include <BOSL2/std.scad>;
include <BOSL2/beziers.scad>;
include <BOSL2/rounding.scad>;
include <BOSL2/skin.scad>;
include <BOSL2/threading.scad>;
include <DotScad/src/bend.scad>;
include <DotScad/src/bend_extrude.scad>;
include <DotScad/src/ellipse_extrude.scad>;
include <DotScad/src/loft.scad>;
/**
* Kitesurf Fins mold
*
*
*
* Requirements :
* - The plunger normaly should be twice the height of the part
*
*/
/************************************************/
/* 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;
/* [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
render_fin = false;
render_mold = true;
render_drill_template = true;
parts = "all"; // [all, top, bottom]
mold_part = "all"; // [all, top, bottom]
// Scaling
scale_factor = 1.0; // [0.1:0.1:2]
// Printable rendering
printable = true;
$fn=64;
/*************/
/* Constants */
/*************/
// Define the offset value as a constant
OFFSET = 0.01;
CLEARING = 0.1;
/************************************************/
/* 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;
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 );
// *****************
// * Fin Drawing *
// *****************
if ( render_fin ) {
scale([scale_factor, scale_factor, scale_factor])
buildFin( fin_thickness );
}
/**
* Render Mold
*/
if ( render_mold ) buildMold();
if ( render_drill_template ) buildDrillTemplate();
/**
* Build mold
*
*/
module buildMold() {
// Bottom mold
if (mold_part != "top")
difference() {
case(mold_base_height,true);
// Piston
down(piston_depth-OFFSET) fwd(20) bottomInsert();
}
// Top Mold
if (mold_part != "bottom")
up(printable ? 0 : 60) fwd(printable ? fin_height+50 : 0) down(mold_base_height) mirror([0,0,printable ? 1 : 0 ]) {
difference() {
union() {
// case
case(mold_top_height,false);
// Piston
mirror([1,0,0])
down(mold_top_height+piston_depth-OFFSET) fwd(20) topPiston();
};
resin_escape(40);
}
}
}
/**
* Mold Case
*
* @param height - Height of the case
* @param bottom - Is bottom or top
*/
module case( height , bottom=true ) {
difference() {
diff() cuboid( [ mold_length, mold_width, height ],
rounding=4,
edges=[bottom ? BOTTOM: TOP],
anchor=TOP ){
// Drills
align(BOTTOM,[FRONT+LEFT,FRONT+RIGHT,BACK+LEFT,BACK+RIGHT],inset=10,overlap=-OFFSET)
color("orange")
tag("remove")
drilling();
};
// Material holes
mirror([bottom ? 0:1,0,0])
back(38) left(55)
color("Red")
up(OFFSET)
rounded_triangle(radius=3, height=height+2*OFFSET);
// Length hole
fwd(32) cuboid([120,10,50],rounding=5);
// Side holes
left(67) cuboid([10,40,50],rounding=5);
right(67) cuboid([10,40,50],rounding=5);
}
}
/**
* Drill template
*
*/
module buildDrillTemplate() {
spacing = 38.5;
drill_depth = 15;
drill_diameter = 6;
template_height = 5;
p1 = 20;
p2 = p1-spacing;
mirror([0,0,printable ? 1 : 0]) difference() {
left(1) color ("Orange") cuboid([fin_width+7,15,10],rounding=3);
down(OFFSET) {
hull(){
left(28) cylinder(h=template_height+2*OFFSET,r=drill_diameter/2);
left(55) cylinder(h=template_height+2*OFFSET,r=drill_diameter/2);
}
hull(){
left(12) cylinder(h=template_height+2*OFFSET,r=drill_diameter/2);
left(-10) cylinder(h=template_height+2*OFFSET,r=drill_diameter/2);
}
hull(){
left(-27) cylinder(h=template_height+2*OFFSET,r=drill_diameter/2);
left(-53) cylinder(h=template_height+2*OFFSET,r=drill_diameter/2);
}
}
xrot(-90) buildFin(fin_thickness + 2*CLEARING );
//left(60) cylinder(h=20,r=6/2);
up(template_height+OFFSET)
{
left(p1)
cylinder(h=drill_depth+template_height,r=drill_diameter/2,orient=DOWN);
left(p2)
cylinder(h=drill_depth,r=drill_diameter/2,orient=DOWN);
}
}
}
module rounded_triangle(radius, height) {
triangle_points = [[0, 0], [75, 0], [0, -35]]; // Equilateral triangle with side length 100
rounded_shape = round_corners( triangle_points, r=radius );
mirror([0,0,1]) linear_extrude(height = height) polygon(rounded_shape);
}
// *****************
// * Bottom insert *
// *****************
module bottomInsert() {
debug=true;
//layer_profile = pathProcess(profile_path);
layer_profile = 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 = profile_path;
difference() {
skin( [ layer_profile,expandPath(layer_profile,3) ], z=[0,piston_depth], slices=0 );
down(OFFSET)
buildFinSide(false);
}
}
/**
* Build fin
*
*/
module buildFin( thickness ) {
union() {
if (parts != "bottom") buildFinSide( thickness );
if (parts != "top") buildFinSide( thickness , true );
}
}
/**
* Build fin side
*
* @param flip - Define it it is top or bottom fin side
*/
module buildFinSide(thickness,flip=false) {
mirror([0,0,flip ? 1 : 0])
color(flip ? "Gray" : "LightGray") /*up(fin_thickness/4)*/ /*down(fin_thickness) */
ellipse_extrude( thickness / 2 )
polygon(profile_path);
}
module resin_escape(length) {
color ("Blue") cylinder(h=length, r=resin_escape_diameter/2);
}
// *****************
// * Drilling *
// *****************
module drilling(){
/*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
);
}
module subtracted(anchor) {
color("Red") fwd(40) left(40) cube([fin_width+100,fin_height+100,20],anchor=anchor);
}
// Draw fin profile
if (draw_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]]);
/**
* 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 ("Base thickness" ,str(base_tickness," mm"));
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);
// Surf Fin profile
fin_profile = pathProfile( profile_points );
function expandPath(path,delta) =
offset(
deduplicate(path),
delta=delta,
chamfer=false,
same_length=true
)
;