257 lines
7.5 KiB
OpenSCAD
257 lines
7.5 KiB
OpenSCAD
|
|
include <BOSL2/std.scad>;
|
|
include <BOSL2/beziers.scad>;
|
|
include <BOSL2/rounding.scad>;
|
|
include <BOSL2/skin.scad>;
|
|
|
|
|
|
/************************************************/
|
|
/* Parameters */
|
|
/************************************************/
|
|
|
|
/* [Fin Specs] */
|
|
|
|
fin_height = 250; // 10 inches in mm
|
|
fin_width = 240; // Width at the base in mm
|
|
fin_top_withdraw = 30;
|
|
fin_back_withraw = 20;
|
|
|
|
fin_start_angle = 70; // Angle [Point 0 ]
|
|
fin_sweep = 25; // Sweep Angle [Point 1]
|
|
|
|
fin_counter_angle = 30; // counter angle [Point 2]
|
|
fin_counter_strength = 20; // Length [Point 2]
|
|
|
|
fin_base = 200; // Width at the base in mm
|
|
|
|
|
|
fin_width_tip = 5; // Width at the tip in mm
|
|
fin_thickness = 5; // 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=9.2;
|
|
base_extra_thickness=80;
|
|
|
|
|
|
|
|
/* [Debugging] */
|
|
|
|
//Showing all layers
|
|
show_debug_layers = false;
|
|
|
|
// Draw master profile
|
|
draw_profile = false;
|
|
|
|
/************************************************/
|
|
|
|
|
|
|
|
$fn=32;
|
|
|
|
|
|
pt1_x = adj_ang_to_opp(fin_height,fin_sweep)+fin_base/2;
|
|
pt1_y = fin_height;
|
|
|
|
|
|
control_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-100,pt1_y], // Handle 1 (Start)
|
|
[pt1_x,pt1_y], // Point 1
|
|
[pt1_x+30,pt1_y], // Handle 1 (End)
|
|
// *****************
|
|
// COUNTER POINT
|
|
// *****************
|
|
handleStart(fin_width,fin_top_withdraw,fin_counter_angle,fin_counter_strength),
|
|
counterTop(fin_width,fin_top_withdraw), // [250,220], // Point 2
|
|
handleEnd(fin_width,fin_top_withdraw,fin_counter_angle,fin_counter_strength),
|
|
// *****************
|
|
// BACK POINT
|
|
// *****************
|
|
handle(backPoint(),fin_back_angle,fin_back_strength),
|
|
backPoint(),
|
|
handle(backPoint(),-fin_back_angle,fin_back_strength),
|
|
// *****************
|
|
// END POINT
|
|
// *****************
|
|
endHandle(fin_end_angle), // End Handle
|
|
[fin_base,0] // End point
|
|
];
|
|
|
|
|
|
function counterTop(x,withdraw) = [x, x-withdraw ];
|
|
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 handle(point,angle,strength) = [point[0] + adj_ang_to_opp(strength,angle),point[1] + (angle>0 ? strength :-strength)];
|
|
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);
|
|
|
|
|
|
pathProfile = pathProfile( control_points );
|
|
|
|
//base = square([fin_base,13 ], center=true);
|
|
//base = [[0,0],[fin_base,0],[fin_base,-base_extra_thickness],[0,-base_extra_thickness]];
|
|
//base = [/*[fin_base,0],*/[fin_base,-base_extra_thickness],[0,-base_extra_thickness],[0,0]];
|
|
//base = [/*[fin_base,0],*/[fin_base,-base_extra_thickness],[0,-base_extra_thickness]];
|
|
|
|
//path = concat(remove_last_item(pathProfile), base);
|
|
//path = concat(pathProfile, base);
|
|
path = addBase(path);
|
|
|
|
|
|
|
|
|
|
if (false) {
|
|
|
|
|
|
|
|
path2 = offset(path,delta=-10,chamfer=true);
|
|
path3 = offset(path2,delta=-10,chamfer=true);
|
|
|
|
|
|
up (80) color("Green") polygon(path2);
|
|
|
|
//path2[0][1] = 0;
|
|
|
|
/*
|
|
path2b = concat(
|
|
[[0, 0]], // New first point
|
|
[for (i = [1:len(path2)-1]) path2[i]] // Rest of the points unchanged
|
|
);
|
|
path3b = concat(
|
|
[[0, 0]], // New first point
|
|
[for (i = [1:len(path3)-1]) path3[i]] // Rest of the points unchanged
|
|
);
|
|
echo("path2",path2);
|
|
echo("path2b",path2b);
|
|
*/
|
|
|
|
//path2 = bezpath_curve(decrease_y(control_points,10),N=3);
|
|
|
|
//path2 = offset_path(path, -20, closed=true);
|
|
|
|
|
|
if (false) up (10) color("Red") %polygon(path2);
|
|
if (false) up (12) color("Blue") %polygon(path3);
|
|
|
|
|
|
if (false) up(50) color("Green") offset_sweep(path, height=20, bottom=os_circle(r=10), top=os_circle(r=10), steps=15);
|
|
|
|
sinwave = os_profile(points=[for(theta=[0:5:720]) [4*sin(theta), theta/700*15]]);
|
|
|
|
if (false) up(80) color("Yellow") offset_sweep(path, height=20, top=sinwave, $fn=32);
|
|
|
|
|
|
lin_path=[[300,0,0],[300,20,0],[300,100,0]];
|
|
//lin_path = [ [0, 0, 0], [33, 33, 33], [66, 33, 40], [100, 0, 0], [150,0,0] ];
|
|
|
|
//up(80) path_extrude(lin_path) circle(r=30, $fn=6); //path;
|
|
//up(80) path_extrude(lin_path) [polygon(path),polygon(path2)]; //path;
|
|
|
|
//skin([octagon(4), circle($fn=70,r=2)], z=[0,3], slices=10);
|
|
skin([path,path2/*,path3*/],slices=0,z=[0,base_tickness/2/*,6*/]);
|
|
|
|
|
|
|
|
/*
|
|
path_extrude2d(path, caps=true, closed=false)
|
|
move_copies([[-3.5,1.5],[0.0,3.0],[3.5,1.5]])
|
|
circle(r=1.5);
|
|
*/
|
|
}
|
|
|
|
|
|
if (show_debug_layers) {
|
|
showDebugPath(path);
|
|
|
|
}
|
|
if (draw_profile) {
|
|
// Draw fin profile
|
|
drawProfile( control_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_simple(path),"Path is not simple");
|
|
paths = split_path_at_self_crossings(path);
|
|
//left(100)
|
|
rainbow(paths)
|
|
stroke($item, closed=false, width=1);
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* 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);
|
|
//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(pathProfile,[fin_base,-base_extra_thickness],[0,-base_extra_thickness]);
|
|
|
|
|