551 lines
14 KiB
OpenSCAD
551 lines
14 KiB
OpenSCAD
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include <BOSL2/std.scad>;
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include <BOSL2/beziers.scad>;
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include <BOSL2/rounding.scad>;
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include <BOSL2/skin.scad>;
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include <BOSL2/threading.scad>;
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include <DotScad/src/bend.scad>;
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include <DotScad/src/bend_extrude.scad>;
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include <DotScad/src/ellipse_extrude.scad>;
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include <DotScad/src/loft.scad>;
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/************************************************/
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/* Parameters */
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/************************************************/
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/* [Fin Specs] */
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fin_height = 51; // 10 inches in mm
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fin_width = 120; // Width at the base in mm
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fin_top_withdraw = 10;
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fin_back_withraw = 20;
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fin_start_angle = 60; // Angle [Point 0 ]
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fin_sweep = 25; // Sweep Angle [Point 1]
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fin_edge_angle = 30;
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fin_edge_strength = 30;
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fin_counter_angle = 30; // counter angle [Point 2]
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fin_counter_strength = 10; // Length [Point 2]
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// Length at the base in mm
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fin_base = 114;
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fin_width_tip = 5; // Width at the tip in mm
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fin_thickness = 8; // Thickness of the fin in mm
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fin_end_angle = 110;
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fin_end_strength = 30;
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// Back
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fin_back_height = 30; // Percent height
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fin_back_widthdraw = 20; // Percent height
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fin_back_angle = 20; // back angle
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fin_back_strength=30;
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/* [Base Specs] */
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base_tickness=8;
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base_extra_thickness=20;
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/* [Debugging] */
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// Showing all layers
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show_debug_layers = false;
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// Draw master profile
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draw_profile = false;
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// Draw Fin
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build_fin = false;
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// Build mold
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build_mold = true;
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/* [Mold] */
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// Mold base height
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mold_base_height = 10;
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mold_top_height = 5;
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mold_extra_width = 15;
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mold_piston_height = 10;
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resin_escape_diameter=4;
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// Diameter for screw holes in mm
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merge_holes_diameter = 6;
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piston_depth = 5;
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/* [Rendering] */
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// Rendering parts
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parts = "all"; // [all, top, bottom]
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mold_part = "all"; // [all, top, bottom]
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// Scaling
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scale_factor = 1.0; // [0.1:0.1:2]
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// Printable rendering
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printable = true;
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// Rendering mold
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//render_mold = true;
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$fn=64;
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/*************/
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/* Constants */
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/*************/
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// Define the offset value as a constant
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OFFSET = 0.01;
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/************************************************/
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/* Derived variable */
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mold_width = fin_height +2 * mold_extra_width;
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mold_length = fin_width +2 * mold_extra_width;
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mold_height = mold_base_height;
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drilling_length = mold_base_height+mold_piston_height+2*OFFSET;
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pt1_x = adj_ang_to_opp(fin_height,fin_sweep)+fin_base/2;
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pt1_y = fin_height;
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//back_point = [fin_width-7,fin_height/2];
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tail_point = [fin_width-3,fin_height/5];
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edge_point = [fin_width-fin_top_withdraw,fin_height-2];
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counter_edge_point = [fin_width-6,fin_height-8];
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/******************/
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/* Profile points */
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/******************/
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profile_points = [
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// *****************
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// INITIAL POINT
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// *****************
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[0,0], // Point 0
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[opp_ang_to_adj(fin_height/3,fin_start_angle),fin_height/3], // Handle 0
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// *****************
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// TOP POINT
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// *****************
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[pt1_x-fin_base/5,pt1_y], // Handle 1 (Start)
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[pt1_x,pt1_y], // Point 1
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[pt1_x+fin_base/7,pt1_y], // Handle 1 (End)
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// *****************
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// EDGE POINT
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// *****************
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handle(edge_point,140 ,4),
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edge_point, // Point Edge Point
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handle(edge_point,-45,4),
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// *****************
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// COUNTER EDGE POINT
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// *****************
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handle(counter_edge_point,120,4),
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counter_edge_point, // Point Counter Edge
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handle(counter_edge_point,-110,13),
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// *****************
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// TAIL Point
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// *****************
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handle(tail_point,115 ,10),
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tail_point,
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handle(tail_point,0,0),
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// *****************
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// END POINT
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// *****************
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handle([fin_base,0],60,3),
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[fin_base,0] // End point
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];
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profile_path = translate_path( asCurve(profile_points),-fin_width/2 );
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function asCurve(points) = bezier_curve(points/*,N=3*/,splinesteps=128);
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function handle(point,angle,strength) = [
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//point[0] + adj_ang_to_opp(strength,angle) /** xAngleFactor(angle)*/,
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//point[1] + /*(angle>0 ? strength :-strength)*/ strength * yAngleFactor(angle),
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point[0] + polar_to_xy(strength,angle)[0] ,
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point[1] + polar_to_xy(strength,angle)[1]
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];
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function xAngleFactor(angle) = angle > 0 && angle < 180 ? 1 : -1;
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function yAngleFactor(angle) = angle > -90 && angle < 90 ? 1 : -1;
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//function counterTop(x,withdraw,height) = [x-withdraw, height ];
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function handleStart(x,withdraw,angle,strength) = [x+adj_ang_to_opp(strength,angle), x-withdraw +strength];
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function handleEnd(x,withdraw,angle,strength) = [x-adj_ang_to_opp(strength,angle), x-withdraw -strength];
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function endHandle(angle)=
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angle < 90 ?
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[fin_base + adj_ang_to_opp(fin_end_strength,90-angle),fin_end_strength]
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:
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[fin_base - adj_ang_to_opp(fin_end_strength,angle-90),fin_end_strength]
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;
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//function backPoint() = [fin_base-(fin_back_widthdraw/100*fin_base),fin_back_height/100*fin_height];
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function decrease_y(points, percentage) = [ for (p = points) [p[0], p[1] * (1 - percentage/100)]];
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function pathProfile(points) = bezpath_curve(points,N=3);
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// Surf Fin profile
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fin_profile = pathProfile( profile_points );
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function expandPath(path,delta) =
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offset(
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deduplicate(path),
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delta=delta,
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chamfer=false,
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same_length=true
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)
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;
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// *****************
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// * Fin Drawing *
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// *****************
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if (build_fin) {
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scale([scale_factor, scale_factor, scale_factor]) buildFin();
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}
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if (build_mold) {
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buildMold();
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}
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/**
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* Build mold
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*
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*/
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module buildMold() {
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// Bottom mold
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difference() {
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case(mold_base_height,true);
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// Piston
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down(piston_depth-OFFSET) fwd(20) bottomInsert();
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}
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// Top Mold
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up(printable ? 0 : 60) fwd(printable ? fin_height+50 : 0) down(mold_base_height) mirror([0,0,printable ? 1 : 0 ]) {
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difference() {
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union() {
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// case
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case(mold_top_height,false);
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// Piston
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mirror([1,0,0])
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down(mold_top_height+piston_depth-OFFSET) fwd(20) topPiston();
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};
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resin_escape(40);
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};
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};
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}
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/**
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* Mold Case
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*
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* @param height - Height of the case
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* @param bottom - Is bottom or top
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*/
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module case_old(height,bottom=true) {
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diff() cuboid( [ mold_length, mold_width, height ],
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rounding=4,
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edges=[bottom ? BOTTOM: TOP],
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anchor=TOP ){
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// Drills
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align(BOTTOM,[FRONT+LEFT,FRONT+RIGHT,BACK+LEFT,BACK+RIGHT],inset=10,overlap=-OFFSET)
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color("orange")
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tag("remove")
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drilling();
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// Material holes
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/*
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align(TOP,[CENTER+BACK+LEFT],inside=true,inset=15,overlap=-OFFSET)
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color("Red") wedge([mold_height+2*OFFSET, 50, 30], center=true,orient=FRONT,spin=-90 );
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*/
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// Material holes
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align(TOP,[CENTER+BACK+LEFT]/*,inside=true*/,inset=15,overlap=-OFFSET)
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color("Red")
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up(OFFSET)
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tag("remove")
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rounded_triangle(radius=3, height=height+2*OFFSET);
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}
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}
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module case(height,bottom=true) {
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difference() {
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diff() cuboid( [ mold_length, mold_width, height ],
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rounding=4,
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edges=[bottom ? BOTTOM: TOP],
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anchor=TOP ){
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// Drills
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align(BOTTOM,[FRONT+LEFT,FRONT+RIGHT,BACK+LEFT,BACK+RIGHT],inset=10,overlap=-OFFSET)
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color("orange")
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tag("remove")
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drilling();
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// Material holes
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/*
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align(TOP,[CENTER+BACK+LEFT],inside=true,inset=15,overlap=-OFFSET)
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color("Red") wedge([mold_height+2*OFFSET, 50, 30], center=true,orient=FRONT,spin=-90 );
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*/
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};
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// Material holes
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mirror([bottom ? 0:1,0,0])
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back(38) left(55)
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color("Red")
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up(OFFSET)
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//tag("remove")
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rounded_triangle(radius=3, height=height+2*OFFSET);
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// Length hole
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fwd(32) cuboid([120,10,50],rounding=5);
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// Side holes
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left(67) cuboid([10,40,50],rounding=5);
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right(67) cuboid([10,40,50],rounding=5);
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}
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}
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module rounded_triangle(radius, height) {
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triangle_points = [[0, 0], [75, 0], [0, -35]]; // Equilateral triangle with side length 100
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// Round the corners of the triangle
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rounded_shape = round_corners( triangle_points, r=radius );
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// Extrude the 2D rounded triangle
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//mirror([0,0,1]) linear_extrude(height = height) polygon(rounded_shape);
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mirror([0,0,1]) linear_extrude(height = height) polygon(rounded_shape);
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//mirror([0,0,1]) linear_extrude(height = height) polygon(round_corners(right_triangle([40,30]),r=radius));
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//mirror([0,0,1]) linear_extrude(height = height) polygon(right_triangle([40,30]));
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//mirror([0,0,1]) cyl(l=80, r=10); // Work with cylinder
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}
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// *****************
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// * Bottom insert *
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// *****************
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module bottomInsert() {
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debug=true;
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//layer_profile = pathProcess(profile_path);
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layer_profile = profile_path;
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skin( [ layer_profile,expandPath(layer_profile,3) ], z=[0,piston_depth], slices=0 )
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//up(debug ? 2 : 0)
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up(OFFSET)
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buildFinSide(true)
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;
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}
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// *****************
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// * Top piston *
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// *****************
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module topPiston() {
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debug=true;
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layer_profile = profile_path;
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difference() {
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skin( [ layer_profile,expandPath(layer_profile,3) ], z=[0,piston_depth], slices=0 );
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down(OFFSET)
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buildFinSide(false);
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}
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}
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/**
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* Build fin side
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*
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* @param flip - Define it it is top or bottom fin side
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*/
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module buildFinSide(flip=false) {
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debug=false;
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mirror([0,0,flip ? 1 : 0])
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color(flip ? "Gray" : "LightGray") /*up(fin_thickness/4)*/ /*down(fin_thickness) */
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ellipse_extrude( fin_thickness/2*(debug?1.2:1))
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polygon(profile_path);
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}
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module resin_escape(length) {
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color ("Blue") cylinder(h=length, r=resin_escape_diameter/2);
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}
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// *****************
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// * Drilling *
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// *****************
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module drilling(){
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//length = mold_base_height+mold_piston_height+10;
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/*fwd(20)*/ color("Red") /*up(mold_piston_height+5)*/ up(-OFFSET)
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orient(DOWN)
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threaded_rod(
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d=merge_holes_diameter,
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l=drilling_length,
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pitch=1.5,
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anchor=BOTTOM,
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//orient=BOTTOM
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);
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}
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//drilling();
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module buildFin() {
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if (false)
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union(){
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difference(){
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union() {
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if (parts != "bottom")
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//buildFinSide([layer_0,layer_1,layer_2],fin_thickness/2);
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buildFinSide();
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if (parts != "top")
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buildFinSide(true);
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//zflip()
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// buildFinSide([layer_0,layer_1,layer_2],fin_thickness/2);
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}
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color("Red") cube([fin_base+20,base_extra_thickness+20,base_tickness+20],anchor=LEFT+BACK);
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}
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}
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}
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module subtracted(anchor) {
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color("Red") fwd(40) left(40) cube([fin_width+100,fin_height+100,20],anchor=anchor);
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}
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if (show_debug_layers) {
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left(130) {
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showDebugPath(layer_0);
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showDebugPath(layer_1);
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showDebugPath(layer_2);
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assert(is_path(layer_3),"Layer 3 is not a path");
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showDebugPath(layer_3);
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//showDebugPath(layer_4);
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}
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left(230)
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showDebugPath(vertical_profile);
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//showDebugPath(layer_3);
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}
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if (draw_profile) {
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// Draw fin profile
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drawProfile( profile_points, true );
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}
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/**
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* Displays debug information for a path by visualizing its self-crossings.
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*
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* @param path - The input path to analyze for self-crossings.
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*
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* This module:
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* - Splits the path at points where it intersects itself.
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* - Renders each segment of the split path with different colors for easy identification.
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*/
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module showDebugPath(path) {
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assert(is_path(path),"Path to show is not a path");
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assert(is_path_simple(path),"Path is not simple");
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rainbow(split_path_at_self_crossings(path))
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stroke($item, closed=false, width=0.2);
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}
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/**
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* Draws a profile based on Bezier path points with optional debug visualization.
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*
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* @param points - Array of points defining the Bezier path.
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* @param debug - Boolean flag to enable/disable debug visualization. Defaults to true.
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*
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* This module:
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* - Calculates the closest point on the Bezier path to a fixed point.
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* - Draws the Bezier path with debug information if debug is true.
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* - Optionally shows spheres at specific points for debugging (currently commented out).
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*/
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module drawProfile( points,debug = true ){
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pt = [100,0];
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pos = bezpath_closest_point(points, pt);
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xy = bezpath_points(points,pos[0],pos[1]);
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debug_bezier(points, N=3,width=0.2);
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//color("red") translate(pt) sphere(r=6);
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//color("blue") translate(xy) sphere(r=6);
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}
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/**
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* Adds a base to the given path by extending it with additional points.
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*
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* @param path - The original path to which the base will be added.
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* @return A new path with an added base.
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*
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* This function concatenates:
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* - The original path (`pathProfile`).
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* - A point `fin_base` which might represent the start or end of the base.
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* - Points for additional thickness (`-base_extra_thickness`) at both ends of the base.
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*/
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function addBase(path) = concat(path,[[fin_base,-base_extra_thickness],[0,-base_extra_thickness]]);
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/**
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* Function to translate a path manually along X and Y
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*/
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function translate_path(path, dx=0, dy=0) =
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[for (p = path) [p[0] + dx, p[1] + dy]];
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// Function to print points of a path
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module print_path_points(path) {
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for (i = [0:len(path)-1]) {
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echo(str("\t Point ", i, ": [", path[i][0], ", ", path[i][1], "]"));
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}
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}
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echo ("**********************");
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echo ("* Configuration *");
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echo ("**********************");
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//echo ("Layers count" ,len(layers));
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echo ("Base thickness" ,str(base_tickness," mm"));
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