/
knob.js
1288 lines (1160 loc) · 38.9 KB
/
knob.js
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/**
* Copyright (c) 2022 d0st
*
* HomePage: https://www.d0st.me
*
* MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
import * as BABYLON from "babylonjs"
/**
* @typedef {object} SEGMENT
* @property {number} radius
* @property {number} height ratio of 0 - 1 of profiles height
* @property {number} [smoothing]
*/
/**
* @typedef {object} KNOB_BODY_CONFIG
* @property {number} height
* @property {number} [sides]
* @property {SEGMENT[]} segments Atleast one segment is needed.
* This defines the radius of the shape. Also the segments must be
* sorted before a profile can be made
*/
/**
* @typedef {object} KNOB_POINTER_CONFIG
* @property {number} length
* @property {number} height
* @property {number} [angle]
* @property {number} [position]
* @property {number} [radialOffset]
* @property {number} [widthStart] In radians
* @property {number} [widthEnd] In radian
*/
/**
* @typedef {object} ONLY_KNOB_SLOT
* @property {number} [angle]
* @property {SPLINE_CONFIG[]} [splines]
* @property {THREAD_CONFIG[]} [threads]
* @typedef {KNOB_BODY_CONFIG & ONLY_KNOB_SLOT} KNOB_HOLE_CONFIG
*/
/**
* @typedef {object} KNOB_CONFIG
* @property {KNOB_BODY_CONFIG} body
* @property {KNOB_POINTER_CONFIG[]} [pointers]
* @property {KNOB_HOLE_CONFIG} [screwHole]
* @property {SURFACE_CONFIG} [surface]
*/
/**
* @typedef {object} SURFACE_CONFIG
* @property {KNURLING_CONFIG[]} [knurling]
* @property {SPLINE_CONFIG[]} [splines]
* @property {THREAD_CONFIG[]} [threads]
*/
/**
* @typedef {object} KNURLING_CONFIG
* @property {"pyramid"|"rectangle"|"cylinder"|"cone"|"triangle"} [shape]
* @property {number} width
* @property {number} height
* @property {number} depth
* @property {number} columns
* @property {number} [verticalSpacing]
* @property {number} [verticalOffset]
* @property {number} [rise]
* @property {number[]} [range]
* @property {number} [shapeRotation]
* @property {number} [taper]
* @property {boolean} [taperAll]
*/
/**
* @typedef {object} SPLINE_CONFIG
* @property {number} count
* @property {number[]} range
* @property {number} height the height of the tooth radially.
* @property {number} [width] width the width property present, the shape becomes a
* key slot
* @property {number} [thickness]
* @property {number} [rootThickness]
* @property {number} [smoothing]
* @property {number} [topScale=1]
* @property {number} [bottomScale=1]
* @property {number} [scaleSmoothing=0]
* @property {number} [angle=0]
* @property {number} [angleSmoothing=0]
* @property {boolean} [taperWidth]
* @property {boolean} [subtractive=false]
*/
/**
* @typedef {object} THREAD_CONFIG
* @property {number} pitch
* @property {number} depth
* @property {boolean} [leftHanded]
* @property {number[]} range
* @property {number} [taperTop]
* @property {number} [taperBottom]
*/
/**
* @typedef {keyof KNOB_CONFIG|"knurling"|"splines"|"internalSplines"|"threads"|"internalThreads"} UpdateKey
*/
/** one per millimeter */
const TESELLATION = 2
/**
* @typedef {BABYLON.Mesh|BABYLON.InstancedMesh} Mesh
*/
export class KNOB {
/**
* @param {KNOB_CONFIG} config
* @param {BABYLON.Scene} scene
* @param {boolean} [draftMode] Doesn't combine meshes and doesn't perform CSG.
* Meshes will be transuncent to see through. This is mainly for performance reasons
*/
constructor(config, scene, draftMode) {
/** @type {KNOB_CONFIG} */
this.config = JSON.parse(JSON.stringify(config))
this.scene = scene
this.knurlingMeshes = /** @type {Mesh[]} */ ([])
this.surfaceSplines = /** @type {Mesh[]} */ ([])
this.surfaceThreads = /** @type {Mesh[]} */ ([])
this.screwHoleThreads = /** @type {Mesh[]} */ ([])
this.screwHoleSplines = /** @type {Mesh[]} */ ([])
this.pointers = /** @type {Mesh[]} */ ([])
this.draftMode = !!draftMode
this.subtractionMeshes = /** @type {Mesh[]} */ ([])
/** @type {BABYLON.Mesh} */
this.finalShape
this.update(config)
this.setDraftMode(this.draftMode)
}
/**
* @param {KNOB_CONFIG} config
* @param {UpdateKey[]} [partsToUpdate]
* @param {number} [index]
*/
update(config, partsToUpdate, index) {
if (!partsToUpdate || partsToUpdate.length == 0)
partsToUpdate = [
"body", "pointers", "screwHole",
"knurling", "splines", "threads",
]
let bodyUpdated = false
if (partsToUpdate.indexOf("body") + 1) {
this._disposeMesh(this.bodyShape)
Object.assign(this.config.body, config.body)
this.config.body.segments.sort((a, b) => a.height - b.height)
this.bodyShape = this._createBody(this.config.body)
partsToUpdate.push("surface")
partsToUpdate.push("screwHole")
bodyUpdated = true
}
if (partsToUpdate.indexOf("screwHole") + 1) {
Object.assign(this.config.screwHole, config.screwHole)
this.config.screwHole.segments.sort((a, b) => a.height - b.height)
const tempShape = this._createScrewHole(this.config.screwHole)
this._disposeMesh(this.screwHoleShape)
this.screwHoleShape = tempShape
if (this.screwHoleShape)
this._addForSubtraction(this.screwHoleShape)
partsToUpdate.push("internalSplines")
partsToUpdate.push("internalThreads")
}
if (partsToUpdate.indexOf("surface") + 1) {
partsToUpdate.push("knurling")
partsToUpdate.push("splines")
partsToUpdate.push("threads")
}
/**
* @typedef {object} ARRAY_CONFIG
* @property {any} parent
* @property {(c:*) => Mesh} creator
* @property {Mesh[]} stash
* @property {any} source
* @property {string} [key]
*/
/**
* @typedef {"pointers"|"splines"|"knurling"|"internalSplines"|"threads"|"internalThreads"} arrayTypeIndices
*/
/**
* @type {{[key in arrayTypeIndices]: ARRAY_CONFIG}}
*/
const ARR_CONFIGS = {
"pointers": {
"parent": /** @type {any} */ (this.config),
"creator": (c) => this._createPointer(c),
"stash": this.pointers,
"source": config.pointers
},
"splines": {
"parent": this.config.surface,
"creator": (c) => this._createRibbonOn(this.bodyProfile, c),
"stash": this.surfaceSplines,
"source": config.surface.splines
},
"knurling": {
"parent": this.config.surface,
"creator": (c) => this._createKnurling(c),
"stash": this.knurlingMeshes,
"source": config.surface.knurling
},
"internalSplines": {
"parent": this.config.screwHole,
"creator": (c) => this._createRibbonOn(this.screwHoleProfile, c, true),
"stash": this.screwHoleSplines,
"source": config.screwHole.splines,
"key": "splines"
},
"threads": {
"parent": this.config.surface,
"creator": (c) => this._createThreadsOnProfile(this.bodyProfile, c),
"stash": this.surfaceThreads,
"source": config.surface.threads
},
"internalThreads": {
"parent": this.config.screwHole,
"creator": (c) => this._createThreadsOnProfile(this.screwHoleProfile, c, true),
"stash": this.screwHoleThreads,
"source": config.screwHole.threads
},
}
const _this = this
Object.keys(ARR_CONFIGS).forEach(( /** @type {arrayTypeIndices} */ key) => {
if (partsToUpdate.indexOf(key) + 1) {
const creatorInfo = ARR_CONFIGS[key]
const configKey = creatorInfo.key || key
if (index == undefined || !creatorInfo.parent[configKey][index]) {
creatorInfo.parent[configKey] = JSON.parse(JSON.stringify(creatorInfo.source))
creatorInfo.stash.forEach(mesh => _this._disposeMesh(mesh))
creatorInfo.stash.length = 0
creatorInfo.stash.push(...creatorInfo.parent[configKey]
//@ts-ignore
.map(c => creatorInfo.creator(c)))
} else {
Object.assign(creatorInfo.parent[configKey][index], creatorInfo.source[index])
_this._disposeMesh(creatorInfo.stash[index])
creatorInfo.stash[index] = creatorInfo.creator(creatorInfo.parent[configKey][index])
}
}
})
if (bodyUpdated || this.subtractionSetUpdated)
this._performSubtraction()
//for debugging
console.log("Mesh Count:" + this.scene.meshes.length)
}
/**
* Knob is a combination of body, lips and internal stucture
* First create the shape that will make a body
* @param {KNOB_BODY_CONFIG} bodyConfig
* @returns {BABYLON.Mesh}
*/
_createBody(bodyConfig) {
if (bodyConfig.sides < 3)
delete bodyConfig.sides
this.bodyProfile = new Profile(bodyConfig, true)
return BABYLON.MeshBuilder.CreateLathe("baseShape", {
shape: this.bodyProfile.shape,
radius: 0,
tessellation: bodyConfig.sides > 2 ? bodyConfig.sides : null,
closed: true
})
}
/**
* @param {KNOB_HOLE_CONFIG} screwHoleConfig
* @returns {BABYLON.Mesh}
*/
_createScrewHole(screwHoleConfig) {
if (screwHoleConfig && screwHoleConfig.segments.length) {
if (screwHoleConfig.height == undefined)
screwHoleConfig.height = this.bodyProfile.height
if (screwHoleConfig.sides < 3)
delete screwHoleConfig.sides
if (screwHoleConfig.angle == undefined)
screwHoleConfig.angle = 0
this.screwHoleProfile = new Profile(screwHoleConfig)
if (!this.screwHoleProfile.length) {
this.screwHoleProfile = null
return null
}
const mesh = BABYLON.MeshBuilder.CreateLathe("screwHoleShape", {
shape: this.screwHoleProfile.shape,
radius: 0,
tessellation: this.config.screwHole.sides > 2 ?
this.config.screwHole.sides : null,
closed: true,
})
if (screwHoleConfig.angle)
mesh.rotateAround(new BABYLON.Vector3(0, 0, 0),
new BABYLON.Vector3(0, 1, 0), screwHoleConfig.angle)
return mesh
}
return null
}
/**
* fortunately for us, all meshes subtract from the main body
*/
_performSubtraction() {
if (this.finalShape && this.finalShape != this.bodyShape)
this._disposeMesh(this.finalShape)
if (!this.subtractionMeshes.length || this.draftMode) {
if (this.scene.meshes.indexOf(this.bodyShape) == -1) {
this.finalShape = this.bodyShape
this.bodyShape.convertToFlatShadedMesh()
this.scene.addMesh(this.bodyShape)
}
return
}
this.subtractionSetUpdated = false
let outerCSG = BABYLON.CSG.FromMesh(this.bodyShape)
this.scene.removeMesh(this.bodyShape)
for (let i = 0; i < this.subtractionMeshes.length; i++) {
const mesh = this.subtractionMeshes[i]
const innerCSG = BABYLON.CSG.FromMesh(mesh)
this.scene.removeMesh(mesh)
outerCSG = outerCSG.subtract(innerCSG)
}
this.finalShape = outerCSG.toMesh("finalShape", null, this.scene)
this.finalShape.convertToFlatShadedMesh()
}
/**
* @param {KNOB_POINTER_CONFIG} config
* @returns {BABYLON.Mesh}
*/
_createPointer(config) {
if (!config || !config.height)
return null
if (config.angle == undefined)
config.angle = 0
if (config.radialOffset == undefined)
config.radialOffset = 0
if (config.position == undefined)
config.position = 0
if (config.widthEnd == undefined)
config.widthEnd = 0
if (config.widthStart == undefined)
config.widthStart = Math.PI / 10
const p1 = getPointAt(config.angle - config.widthStart / 2, config.radialOffset)
const p2 = getPointAt(config.angle + config.widthStart / 2, config.radialOffset)
const p3 = getPointAt(config.angle + config.widthEnd / 2, config.radialOffset + config.length)
const p4 = getPointAt(config.angle - config.widthEnd / 2, config.radialOffset + config.length)
const y = (this.bodyProfile.height * config.position) - (config.height / 2)
const mesh = BABYLON.MeshBuilder.ExtrudeShape("knobPointer", {
shape: [p1, p2, p3, p4, p1.clone()],
path: [
new BABYLON.Vector3(0, y, 0),
new BABYLON.Vector3(0, y + config.height, 0)
],
cap: BABYLON.Mesh.CAP_ALL
})
mesh.convertToFlatShadedMesh()
return mesh
}
/**
* @param {KNURLING_CONFIG} config
* @returns {Mesh}
*/
_createKnurling(config) {
if (!(config.width && config.height && config.depth))
return null
/** @type {BABYLON.Mesh} */
let baseMesh
if (!config.shape)
config.shape = "pyramid"
if (config.verticalOffset == undefined)
config.verticalOffset = 0
if (config.verticalSpacing == undefined)
config.verticalSpacing = 0
if (config.rise == undefined)
config.rise = 0.9
const halfY = config.height / 2
const halfW = config.width / 2
switch (config.shape) {
case "cone":
case "cylinder":
baseMesh = BABYLON.MeshBuilder.CreateCylinder("baseCylinder", {
diameter: config.width,
height: config.depth,
diameterTop: config.shape == "cone" ? 0 : null,
})
baseMesh.setPivotPoint(new BABYLON.Vector3(0, -config.depth / 2, 0), BABYLON.Space.LOCAL)
baseMesh.rotation.x = Math.PI / 2
break
case "rectangle":
baseMesh = BABYLON.MeshBuilder.ExtrudeShape("baseBox", {
shape: [
new BABYLON.Vector3(-halfW, -halfY, 0),
new BABYLON.Vector3(halfW, -halfY, 0),
new BABYLON.Vector3(halfW, halfY, 0),
new BABYLON.Vector3(-halfW, halfY, 0)
],
closeShape: true,
path: [new BABYLON.Vector3(0, 0, 0), new BABYLON.Vector3(0, 0, config.depth)],
cap: BABYLON.Mesh.CAP_ALL
})
baseMesh.rotation.z = config.shapeRotation || 0
break
case "triangle":
baseMesh = BABYLON.MeshBuilder.ExtrudeShape("baseTraingle", {
shape: [new BABYLON.Vector3(0, halfY, 0),
new BABYLON.Vector3(-halfW, -halfY, 0),
new BABYLON.Vector3(-halfW, -halfY, 0)
],
closeShape: true,
path: [new BABYLON.Vector3(0, 0, 0), new BABYLON.Vector3(0, 0, config.depth)],
cap: BABYLON.Mesh.CAP_ALL
})
baseMesh.convertToFlatShadedMesh()
baseMesh.rotation.z = config.shapeRotation || 0
break
case "pyramid": {
const halfX = config.width / 2
const knurlingShape = {
"name": "Square Pyramid (J1)",
"category": ["Johnson Solid"],
"vertex": [
[-halfX, -halfY, 0],
[-halfX, halfY, 0],
[halfX, halfY, 0],
[halfX, -halfY, 0],
[0, 0, config.depth]
],
"face": [
[1, 4, 2],
[0, 1, 2],
[3, 0, 2],
[4, 3, 2],
[4, 1, 0, 3]
]
}
baseMesh = BABYLON.MeshBuilder.CreatePolyhedron("basePolyHedra", {
custom: knurlingShape
})
baseMesh.rotation.z = config.shapeRotation || 0
break
}
}
baseMesh.position.z = this.bodyProfile.side[0].x -
((1 - config.rise) * config.depth)
const yDist = config.height + config.verticalSpacing
config.columns = Math.min(200, config.columns)
const radialStep = Math.PI * 2 / config.columns
let angle = 0
const verticalAxis = new BABYLON.Vector3(0, 1, 0)
const xAxis = new BABYLON.Vector3(-1, 0, 0)
const center = BABYLON.Vector3.Zero()
let meshID = 0
const parentMesh = new BABYLON.Mesh("knurlingParentMesh")
/** @type {BABYLON.InstancedMesh} */
let referenceMesh
const limitStart = this.bodyProfile.getDistanceAt(config.range[0])
const limitEnd = this.bodyProfile.getDistanceAt(config.range[1])
const yPosLimit = limitEnd - halfY
const range = limitEnd - limitStart
const taperTopPosition = limitEnd - config.taper * range
const taperBottomPosition = limitStart + config.taper * range
const smoothingHeight = this.bodyProfile.height * (config.taper || 0)
for (let j = 0; j < config.columns; j++) {
let slot = 0
let yPos = limitStart + halfY + ((j * config.verticalOffset) % yDist)
const scaleMap = /** @type {number[]} */ ([])
const slopeHeightMap = /** @type {{angle:number,y:number,x:number}[]} */ ([])
while (yPos <= yPosLimit) {
while (yPos > this.bodyProfile.lengthMap[slot])
slot++
slopeHeightMap.push(this.bodyProfile.getInfoAt(yPos, slot - 1))
let scale = 1
if (smoothingHeight) {
if (yPos < taperBottomPosition)
scale = Math.min(1, (yPos - limitStart) / smoothingHeight)
else if (yPos > taperTopPosition)
scale = Math.min(1, (limitEnd - yPos) / smoothingHeight)
}
scaleMap.push(scale)
yPos += yDist
}
for (let i = 0; i < slopeHeightMap.length; i++) {
const t = baseMesh.createInstance(baseMesh.name + meshID++)
t.position.y = slopeHeightMap[i].y
t.position.z = slopeHeightMap[i].x -
((1 - config.rise) * config.depth)
t.rotateAround(
new BABYLON.Vector3(0, t.position.y, t.position.z),
xAxis,
slopeHeightMap[i].angle
)
t.rotateAround(center, verticalAxis, angle)
t.setParent(parentMesh)
if (config.taperAll)
t.scaling.scaleInPlace(scaleMap[i])
else if (config.shape == "cone" || config.shape == "cylinder")
t.scaling.y = scaleMap[i]
else
t.scaling.z = scaleMap[i]
referenceMesh = t
}
angle += radialStep
}
if (!referenceMesh) {
parentMesh.dispose()
baseMesh.dispose()
return null
}
copyTransform(baseMesh, referenceMesh)
baseMesh.setParent(parentMesh)
referenceMesh.dispose()
return parentMesh
}
/**
* @param {Profile} profile
* @param {SPLINE_CONFIG} config
* @param {boolean} [internal]
* @returns {BABYLON.Mesh}
*/
_createRibbonOn(profile, config, internal = false) {
if (!profile || config.count < 1 || (!config.height && !config.width))
return null
const start = profile.getDistanceAt(config.range[0])
const end = profile.getDistanceAt(config.range[1])
const absYStart = config.range[0] * profile.height
const absYEnd = config.range[1] * profile.height
if (config.topScale == undefined)
config.topScale = 1
if (config.bottomScale == undefined)
config.bottomScale = 1
if (config.scaleSmoothing == undefined)
config.scaleSmoothing = 0
if (config.angle == undefined)
config.angle = 0
if (config.angleSmoothing == undefined)
config.angleSmoothing = 0
if (config.rootThickness == undefined)
config.rootThickness = config.thickness
//zero causes weird artifacts
if (config.topScale == 0)
config.topScale = 0.001
if (config.bottomScale == 0)
config.bottomScale = 0.001
let oppSmoothing = config.scaleSmoothing < 0
config.scaleSmoothing = Math.abs(config.scaleSmoothing)
let oppAngleSmoothing = config.angleSmoothing < 0
config.angleSmoothing = Math.abs(config.angleSmoothing)
const tessellations = Math.ceil((end - start) * TESELLATION)
const distanceStep = (end - start) / tessellations
let currentD = start
const midSection = (absYEnd + absYStart) / 2
const shapes = []
const angleStep = Math.abs(config.angle / tessellations)
let pathRotation = 0
const shapeFn = config.width ? this._createKeyProfile : this._createSplineProfile
const isInward = !internal != !config.subtractive
for (let i = 0; i <= tessellations; i++) {
const dInfo = profile.getInfoAt(currentD)
let dScale = 1
if (dInfo.y >= midSection) {
const ratio = Math.min(1, (dInfo.y - midSection) / (absYEnd - midSection))
dScale += (config.topScale - 1) * smooth(ratio, config.scaleSmoothing, oppSmoothing)
} else {
const ratio = Math.max(0, (dInfo.y - midSection) / (absYStart - midSection))
dScale += (config.bottomScale - 1) * smooth(ratio, config.scaleSmoothing, oppSmoothing)
}
currentD += distanceStep
const currentAngle = config.angle * smooth(pathRotation,
config.angleSmoothing,
oppAngleSmoothing)
pathRotation += angleStep
const widthScale = config.taperWidth ? dScale : 1
shapes[i + 1] = shapeFn({
rootThickness: config.rootThickness * widthScale,
tipThickness: config.thickness * widthScale,
width: config.width * widthScale,
height: config.height * dScale,
radius: dInfo.x,
smoothing: config.smoothing,
yPos: dInfo.y,
offset: currentAngle,
inward: isInward
})
}
shapes[0] = centerArr(shapes[1])
shapes.push(centerArr(shapes[shapes.length - 1]))
const baseMesh = BABYLON.MeshBuilder.CreateRibbon("baseSplineStructure" + Math.random(), {
pathArray: shapes,
sideOrientation: isInward ? null : BABYLON.Mesh.BACKSIDE
})
const radialStep = 2 * Math.PI / config.count
let currentAngle = 0
const verticalAxis = new BABYLON.Vector3(0, 1, 0)
const zero = new BABYLON.Vector3(0, 0, 0)
for (let i = 1; i < config.count; i++) {
currentAngle += radialStep
const instance = baseMesh.createInstance(baseMesh.name + i)
instance.rotateAround(zero, verticalAxis, currentAngle)
instance.setParent(baseMesh)
}
if (config.subtractive)
this._addForSubtraction(baseMesh)
else
baseMesh.convertToFlatShadedMesh()
return baseMesh
}
/**
* @typedef {object} Surface_Shape_Config
* @property {number} radius
* @property {number} height
* @property {number} yPos
* @property {number} [width]
* @property {number} [offset] Angular offset
* @property {number} [smoothing]
* @property {number} [rootThickness]
* @property {number} [tipThickness]
* @property {boolean} [inward]
*/
/**
* @param {Surface_Shape_Config} c
* @returns {BABYLON.Vector3[]}
*/
_createSplineProfile(c) {
/** 3 every mm */
//const tessellations = 3
const profile = /** @type {BABYLON.Vector3[]} */ ([])
/**
* @param {number} angle
* @param {number} r
* @returns {BABYLON.Vector3}
*/
function getPointAtMod(angle, r) {
const p = getPointAt(angle, r)
p.z = p.y
p.y = c.yPos
return p
}
const numBasePoints = 18 //Math.round(r * rb * tessellations)
let arcStep = c.rootThickness / numBasePoints
let currentStep = -c.rootThickness / 2 + c.offset
const h = c.inward ? -c.height : c.height
for (let i = 0; i <= numBasePoints; i++) {
let correctedR = c.radius
//This so that there is no gap between the surface and the spline structure
if (i % numBasePoints != 0)
correctedR = c.radius + ((h > 0 ? -c.radius : c.radius) / 10)
profile.push(getPointAtMod(currentStep, correctedR))
currentStep += arcStep
}
const numSidePoints = 18 //Math.round(r * (Math.abs(rt - rb) / 2) * tessellations)
arcStep = (c.tipThickness - c.rootThickness) / (2 * numSidePoints)
currentStep = (c.rootThickness / 2) + c.offset
let currentHeight = 0
const heightStep = h / numSidePoints
const oppDir = c.smoothing > 0 ? false : true
c.smoothing = Math.abs(c.smoothing) || 0
for (let i = 0; i < numSidePoints - 1; i++) {
currentStep += arcStep
currentHeight += heightStep
const ch = h * smooth(currentHeight / h, c.smoothing, oppDir)
profile.push(getPointAtMod(currentStep, c.radius + ch))
}
const numTipPoints = 18 //Math.round((r + h) * rt * tessellations)
arcStep = -c.tipThickness / numTipPoints
currentStep = (c.tipThickness / 2) + c.offset
for (let i = 0; i <= numTipPoints; i++) {
profile.push(getPointAtMod(currentStep, c.radius + h))
currentStep += arcStep
}
arcStep = -(c.tipThickness - c.rootThickness) / (2 * numSidePoints)
currentStep = -(c.tipThickness / 2) + c.offset
currentHeight = h
for (let i = 0; i < numSidePoints - 1; i++) {
currentStep -= arcStep
currentHeight -= heightStep
const ch = h * smooth(currentHeight / h, c.smoothing, oppDir)
profile.push(getPointAtMod(currentStep, c.radius + ch))
}
profile.push(profile[0].clone())
return profile
}
/**
* Key is similar to Spline profile except that the width is constant radially extending outward
* @param {Surface_Shape_Config} c
* @returns {BABYLON.Vector3[]}
*/
_createKeyProfile(c) {
const profile = /** @type {BABYLON.Vector3[]} */ ([])
/**
* @param {number} t
* @param {number} r
* @returns {BABYLON.Vector3}
*/
const getPoint = (t, r) => new BABYLON.Vector3(Math.sin(t) * r, c.yPos, Math.cos(t) * r)
c.width = Math.min(c.width, c.radius * 2)
const hw = c.width / 2
const theta = Math.PI / 2 - Math.asin(hw / c.radius)
const theta2 = Math.PI - theta
const numBasePoints = 18 //Math.round(r * rb * tessellations)
let arcStep = (theta2 - theta) / numBasePoints
let currentStep = theta
for (let i = 0; i <= numBasePoints; i++) {
let correctedR = c.radius
//This so that there is no gap between the surface and the spline structure
if (i % numBasePoints != 0)
correctedR += ((c.inward ? c.radius : -c.radius) / 10)
profile.push(getPoint(currentStep, correctedR))
currentStep += arcStep
}
let h = c.height || 0
if (c.inward)
h = -Math.max(h, c.radius - Math.sqrt((c.radius * c.radius) - (hw * hw)))
const zPosMax = profile[profile.length - 1].z
profile.push(new BABYLON.Vector3((c.radius + h), c.yPos, zPosMax))
profile.push(new BABYLON.Vector3((c.radius + h), c.yPos, -zPosMax))
/**
* @param {BABYLON.Vector3} p
*/
function rotatePoint(p) {
const x = p.x
const z = p.z
p.x = x * Math.cos(c.offset) - z * Math.sin(c.offset)
p.z = x * Math.sin(c.offset) + z * Math.cos(c.offset)
}
if (c.offset)
profile.forEach(rotatePoint)
profile.push(profile[0].clone())
return profile
}
/**
* @param {Profile} profile
* @param {THREAD_CONFIG} config
* @param {boolean} [internal]
* @returns {BABYLON.Mesh}
*/
_createThreadsOnProfile(profile, config, internal) {
if (!profile || !config.pitch || config.depth === 0)
return null
const fcsh = config.pitch / 16
const adjustment = config.pitch / 2 - fcsh
const absYStart = profile.getInfoAt((profile.getDistanceAt(config.range[0]) + adjustment)).y
const absYEnd = profile.getInfoAt((profile.getDistanceAt(config.range[1]) - adjustment)).y
const depth = config.depth || config.pitch * 5 * Math.sqrt(3) / 16
//tessellation on each turn will depend upon radius at height
let currentY = absYStart
const range = absYEnd - absYStart
const taperTopPosition = absYEnd - config.taperTop * range
const taperBottomPosition = absYStart + config.taperBottom * range
const paths = /** @type {BABYLON.Vector3[][]} */ ([])
let currentAngle = 0
let yStep, radialStep, angleStep, currentRadius, tessellations, currentStep = 0
let pathIndex = 1
while (currentY < absYEnd) {
if (currentStep == 0) {
const infoStep1 = profile.getInfoAt(currentY)
const infoStep2 = profile.getInfoAt(currentY + config.pitch)
const mean = (infoStep1.x + infoStep2.x) / 2
tessellations = Math.round(2 * Math.PI * mean * TESELLATION)
yStep = config.pitch / tessellations
radialStep = (infoStep2.x - infoStep1.x) / tessellations
angleStep = 2 * Math.PI / tessellations
currentRadius = infoStep1.x
if (config.leftHanded) {
angleStep = -angleStep
currentAngle = 2 * Math.PI
} else
currentAngle = 0
}
const point = getPointAt(currentAngle, currentRadius)
point.z = point.y
point.y = currentY
let scale = 1
if (currentY >= taperTopPosition)
scale = (absYEnd - currentY) / (absYEnd - taperTopPosition)
else if (currentY <= taperBottomPosition)
scale = (currentY - absYStart) / (taperBottomPosition - absYStart)
paths[pathIndex++] = this._createThreadProfile(config.pitch * scale,
depth * scale, currentRadius, currentAngle, currentY,
profile.getInfoAt(profile.getDistanceAt(currentY / profile.height)).angle,
internal)
currentY += yStep
currentRadius += radialStep
currentAngle += angleStep
currentStep += 1
if (currentStep == tessellations)
currentStep = 0
}
paths[0] = centerArr(paths[1])
paths[pathIndex] = centerArr(paths[pathIndex - 1])
const threads = BABYLON.MeshBuilder.CreateRibbon("thread", {
pathArray: paths,
sideOrientation: !config.leftHanded != !internal ? BABYLON.Mesh.BACKSIDE : BABYLON.Mesh.DEFAULTSIDE
})
threads.convertToFlatShadedMesh()
return threads
}
/**
* !!What about threads on inclined surfaces?
*
* @param {number} pitch
* @param {number} depth
* @param {number} br base Radius
* @param {number} angle
* @param {number} yPos
* @param {boolean} [internal]
* @param {number} slope
* @returns {BABYLON.Vector3[]}
*/
_createThreadProfile(pitch, depth, br, angle, yPos, slope, internal) {
const path = /** @type {BABYLON.Vector3[]} */ ([])
const directionPoint = new BABYLON.Vector3(Math.cos(angle), 0, Math.sin(angle))
const direction = internal ? -1 : 1
const fcsh = pitch / 16
const frs = pitch / 4
const ascentLength = (pitch - (fcsh * 2) - frs) / 2
let y = yPos - (pitch / 2) + fcsh
const point1 = directionPoint.scale(br)
point1.y = y
y += ascentLength
const point2 = directionPoint.scale((br + (direction * depth)))
point2.y = y
y += frs
const point3 = point2.clone()
point3.y = y
y += ascentLength
const point4 = point1.clone()
point4.y = y
path.push(point1, point2, point3, point4)
path.push(path[0].clone())
return path
}
dispose() {
this._disposeMesh(this.finalShape)
this._disposeMesh(this.screwHoleShape)
this._disposeMesh(this.bodyShape)
const _this = this
this.surfaceSplines.forEach(mesh => _this._disposeMesh(mesh))
this.screwHoleSplines.forEach(mesh => _this._disposeMesh(mesh))
this.knurlingMeshes.forEach(mesh => _this._disposeMesh(mesh))
this.pointers.forEach(mesh => _this._disposeMesh(mesh))
this.surfaceThreads.forEach(mesh => _this._disposeMesh(mesh))
this.screwHoleThreads.forEach(mesh => _this._disposeMesh(mesh))
}
/**
* @param {Mesh} mesh
*/
_disposeMesh(mesh) {
if (!mesh)
return
mesh.dispose()
if (this.subtractionMeshes.length) {
const indexInSubtractionList = this.subtractionMeshes.indexOf(mesh)
if (indexInSubtractionList != -1) {
this.subtractionMeshes.splice(indexInSubtractionList, 1)
this.subtractionSetUpdated = true
}
}
}
/**
* @param {Mesh} mesh
*/
_addForSubtraction(mesh) {
this.subtractionMeshes.push(mesh)
const _this = this
mesh.getChildMeshes().forEach(( /** @type {Mesh} */ mesh) => _this._addForSubtraction(mesh))
this.subtractionSetUpdated = true
}
/**
* Altered from babylonJSSerializer's ExportSTL because
* that doesn't support Instanced Meshes
* @param {boolean} [download]
* @returns {string} The stl as plain string
*/
exportSTL(download) {
/**
* @param {BABYLON.IndicesArray} indices
* @param {BABYLON.FloatArray} vertices
* @param {number} i
* @returns {{v: BABYLON.Vector3[], n: BABYLON.Vector3}}
*/
let getFaceData = function(indices, vertices, i) {
let id = [indices[i] * 3, indices[i + 1] * 3, indices[i + 2] * 3]
let v = [
new BABYLON.Vector3(vertices[id[0]], vertices[id[0] + 2], vertices[id[0] + 1]),
new BABYLON.Vector3(vertices[id[1]], vertices[id[1] + 2], vertices[id[1] + 1]),
new BABYLON.Vector3(vertices[id[2]], vertices[id[2] + 2], vertices[id[2] + 1]),
]
let p1p2 = v[0].subtract(v[1])
let p3p2 = v[2].subtract(v[1])
let n = BABYLON.Vector3.Cross(p3p2, p1p2).normalize()