Incompatible updates

In the next version , That is to say Cesium 1.92, Third party Library when.js Will be native Promise API Instead of .Cesium.when Will be abandoned , And will be removed in the next version . About how to upgrade , Please refer to the personal comments below , I reprinted the official guidance document .
Fixed when Scene When there is no rendering （ for example css Set style to none） Method for obtaining ray of camera object （camera.getPickRay()） Thrown exception , This function will return undefined 了 .

newly added

by WebGL 2.0 add to MSAA（ Multisampling anti aliasing ） Support . You can create Viewer Time transfer msaaSamples Options , It can also be used. Scene.msaaSamples Attribute control .
Now? ,glTF By default, the model uses ModelExperimental Architecture processing .
stay ModelExpertimental Switching back clipping is supported in the architecture .
towards Viewer and Scene Class depthPlaneEllipsoidOffset, To solve the strange rendering problem under the ellipsoid plane
stay ModelExperimental The architecture supports debugColorTiles
stay ModelExperimental Shadow is supported in the architecture
Added... To all matrix classes packArray and unpackArray Method
Add some affine transformation help functions to the matrix class
- Matrix2：setScale、setUniformScale、setRotation、getRotation、multiplyByUniformScale
- Matrix3：setScale、setUniformScale、setRotation、multiplyByUniformScale
- Matrix4：setUniformScale、setRotation、getRotation、fromRotation
by AxisAlignedBoundBox Class add fromCorners Method
by BoundingSphere Class add fromTransformation Method
by OrientedBoundingBox Class add fromTransformation、computeCOrners、computeTransformation Method
by Rectangle Class add subsection Method
glTF The copyright information will be marked in the copyright area
by 3D Tiles Add an option , It can determine whether the copyright information of the data set is displayed on the screen
Changed the copyright collation to the frequency of occurrence

Problem fix

Fixed the use of ModelExperimental The model of the architecture will not update the scope ball when updating its model matrix
Fixed in Safari Browser FeatureID Artifact of texture
Fixed the use of ModelExpertimental The opaque model of the architecture uses a translucent shader , But the error of not rendering correctly

Personal comments

① MSAA

MSAA Not to mention , It is recommended that all machines with good conditions be operated , coordination FXAA Improve the display effect .

const viewer = new Viewer('cesiumContainer', {
  msaaSamples: 4 // 1, 2, 4, 8,  Default  1,  The higher the effect, the better ,  The more you eat 
})
viewer.postProcessStages.fxaa.enabled = true

What's the difference between them ？

msaa Occurs before the end of the pipeline , To be exact, it is the multi sampling of the elements in the rasterization stage , Output to render buffer , Then draw it on the screen
fxaa Occurs in the post-treatment stage after the end of the pipeline , The rendered results are processed by image algorithm

MSAA stay WebGL 2.0 Only then ,WebGPU Native supports . at present WebGPU Not yet mature ,WebGL 2.0 A while ago, it has just fully adapted to all mainstream browsers , therefore Cesium Anti aliasing effect MSAA Function support is relatively slow .

② The camera takes rays

The return value type of the function that gets the ray has now changed

const ray = viewer.camera.getPickRay() // Ray  or  undefined

③ ModelExperimental

In the experiment Model, It's about the original Model Class schema upgrade , This is to adapt to a more powerful glTF, And for the next generation 3D Tiles To prepare the .

expect 2022 This new structure will be regularized in .

④ gradually ES6

Careful friends may have observed , The source code has put var Switch to let/const Declare variables . In the next version （1.92）,CesiumJS Plan to integrate third-party asynchronous libraries when.js Replace with ES6 Native Promise Realization . however , Distance source code is completely used async/await It is estimated that there is still a way to go .

About migration Cesium.when, That's what officials say ：

Remove all used Cesium.when Code for
Cesium.defer Instead of when.defer
Promise.all Instead of when.join
stay Promise Chain call ,catch Instead of otherwise,finally Instead of always; If you use async/await instead of Promise chain , Then there's no need to change

besides , We also hope that the official team will complete ES6 Of class、 Conversion of template string .