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add more gear parameters, better dialog

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This commit is contained in:
Stewart Allen 2024-07-19 12:43:13 -04:00
commit 0b69cfdc7e
6 changed files with 56 additions and 46 deletions
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52
src/mesh/api.js
View file

@ -321,14 +321,18 @@ let add = {
},
gear(opt = {}) {
function gengear(teeth, module, angle, twist, shaft) {
function gengear(bound) {
console.log({ bound });
const { _teeth, _module, _angle, _twist, _shaft, _offset, _height } = bound;
api.modal.hide();
worker.model_gen_gear({
teeth: parseInt(teeth),
module: parseFloat(module),
angle: parseFloat(angle),
twist: parseFloat(twist),
shaft: parseFloat(shaft),
teeth: parseInt(_teeth.value),
module: parseFloat(_module.value),
angle: parseFloat(_angle.value),
twist: parseFloat(_twist.value),
shaft: parseFloat(_shaft.value),
offset: parseFloat(_offset.value),
height: parseFloat(_height.value),
}).then(gear => {
const nmdl = new mesh.model({ file: "gear", mesh: gear.toFloat32() });
const ngrp = group.new([ nmdl ]);
@ -339,27 +343,27 @@ let add = {
title: "gear generator",
body: [ h.div({ class: "addgear" }, [
h.label('number of teeth'),
h.input({ value: opt.teeth || 20, size: 5, id: "gteeth" }),
h.label('module (diam / teeth)'),
h.input({ value: opt.module || 3, size: 5, id: "gmodule" }),
h.label('pressure angle'),
h.input({ value: opt.angle || 20, size: 5, id: "gangle" }),
h.label('twist angle'),
h.input({ value: opt.twist || 0, size: 5, id: "gtwist" }),
h.input({ value: opt.teeth || 20, size: 5, id: "_teeth" }),
h.label('shaft diameter'),
h.input({ value: opt.shaft || 5, size: 5, id: "gshaft" }),
h.button({ _: "create", onclick() {
gengear(
api.modal.bound.gteeth.value,
api.modal.bound.gmodule.value,
api.modal.bound.gangle.value,
api.modal.bound.gtwist.value,
api.modal.bound.gshaft.value,
)
} })
h.input({ value: opt.shaft || 5, size: 5, id: "_shaft" }),
h.label('z height'),
h.input({ value: opt.height || 15, size: 5, id: "_height" }),
h.hr(),
h.code("all other settings must"),
h.code("match for gears to mesh"),
h.hr(),
h.label('module (diam / teeth)'),
h.input({ value: opt.module || 3, size: 5, id: "_module" }),
h.label('pressure angle'),
h.input({ value: opt.angle || 20, size: 5, id: "_angle" }),
h.label('twist angle (helix)'),
h.input({ value: opt.twist || 0, size: 5, id: "_twist" }),
h.label('tooth offset (play)'),
h.input({ value: opt.offset || 0.1, size: 5, id: "_offset" }),
h.button({ _: "create", onclick() { gengear(api.modal.bound) } })
]) ]
});
api.modal.bound.gteeth.focus();
api.modal.bound._teeth.focus();
}
};

2
src/mesh/build.js
View file

@ -375,7 +375,7 @@ function ui_build() {
h.div({ class: "pop"}, [
h.button({ _: 'cylinder', onclick: add.cylinder }),
h.button({ _: 'cube', onclick: add.cube }),
h.button({ _: 'gear', onclick: add.gear }),
h.button({ _: 'gear', onclick() { add.gear() } }),
devel ? h.button({ _: 'input', onclick: add.input }) : undefined
])
]),

18
src/mesh/tool.js
View file

@ -740,7 +740,7 @@ mesh.tool = class MeshTool {
// returns points array for a polygon
// extrusion and twist is handled in work.js
generateGear(numTeeth, module, pressureAngle) {
generateGear(numTeeth, module, pressureAngle, offset) {
// Adapted from: Public Domain Parametric Involute Spur Gear by Leemon Baird, 2011, Leemon@Leemon.com http://www.thingiverse.com/thing:5505
// see also http://grabcad.com/questions/tutorial-how-to-model-involute-gears-in-solidworks-and-show-design-intent
@ -787,10 +787,11 @@ mesh.tool = class MeshTool {
// gear parameter setup
let mm_per_tooth = module * pi; // mm size of one gear tooth
let clearance = 0.1; // freedom between two gear centers
let backlash = 0.1; // freedom between two gear contact points
let clearance = offset/2 || 0; // freedom between two gear centers
let backlash = offset || 0; // freedom between two gear contact points
let pressure_angle = degrees_to_radians(pressureAngle);
let gear = [];
let pitch;
// involute gear maker
{
@ -800,24 +801,27 @@ mesh.tool = class MeshTool {
let r = p - (c - p) - clearance; // radius of root circle
let t = mm_per_tooth / 2 - backlash / 2; // tooth thickness at pitch circle
let k = -iang(b, p) - t / 2 / p; // angle where involute meets base circle on side of tooth
let f = 10 + ((p/5) | 0); // increase number of tooth curve points on larger gears
let points = [ // [x,y] points for a single gear tooth
polar(r, -pi / numTeeth),
polar(r, r < b ? k : -pi / numTeeth),
...qf(10, r, b, c, k, 1),
...qf(10, r, b, c, k, -1).reverse(),
...qf(f, r, b, c, k, 1),
...qf(f, r, b, c, k, -1).reverse(),
polar(r, r < b ? -k : pi / numTeeth),
// polar(r, 3.142 / numTeeth) // omit b/c overlaps start when rotated
];
console.log({ p, f });
// create all gear teeth by rotating the first tooth
for (var i = 0; i < numTeeth; i++) {
gear.appendAll(rotate(points, -i * 2 * pi / numTeeth));
}
mesh.log(`gear pitch radius: ${p.round(3)}`);
pitch = p.round(3);
mesh.log(`gear pitch radius: ${pitch}`);
}
return gear;
return { gear, pitch };
}
};

21
src/mesh/work.js
View file

@ -401,21 +401,18 @@ let model = {
},
gen_gear(data, send) {
const { teeth, module, angle, twist, shaft, z } = data;
let points = new mesh.tool()
.generateGear(teeth, module, angle)
.map(v => [...v, 0]).flat();
let poly = newPolygon().addVerts(points);
const { teeth, module, angle, twist, shaft, offset, height } = data;
const { gear, pitch } = new mesh.tool().generateGear(teeth, module, angle, offset);
const points = gear.map(v => [...v, 0]).flat();
const poly = newPolygon().addVerts(points);
if (shaft) {
poly.addInner(
newPolygon().centerCircle({
x:0, y:0, z:0
}, shaft / 2, Math.min(20 + shaft,100))
);
const nump = Math.min(30 + shaft, 150);
const srad = shaft / 2;
poly.addInner( newPolygon().centerCircle({ x:0, y:0, z:0 }, srad, nump) );
}
let verts = poly.extrude(z || 15);
const verts = poly.extrude(height || 15);
if (twist) {
let rad = base.util.toRadians(twist);
const rad = base.util.toRadians(twist);
for (let i=0; i<verts.length; i += 3) {
if (Math.abs(verts[i+2]) < 0.001) {
let [x, y] = base.util.rotate(

2
src/moto/webui.js
View file

@ -139,7 +139,7 @@ gapp.overlay(root, {
// add common element types
[
"a", "i", "hr", "div", "span", "label", "input",
"a", "i", "hr", "div", "pre", "code", "span", "label", "input",
"button", "svg", "textarea", "select", "option"
].forEach(type => {
h[type] = (attr, innr) => {

9
web/mesh/index.css
View file

@ -235,8 +235,13 @@ button:hover {
grid-template-columns: 1fr 50px;
}
.addgear button {
column-span: all;
.addgear hr {
width: 100%;
}
.addgear button, .addgear hr, .addgear code {
grid-column: span 2;
text-align: center;
}
.image-import {