From ebc0c7c0b98b67408edf950e2d7c9745f8be3d21 Mon Sep 17 00:00:00 2001 From: user Date: Tue, 30 Jan 2024 21:00:01 +0100 Subject: [PATCH] catear_headband v0.5: add chamfering --- catear_headband.scad | 124 +++++++++++++++++++++++++------------------ 1 file changed, 71 insertions(+), 53 deletions(-) diff --git a/catear_headband.scad b/catear_headband.scad index c59303f..ac2a4bd 100644 --- a/catear_headband.scad +++ b/catear_headband.scad @@ -1,61 +1,75 @@ include -module catear(height, thickness, fractal=0, side_len=30, bend_factor=0.5, stretch_factor=1.2, debug=false) { - $A=[0, side_len/2]; - $B=[0,-side_len/2]; - $C=[-(side_len/2/sin(120))*1.5*stretch_factor, 0]; - $c=sqrt(pow($A.x-$B.x, 2)+pow($A.y-$B.y, 2)); - $b=sqrt(pow($A.x-$C.x, 2)+pow($A.y-$C.y, 2)); - $a=sqrt(pow($C.x-$B.x, 2)+pow($C.y-$B.y, 2)); - $hc=-$C.x; - $alpha=asin($hc/$b); - $beta=$alpha; - $gamma=180-$alpha-$beta; - $delta=180*bend_factor; - $bend_radius=$a/(2*cos(90-$delta/2)); - $bend_offset=$bend_radius*sin(90-$delta/2); +use - translate([0, -$c/2, 0]) - rotate($beta, [0, 0, 1]) - translate([0, $a/2, 0]) - translate([$bend_offset, 0, 0]) - color("#00ffff") partial_ring( - part=$delta/360, - radius=$bend_radius, - thickness=thickness, - height=height - ); - translate([0, $c/2, 0]) +module catear(height, thickness, fractal=0, side_len=30, bend_factor=0.5, stretch_factor=1.2, debug=false, chamfer=CHAMFER, chamfer_shape=CHAMFER_SHAPE) { + $A=[0, side_len/2]; + $B=[0,-side_len/2]; + $C=[-(side_len/2/sin(120))*1.5*stretch_factor, 0]; + $c=sqrt(pow($A.x-$B.x, 2)+pow($A.y-$B.y, 2)); + $b=sqrt(pow($A.x-$C.x, 2)+pow($A.y-$C.y, 2)); + $a=sqrt(pow($C.x-$B.x, 2)+pow($C.y-$B.y, 2)); + $hc=-$C.x; + $alpha=asin($hc/$b); + $beta=$alpha; + $gamma=180-$alpha-$beta; + $delta=180*bend_factor; + $bend_radius=$a/(2*cos(90-$delta/2)); + $bend_offset=$bend_radius*sin(90-$delta/2); + + translate([0, -$c/2, 0]) + rotate($beta, [0, 0, 1]) + translate([0, $a/2, 0]) + translate([$bend_offset, 0, 0]) + color("#00ffff") + chamfer(size=chamfer, child_h=height, child_bot=-height/2, shape=chamfer_shape) + partial_ring( + part=$delta/360, + radius=$bend_radius, + thickness=thickness, + height=height + ); + translate([0, $c/2, 0]) + rotate(-$alpha, [0, 0, 1]) + translate([0, -$b/2, 0]) + translate([$bend_offset, 0, 0]) + color("#ff00ff") + chamfer(size=chamfer, child_h=height, child_bot=-height/2, shape=chamfer_shape) + partial_ring( + part=$delta/360, + radius=$bend_radius, + thickness=thickness, + height=height + ); + translate($A) color("#aaaaaa") cylinder(h=height, d=thickness, center=true); + translate($B) color("#bbbbbb") cylinder(h=height, d=thickness, center=true); + translate($C) color("#cccccc") + chamfer(size=chamfer, child_h=height, child_bot=-height/2, shape=chamfer_shape) + cylinder(h=height, d=thickness, center=true); + + if (debug) { + echo("A", $A, "a", $a, "alpha", $alpha); + echo("B", $B, "b", $b, "beta ", $beta); + echo("C", $C, "c", $c, "gamma", $gamma); + echo("bend_factor", bend_factor); + echo("delta:", $delta); + echo("bend_radius", $bend_radius); + echo("bend_offset", $bend_offset); + color("#000000") cylinder(h=4, d=4); + translate($C/2) color("red") cube([$hc, thickness, height*1.1], center=true); + color("red") cube([thickness, $c, height*1.1], center=true); + color("red") translate([0, $c/2, 0]) rotate(-$alpha, [0, 0, 1]) translate([0, -$b/2, 0]) - translate([$bend_offset, 0, 0]) - color("#ff00ff") partial_ring( - part=$delta/360, - radius=$bend_radius, - thickness=thickness, - height=height - ); - translate($A) color("#aaaaaa") cylinder(h=height, d=thickness, center=true); - translate($B) color("#bbbbbb") cylinder(h=height, d=thickness, center=true); - translate($C) color("#cccccc") cylinder(h=height, d=thickness, center=true); - - if (debug) { - echo("A", $A, "a", $a, "alpha", $alpha); - echo("B", $B, "b", $b, "beta ", $beta); - echo("C", $C, "c", $c, "gamma", $gamma); - echo("bend_factor", bend_factor); - echo("delta:", $delta); - echo("bend_radius", $bend_radius); - echo("bend_offset", $bend_offset); - color("#000000") cylinder(h=4, d=4); - translate($C/2) color("red") cube([$hc, thickness, height*1.1], center=true); - color("red") cube([thickness, $c, height*1.1], center=true); - color("red")translate([0, $c/2, 0]) rotate(-$alpha, [0, 0, 1]) translate([0, -$b/2, 0]) cube([thickness,$b, height*1.1], center=true); - color("red")translate([0, -$c/2, 0]) rotate($beta, [0, 0, 1]) translate([0, $a/2, 0]) cube([thickness, $a, height*1.1], center=true); - } + cube([thickness,$b, height*1.1], center=true); + color("red") translate([0, -$c/2, 0]) + rotate($beta, [0, 0, 1]) + translate([0, $a/2, 0]) + cube([thickness, $a, height*1.1], center=true); + } } -module catear_headband(debug=DEBUG, size=SIZE, height=HEIGHT, thickness=THICKNESS, part=PART, stretch_len=STRETCH_LEN, tip_len=TIP_LEN, tip_bend=TIP_BEND, ear_scale=1.5, ear_bend_factor=0.15, ear_stretch_factor=1.2, ear_angle=42) { +module catear_headband(debug=DEBUG, size=SIZE, height=HEIGHT, thickness=THICKNESS, part=PART, stretch_len=STRETCH_LEN, tip_len=TIP_LEN, tip_bend=TIP_BEND, ear_scale=1.5, ear_bend_factor=0.15, ear_stretch_factor=1.2, ear_angle=42, chamfer=CHAMFER, chamfer_shape=CHAMFER_SHAPE) { $a=size/2*ear_scale; $delta=2*(acos($a/(size*2))-90); @@ -69,7 +83,9 @@ module catear_headband(debug=DEBUG, size=SIZE, height=HEIGHT, thickness=THICKNES thickness=thickness, side_len=size/2*ear_scale, bend_factor=ear_bend_factor, - stretch_factor=ear_stretch_factor + stretch_factor=ear_stretch_factor, + chamfer=chamfer, + chamfer_shape=chamfer_shape ); } rotate(-ear_angle, [0, 0, 1]) { @@ -79,7 +95,9 @@ module catear_headband(debug=DEBUG, size=SIZE, height=HEIGHT, thickness=THICKNES thickness=thickness, side_len=size/2*ear_scale, bend_factor=ear_bend_factor, - stretch_factor=ear_stretch_factor + stretch_factor=ear_stretch_factor, + chamfer=chamfer, + chamfer_shape=chamfer_shape ); } headband(