge_holes_diameter, l=drilling_length, pitch=1.5, anchor=BOTTOM, //orient=BOTTOM ); } //drilling(); module buildFin() { if (false) union(){ difference(){ union() { if (parts != "bottom") //buildFinSide([layer_0,layer_1,layer_2],fin_thickness/2); buildFinSide(); if (parts != "top") buildFinSide(true); //zflip() // buildFinSide([layer_0,layer_1,layer_2],fin_thickness/2); } color("Red") cube([fin_base+20,base_extra_thickness+20,base_tickness+20],anchor=LEFT+BACK); } } } module subtracted(anchor) { color("Red") fwd(40) left(40) cube([fin_width+100,fin_height+100,20],anchor=anchor); } echo ("layerHeights(3,thickness):",layerHeights(3,base_tickness/2)); if (show_debug_layers) { left(130) { showDebugPath(layer_0); showDebugPath(layer_1); showDebugPath(layer_2); assert(is_path(layer_3),"Layer 3 is not a path"); showDebugPath(layer_3); //showDebugPath(layer_4); } left(230) showDebugPath(vertical_profile); //showDebugPath(layer_3); } if (draw_profile) { // Draw fin profile drawProfile( profile_points, true ); } /** * Displays debug information for a path by visualizing its self-crossings. * * @param path - The input path to analyze for self-crossings. * * This module: * - Splits the path at points where it intersects itself. * - Renders each segment of the split path with different colors for easy identification. */ module showDebugPath(path) { assert(is_path(path),"Path to show is not a path"); assert(is_path_simple(path),"Path is not simple"); rainbow(split_path_at_self_crossings(path)) stroke($item, closed=false, width=0.2); } /** * Draws a profile based on Bezier path points with optional debug visualization. * * @param points - Array of points defining the Bezier path. * @param debug - Boolean flag to enable/disable debug visualization. Defaults to true. * * This module: * - Calculates the closest point on the Bezier path to a fixed point. * - Draws the Bezier path with debug information if debug is true. * - Optionally shows spheres at specific points for debugging (currently commented out). */ module drawProfile( points,debug = true ){ pt = [100,0]; pos = bezpath_closest_point(points, pt); xy = bezpath_points(points,pos[0],pos[1]); debug_bezier(points, N=3,width=0.2); //color("red") translate(pt) sphere(r=6); //color("blue") translate(xy) sphere(r=6); } /** * Adds a base to the given path by extending it with additional points. * * @param path - The original path to which the base will be added. * @return A new path with an added base. * * This function concatenates: * - The original path (`pathProfile`). * - A point `fin_base` which might represent the start or end of the base. * - Points for additional thickness (`-base_extra_thickness`) at both ends of the base. */ function addBase(path) = concat(path,[[fin_base,-base_extra_thickness],[0,-base_extra_thickness]]); /** * Calculates heights for n layers where the first layer starts at 0 and the last at fin_thickness. * * @param n - Number of layers. * @param fin_thickness - The total height to be divided. * @return An array where each element represents the height of the top of each layer. */ function layerHeights(n, fin_thickness) = let( layer_height = fin_thickness / (n - 1) ) [ for (i = [0 : n-1]) i * layer_height ]; /** * Function to translate a path manually along X and Y */ function translate_path(path, dx=0, dy=0) = [for (p = path) [p[0] + dx, p[1] + dy]]; // Function to print points of a path module print_path_points(path) { for (i = [0:len(path)-1]) { echo(str("\t Point ", i, ": [", path[i][0], ", ", path[i][1], "]")); } } echo ("**********************"); echo ("* Configuration *"); echo ("**********************"); //echo ("Layers count" ,len(layers)); echo ("Base thickness" ,str(base_tickness," mm")); //echo ("Layers heights" ,layerHeights(len(layers),fin_thickness/2));