ol5 ReplayGroup

Is your feature request related to a problem? Please describe. in openlayers 4.6 i use

var _replayGroup = new ol.render.canvas.ReplayGroup(0, extent, 8,true,100);

but the ReplayGroup disapear in ol5 ? is there other method instead of ReplayGroup ?

thanks?

[ParnDeedlit]

thanks for all of you, english is not my home language, my english description will easy.

Result

• BuilderGroup to create the instructions;
• ExecutorGroup to run them.

acroding your help i finish my base work. thank you,

Where I use it?

Intent Cesium VectorTile

Due to Cesium don not support mapbox vectortile , i deside to work it out.

Inspiration

First i use the leaflet.vectorgrid & ol.vectortile. when i compare the two method of vectortile. I think both of two are very hard to transfrom to cesium.

Until i find this ol-mapbox-style && ol-cesium

The ol-mapbox-style is so cool, I think it the best unfical (mapbox) way to draw vectortile. Perfect display effect & smooth load process

When i see these code, I find i can use the ol-mapbox-style as vt-parse to draw canvas. And I use the code to draw vt in canvas tile.

var replayGroup = new ReplayGroup(0, extent, buffer, true, 100);

for(...){
    // loop vector tile styles to every feature to draw 
    renderFeature(_replayGroup, feature, styles[j], 16);
}

replayGroup.finish();
replayGroup.replay(canvas, transform, ratote, hash,replays); 

when draw over the tile, then take this to cesium tile ImageProvider, then finish the all method.

this is my first test to conbine openlayers & cesium & vectortile, i see the source code stylefunction is perfect to render vectortile in canvas. other code to translate mvt-style is simple to convert font/width/color, but this code conside very deep to detail sush as filter & source-layer & font & sprite (especially sprite, these show the high level code)

Bug & Disavantage

I use Cesium-ImageProvider & ol-mapbox-style/stylefunction to render vectortile, It indeed to draw the vectortile in cesium. but when some tile is on loading , some tile is over load, the mouse slide process is hard or delay.

i find ol-mapbox-style show me a new method to translate mapbox vectortile style to ol-vectortile-style, and this code avoid slide process block.

I will try to use the idea to deal with the block, thank you again。 you help me a lot, this code ol-mapbox-style/stylefunction is so cool.

[ParnDeedlit]

Hi @ParnDeedlit, the replay group mechanism was split:

• BuilderGroup to create the instructions;
• ExecutorGroup to run them.

Thank you , it works