轴的创建参考的 坐标轴创建 参考的这个, 感谢大哥分享
上图! 效果
1. 创建轴
- 父对象
export default class Axis {
/**
* 实体
* @type {Cesium.Primitive}
*/
primitive = null
/**
* 选中状态
* @type {boolean}
*/
selected = false
/**
* 轴的颜色
* @type {Cesium.Color}
* @private
*/
_color = null
/**
* 平移
* @param moveVector{Cesium.Cartesian3} 移动距离
* @param unit
* @param moveLength
*/
translation(moveVector, unit, moveLength){
Cesium.Matrix4.multiplyByTranslation(
this.primitive.modelMatrix,
Cesium.Cartesian3.multiplyByScalar(unit, moveLength, new Cesium.Cartesian3()),
this.primitive.modelMatrix
)
}
/**
* 旋转轴
* @param {Cesium.Matrix4} rotation
*/
rotationAxis(rotation){
Cesium.Matrix4.multiply(
this.primitive.modelMatrix,
rotation,
this.primitive.modelMatrix,
)
}
/**
* 旋转
* @param rotationX{Cesium.Matrix4} 旋转角度
*/
rotation (rotationX) {
this.instance = []
if (this.primitive.geometryInstances.constructor === Array) {
this.instance = this.primitive.geometryInstances
} else {
this.instance = [this.primitive.geometryInstances]
}
for (let i = 0; i < this.instance.length; i++) {
Cesium.Matrix4.multiply(
this.instance[i].modelMatrix,
rotationX,
this.instance[i].modelMatrix
)
}
}
// 复位颜色
rest () {
this.selected = false
this.primitive.appearance.material.uniforms.color = this._color
}
// 选中
select () {
this.selected = true
this.primitive.appearance.material.uniforms.color = Cesium.Color.WHITE
}
/**
* 是否是当前轴
* @param id
* @return {boolean}
*/
is (id) {
return !!this.primitive._instanceIds.find(item => item === id)
}
}
- 平移轴
import Axis from './Axis'
export default class ArrowPolyline extends Axis {
/**
* 方向
* @type {Cesium.Cartesian3}
*/
direction = null
/**
* 哪个轴
* @type {Cartesian3}
*/
unit = null
/**
* 箭头线
*/
constructor(option = {}) {
super()
this._color = option.color || Cesium.Color.RED;
this._width = option.width || 3;
this._headWidth = option.headWidth || 2 * this._width;
this._length = option.length || 300
this._headLength = option.headLength || 10
this._inverse = option.inverse || false
this.position = option.position
this.direction = option.direction
this.unit = option.unit
const id = option.id
//这里用的是圆锥几何对象，当topRadius和bottomRadius相同时，它就是一个圆柱
const line = Cesium.CylinderGeometry.createGeometry(new Cesium.CylinderGeometry({
length: this._length,
topRadius: this._width,
bottomRadius: this._width
}));
const arrow = Cesium.CylinderGeometry.createGeometry(new Cesium.CylinderGeometry({
length: this._headLength,
topRadius: 0,
bottomRadius: this._headWidth
}));
let offset = (this._length + this._headLength) / 2
if (this._inverse) {
offset = -offset
}
this.translate(arrow, [0, 0, offset]);
const modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(this.position)
this.primitive = new Cesium.Primitive({
modelMatrix: modelMatrix,
geometryInstances: [new Cesium.GeometryInstance(
{
id: id + '-line',
geometry: line,
}
),
new Cesium.GeometryInstance({
id: id + '-arrow',
geometry: arrow,
})],
appearance: new Cesium.MaterialAppearance({
material: Cesium.Material.fromType('Color', { color: this._color })
}),
asynchronous: false
});
}
/**
* 按上面的方法画出的箭头在线的中间，我们需要把它平移到线的一端
*/
translate (geometry, offset) {
const scratchOffset = new Cesium.Cartesian3();
if (Array.isArray(offset)) {
scratchOffset.x = offset[0];
scratchOffset.y = offset[1];
scratchOffset.z = offset[2];
} else {
Cesium.Cartesian3.clone(offset, scratchOffset);
}
for (let i = 0; i < geometry.attributes.position.values.length; i += 3) {
geometry.attributes.position.values[i] += scratchOffset.x;
geometry.attributes.position.values[i + 1] += scratchOffset.y;
geometry.attributes.position.values[i + 2] += scratchOffset.z;
}
}
}
- 旋转轴
import Axis from './Axis'
export default class AxisSphere extends Axis {
id = ''
/**
* 轴位置
* @type {[]}
*/
position = []
/**
* 方向
* @type {Cesium.Cartesian3}
*/
direction = null
/**
* 轴的角度
* @type {number}
*/
angle = 0
/**
* 构造一个旋转轴
* @param id{string} id
* @param radius{number} 半径
* @param position{Cesium.Cartesian3} 位置
* @param color{Cesium.Color} 颜色
*/
constructor (id, radius, position, color) {
super()
this.id = id
this._color = color
this._calculation(radius, position)
this._createAxisSphere(id, position, color)
}
/**
* 创建圆环轴
* @param id{string} id
* @param matrix{Cesium.Cartesian3} 位置
* @param color{Cesium.Color} 颜色
* @private
*/
_createAxisSphere(id, position, color) {
const matrix = Cesium.Transforms.eastNorthUpToFixedFrame(position)
const geometry = new Cesium.PolylineGeometry({
positions: this.position,
width: 10
});
const instance = new Cesium.GeometryInstance({
geometry: geometry,
id: id,
attributes: {
color: Cesium.ColorGeometryInstanceAttribute.fromColor(color)
}
});
this.primitive = new Cesium.Primitive({
geometryInstances: instance,
appearance: new Cesium.PolylineColorAppearance({
translucent: false
}),
modelMatrix: matrix
});
}
/**
* 计算轴圆弧位置
* @param radius{number}
*/
_calculation (radius, position) {
for (let i = 0; i <= 360; i += 3) {
const sin = Math.sin(Cesium.Math.toRadians(i));
const cos = Math.cos(Cesium.Math.toRadians(i));
const x = radius * cos;
const y = radius * sin;
this.position.push(new Cesium.Cartesian3(x, y, 0));
}
}
/**
* 更新轴的角度
* @param angle
*/
updateAngle(angle) {
this.angle += angle
if(this.angle >= 360 || this.angle <= 360) {
this.angle = 0
}
}
/**
* 选中
*/
select () {
this.selected = true
}
// 复位颜色
rest () {
this.selected = false
}
}
2. 功能控制
- 难点主要是两个, 旋转时轴怎么计算角度, 这里采用 向量向平面投影, 然后计算角度, 上代码块
export const rayPlaneIntersection = (ray, cameraDirection, pickPoint, result = new Cesium.Cartesian3()) => {
if (!pickPoint) {
throw new Error("cuowu")
return
}
// 获取相机到左键按下时的向量长度
const number = Cesium.Cartesian3.dot(cameraDirection, pickPoint);
// cameraDirection 在拾取到的位置的投影
const number1 = Cesium.Cartesian3.dot(cameraDirection, ray.origin);
const number2 = Cesium.Cartesian3.dot(cameraDirection, ray.direction);
const t = (number - number1) / number2
return Cesium.Cartesian3.add(ray.origin, Cesium.Cartesian3.multiplyByScalar(ray.direction, t, result), result)
}
- 旋转以后, 怎么获得角度方向, 这里采用叉积, 然后计算平面法线的法向量和叉积结果的向量角度
let cartesian3 = this.viewer.baseViewer.scene.pickPosition(e.message.startPosition)
Cesium.Cartesian3.subtract(cartesian3, this.position, cartesian3)
const vtStart = projectOnPlane(cartesian3, axis.direction)
cartesian3 = this.viewer.baseViewer.scene.pickPosition(e.message.endPosition)
Cesium.Cartesian3.subtract(cartesian3, this.position, cartesian3)
const vtEnd = projectOnPlane(cartesian3, axis.direction)
const cartesian = Cesium.Cartesian3.cross(vtStart, vtEnd, new Cesium.Cartesian3())
const angle = Cesium.Math.toDegrees(Cesium.Cartesian3.angleBetween(cartesian, axis.direction))
// 利用叉乘性质判断方向
let rotateAngleInRadians = Cesium.Cartesian3.angleBetween(vtEnd, vtStart)
if (angle > 1) {
rotateAngleInRadians = -rotateAngleInRadians
}
上整个控制器代码 有用的话 点个赞哦 里面的viewer 是我自己封装的对象, eventManager 你需要自己处理
import ArrowPolyline from '../model/ArrowPolyline'
import EventConstant from '../constant/EventConstant'
import { cartesian3ToQuaternion, normalizingQuaternion, projectOnPlane, rayPlaneIntersection } from './math'
import AxisSphere from '../model/AxisSphere'
import CesiumUtils from '../utils/CesiumUtils'
export default class TranslationController {
/**
* 视图
* @type {Viewer}
*/
viewer = null
/**
* 模型
* @type {Cesium.Model}
*/
model = null
/**
* 模型位置
* @type {Cesium.Cartesian3}
*/
position = null
/**
* z轴
* @type {ArrowPolyline}
*/
axisZ = null
/**
* x轴
* @type {ArrowPolyline}
*/
axisX = null
/**
* y轴
* @type {ArrowPolyline}
*/
axisY = null
/**
* 操作杆集合
* @type {Cesium.PrimitiveCollection}
*/
primitives = null
/**
* 从摄像头发出与视窗上一点相交的射线
*/
pickRay = new Cesium.Ray()
/**
* 拾取到的位置
* @type {Cesium.Cartesian3}
*/
pickPoint = null
/**
* 当前操作轴
* @type {ArrowPolyline}
*/
axis = null
/**
* Z旋转轴
* @type {AxisSphere}
*/
axisSphereZ = null
/**
* X旋转轴
* @type {AxisSphere}
*/
axisSphereX = null
/**
* Y旋转轴
* @type {AxisSphere}
*/
axisSphereY = null
/**
* 辅助球
* @type {Cesium.Primitive}
*/
auxiliaryBall = null
constructor (viewer, model) {
this.viewer = viewer
this.model = model
this.position = Cesium.Matrix4.getTranslation(
model.modelMatrix,
new Cesium.Cartesian3()
)
this.primitives = new Cesium.PrimitiveCollection()
this.viewer.baseViewer.scene.primitives.add(this.primitives)
// 创建平移轴
this._createRod()
// 旋转平移轴
this._rotationRod()
// 添加平移轴
this._addRod()
// 创建旋转轴
this._createSphereAxis()
// 旋转旋转轴
this._rotationSphereAxis()
// 添加旋转轴
this._addSphereAxis()
// 添加辅助球
this.addAuxiliaryBall(6, Cesium.Color.RED.withAlpha(0.2))
// 添加监听器
this._addListener()
}
// 添加监听器
_addListener () {
this.viewer.eventManager.addEventListener(EventConstant.LEFT_DOWN, this._clickListener)
this.viewer.eventManager.addEventListener(EventConstant.LEFT_UP, this._clickUpListener)
this.viewer.eventManager.addEventListener(EventConstant.MOUSE_MOVE, this._moveListener)
}
// 清除操纵杆, 监听器
destroy () {
this.primitives.removeAll()
this.viewer.baseViewer.scene.primitives.remove(this.primitives)
this._removeListener()
}
// 移除监听器
_removeListener () {
this.viewer.eventManager.removeEventListener(EventConstant.LEFT_DOWN, this._clickListener)
this.viewer.eventManager.removeEventListener(EventConstant.LEFT_UP, this._clickUpListener)
this.viewer.eventManager.removeEventListener(EventConstant.MOUSE_MOVE, this._moveListener)
}
// 创建操作杆
_createRod () {
const boundingShpere = this.model.boundingSphere
const radius = boundingShpere.radius
const options = {
width: radius / 15,
headWidth: radius / 6,
length: radius * 5,//坐标轴的长度应该视模型的直径而定
headLength: radius / 3,
position: this.position
}
// 向上的向量
const vectorNormalUp = new Cesium.Cartesian3()
const vZ = new Cesium.Cartesian3(0, 0, 1)
Cesium.Cartesian3.normalize(this.position.clone(), vectorNormalUp)
// 向右的向量
const vectorNormalRight = new Cesium.Cartesian3()
// 由z轴向上 地表向上两个向量叉乘, 则可以得出, 向右的向量
Cesium.Cartesian3.cross(vZ, vectorNormalUp, vectorNormalRight)
// 向前的向量
const vectorNormalFront = new Cesium.Cartesian3()
Cesium.Cartesian3.cross(vectorNormalRight, vectorNormalUp, vectorNormalFront)
Cesium.Cartesian3.multiplyByScalar(vectorNormalFront, -1, vectorNormalFront)
this.axisX = new ArrowPolyline({
id: 'axisX',
color: Cesium.Color.GREEN,
direction: vectorNormalRight,
unit: Cesium.Cartesian3.UNIT_X,
...options
})
this.axisZ = new ArrowPolyline({
id: 'axisZ',
color: Cesium.Color.RED,
direction: vectorNormalUp,
unit: Cesium.Cartesian3.UNIT_Z,
...options
})
this.axisY = new ArrowPolyline({
id: 'axisY',
color: Cesium.Color.BLUE,
direction: vectorNormalFront,
unit: Cesium.Cartesian3.UNIT_Y,
...options
})
}
// 添加操作杆
_addRod () {
this.primitives.add(this.axisZ.primitive)
this.primitives.add(this.axisX.primitive)
this.primitives.add(this.axisY.primitive)
}
// 初始化操作杆
_rotationRod () {
const mx = Cesium.Matrix3.fromRotationY(Cesium.Math.toRadians(90))
const rotationX = Cesium.Matrix4.fromRotationTranslation(mx)
this.axisX.rotation(rotationX)
const my = Cesium.Matrix3.fromRotationX(Cesium.Math.toRadians(90))
const rotationY = Cesium.Matrix4.fromRotationTranslation(my)
this.axisY.rotation(rotationY)
}
// 点击监听
_clickListener = (e) => {
if (this.translationAxisIsSelected() || this.rotationAxisIsSelected()) {
this.viewer.baseViewer.scene.screenSpaceCameraController.enableRotate = false
this.pickPoint = this.viewer.baseViewer.scene.pickPosition(e.message.position)
}
}
/**
* 平移轴被选中
* @return {boolean}
*/
translationAxisIsSelected () {
return this.axisX.selected || this.axisY.selected || this.axisZ.selected
}
/**
* 旋转轴被选中
* @return {boolean}
*/
rotationAxisIsSelected () {
return this.axisSphereZ.selected || this.axisSphereX.selected || this.axisSphereY.selected
}
_clickUpListener = () => {
this.pickPoint = null
this.axis = null
this.viewer.baseViewer.scene.screenSpaceCameraController.enableRotate = true
this.auxiliaryBall.show = false
}
// 移动监听
_moveListener = (e) => {
const pick = this.viewer.baseViewer.scene.pick(e.message.endPosition)
if (!this.viewer.eventManager.press) {
this._resetMaterial()
} else if (this.axis && this.viewer.eventManager.press) {
this.translationAxisIsSelected() && this._precessTranslation(e, this.axis)
this.rotationAxisIsSelected() && this._precessRotation(e, this.axis)
return
}
if (pick && pick.id) {
this._resetMaterial()
let axis = null
if (this.axisX.is(pick.id)) {
axis = this.axisX
} else if (this.axisY.is(pick.id)) {
axis = this.axisY
} else if (this.axisZ.is(pick.id)) {
axis = this.axisZ
} else if (this.axisSphereX.is(pick.id)){
axis = this.axisSphereX
} else if (this.axisSphereY.is(pick.id)){
axis = this.axisSphereY
} else if(this.axisSphereZ.is(pick.id)) {
axis = this.axisSphereZ
}
if (axis) {
this.axis = axis
this.axis.select()
if(this.rotationAxisIsSelected()) {
this.auxiliaryBall.show = true
}
}
}
}
/**
* 处理平移
* @param e
* @param axis{AxisSphere}
* @private
*/
_precessRotation (e, axis) {
this.auxiliaryBall.show = true
if (!this.pickPoint) return
let cartesian3 = this.viewer.baseViewer.scene.pickPosition(e.message.startPosition)
Cesium.Cartesian3.subtract(cartesian3, this.position, cartesian3)
const vtStart = projectOnPlane(cartesian3, axis.direction)
cartesian3 = this.viewer.baseViewer.scene.pickPosition(e.message.endPosition)
Cesium.Cartesian3.subtract(cartesian3, this.position, cartesian3)
const vtEnd = projectOnPlane(cartesian3, axis.direction)
const cartesian = Cesium.Cartesian3.cross(vtStart, vtEnd, new Cesium.Cartesian3())
const angle = Cesium.Math.toDegrees(Cesium.Cartesian3.angleBetween(cartesian, axis.direction))
// 利用叉乘性质判断方向
let rotateAngleInRadians = Cesium.Cartesian3.angleBetween(vtEnd, vtStart)
if (angle > 1) {
rotateAngleInRadians = -rotateAngleInRadians
}
let mx = null
if (axis.id === 'axisSphereX') {
mx = Cesium.Matrix3.fromRotationX(rotateAngleInRadians)
} else if (axis.id === 'axisSphereY') {
mx = Cesium.Matrix3.fromRotationY(rotateAngleInRadians)
}else if (axis.id === 'axisSphereZ') {
mx = Cesium.Matrix3.fromRotationZ(rotateAngleInRadians)
}
const rotationX = Cesium.Matrix4.fromRotationTranslation(mx)
this.rotation(rotationX, axis, rotateAngleInRadians)
}
/**
*
* @param rotationX{Cesium.Matrix4} 旋轉角度
* @param axis{AxisSphere}
* @param rotateAngleInRadians
*/
rotation (rotationX, axis, rotateAngleInRadians) {
this.axisSphereX.rotationAxis(rotationX)
this.axisSphereY.rotationAxis(rotationX)
this.axisSphereZ.rotationAxis(rotationX)
this.axisX.rotationAxis(rotationX)
this.axisY.rotationAxis(rotationX)
this.axisZ.rotationAxis(rotationX)
this.rotateVectorByAxisForAngle(this.axisX.direction, axis.direction, rotateAngleInRadians)
this.rotateVectorByAxisForAngle(this.axisY.direction, axis.direction, rotateAngleInRadians)
this.rotateVectorByAxisForAngle(this.axisZ.direction, axis.direction, rotateAngleInRadians)
Cesium.Matrix4.multiply(
this.model.modelMatrix,
rotationX,
this.model.modelMatrix
)
const number = Cesium.Math.toDegrees(rotateAngleInRadians)
axis.updateAngle(number)
}
/**
* 处理选中
* @param e{{message: {startPosition: Cesium.Cartesian2, endPosition: Cesium.Cartesian2}}}
* @param axis{ArrowPolyline}
* @private
*/
_precessTranslation (e, axis) {
this.auxiliaryBall.show = false
if (!this.pickPoint) return
this.viewer.baseViewer.camera.getPickRay(e.message.startPosition, this.pickRay)
const startPosition = rayPlaneIntersection(this.pickRay, this.viewer.baseViewer.camera.direction, this.pickPoint)
this.viewer.baseViewer.camera.getPickRay(e.message.endPosition, this.pickRay)
const endPosition = rayPlaneIntersection(this.pickRay, this.viewer.baseViewer.camera.direction, this.pickPoint)
const moveVector = new Cesium.Cartesian3()
Cesium.Cartesian3.subtract(endPosition, startPosition, moveVector)
const moveLength = Cesium.Cartesian3.dot(axis.direction, moveVector)
this.translation(moveVector, axis.unit, moveLength)
}
/**
* 平移
* @param moveVector
* @param unit
* @param moveLength
*/
translation (moveVector, unit, moveLength) {
this.axisX.translation(moveVector, unit, moveLength)
this.axisY.translation(moveVector, unit, moveLength)
this.axisZ.translation(moveVector, unit, moveLength)
this.axisSphereX.translation(moveVector, unit, moveLength)
this.axisSphereY.translation(moveVector, unit, moveLength)
this.axisSphereZ.translation(moveVector, unit, moveLength)
const matrix4 = this.model.modelMatrix.clone(new Cesium.Matrix4())
Cesium.Matrix4.multiplyByTranslation(
this.model.modelMatrix,
Cesium.Cartesian3.multiplyByScalar(unit, moveLength, new Cesium.Cartesian3()),
this.model.modelMatrix
)
Cesium.Matrix4.getTranslation(this.model.modelMatrix, this.position)
Cesium.Matrix4.subtract(this.model.modelMatrix, matrix4, matrix4)
const cartesian3 = Cesium.Matrix4.getTranslation(matrix4, new Cesium.Cartesian3())
Cesium.Matrix4.multiplyByTranslation(
this.auxiliaryBall.modelMatrix,
cartesian3,
this.auxiliaryBall.modelMatrix
)
}
// 复位所有的材质
_resetMaterial () {
this.axisX.rest()
this.axisY.rest()
this.axisZ.rest()
this.axisSphereY.rest()
this.axisSphereZ.rest()
this.axisSphereX.rest()
this.auxiliaryBall.show = false
}
// 创建 旋转轴
_createSphereAxis () {
const radius = this.model.boundingSphere.radius * 2
this.axisSphereZ = new AxisSphere('axisSphereZ', radius, this.position, Cesium.Color.RED)
this.axisSphereX = new AxisSphere('axisSphereX', radius, this.position, Cesium.Color.GREEN)
this.axisSphereY = new AxisSphere('axisSphereY', radius, this.position, Cesium.Color.BLUE)
this.axisSphereZ.direction = this.axisZ.direction
this.axisSphereX.direction = this.axisX.direction
this.axisSphereY.direction = this.axisY.direction
}
// 旋转 旋转轴
_rotationSphereAxis () {
const mx = Cesium.Matrix3.fromRotationY(Cesium.Math.toRadians(90))
const rotationX = Cesium.Matrix4.fromRotationTranslation(mx)
this.axisSphereX.rotation(rotationX)
const my = Cesium.Matrix3.fromRotationX(Cesium.Math.toRadians(90))
const rotationY = Cesium.Matrix4.fromRotationTranslation(my)
this.axisSphereY.rotation(rotationY)
}
// 添加旋转轴
_addSphereAxis () {
this.primitives.add(this.axisSphereZ.primitive)
this.primitives.add(this.axisSphereY.primitive)
this.primitives.add(this.axisSphereX.primitive)
}
/**
* 添加辅助球, 用于辅助位置拾取
* @param {number} radius
* @param {Cesium.Color} color
*/
addAuxiliaryBall (radius, color){
const cartesian3 = CesiumUtils.extended(this.position, - radius)
const modelMatrix = Cesium.Matrix4.multiplyByTranslation(
Cesium.Transforms.eastNorthUpToFixedFrame(cartesian3),
new Cesium.Cartesian3(0.0, 0.0, radius),
new Cesium.Matrix4()
);
const sphereGeometry = new Cesium.SphereGeometry({
vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT,
radius: radius,
});
const sphereInstance = new Cesium.GeometryInstance({
id: 'auxiliaryBall',
geometry: sphereGeometry,
modelMatrix: modelMatrix,
attributes: {
color: Cesium.ColorGeometryInstanceAttribute.fromColor(
color
),
},
});
this.auxiliaryBall = this.primitives.add(
new Cesium.Primitive({
geometryInstances: sphereInstance,
appearance: new Cesium.PerInstanceColorAppearance({
translucent: true,
closed: true,
}),
})
)
this.auxiliaryBall.show = false
}
/**
* 通过轴旋转角度
* @param vector
* @param axis
* @param angle
*/
rotateVectorByAxisForAngle(vector, axis, angle){
const rotateQuaternion = normalizingQuaternion(Cesium.Quaternion.fromAxisAngle(axis, angle, new Cesium.Quaternion()))
const quaternion = cartesian3ToQuaternion(vector)
Cesium.Quaternion.multiply(
Cesium.Quaternion.multiply(
rotateQuaternion,
quaternion,
quaternion
),
Cesium.Quaternion.inverse(rotateQuaternion, new Cesium.Quaternion()),
quaternion
)
vector.x = quaternion.x
vector.y = quaternion.y
vector.z = quaternion.z
return quaternion
}
}
最后几个用到的数学函数
export const projectOnPlane = (vp, vn) => {
const vt = new Cesium.Cartesian3()
const multi = new Cesium.Cartesian3()
const divide = new Cesium.Cartesian3()
const cartesian3 = Cesium.Cartesian3.multiplyByScalar(vn, Cesium.Cartesian3.dot(vp, vn), multi);
Cesium.Cartesian3.divideByScalar(
cartesian3,
Cesium.Cartesian3.dot(vn, vn),
divide
)
Cesium.Cartesian3.subtract(vp, divide, vt)
return vt
}
export const rayPlaneIntersection = (ray, cameraDirection, pickPoint, result = new Cesium.Cartesian3()) => {
if (!pickPoint) {
throw new Error("cuowu")
return
}
const number = Cesium.Cartesian3.dot(cameraDirection, pickPoint);
const number1 = Cesium.Cartesian3.dot(cameraDirection, ray.origin);
const number2 = Cesium.Cartesian3.dot(cameraDirection, ray.direction);
const t = (number - number1) / number2
return Cesium.Cartesian3.add(ray.origin, Cesium.Cartesian3.multiplyByScalar(ray.direction, t, result), result)
}
export const cartesian3ToQuaternion = (cartesian3) => {
return new Cesium.Quaternion(
cartesian3.x,
cartesian3.y,
cartesian3.z,
0
)
}
export const normalizingQuaternion = (quaternion) => {
// Normalize( q ) = q/ |q| = q / (x*x + y*y + z*z + w*w)
return Cesium.Quaternion.divideByScalar(
quaternion,
moduloQuaternion(quaternion),
quaternion
)
}