Hit detection when overlays and feature positions overlap.

[lawyer888]

Hit detection when overlays and feature positions overlap.

[ahocevar]

Before digging into details: is there any reason why you're using Overlays for your icons? These could just as well be point features in a vector layer.

[lawyer888]

Before digging into details: is there any reason why you're using Overlays for your icons? These could just as well be point features in a vector layer.

In my project, there are many features, and there are complex filtering and judging requirements for the interaction of many states and data. There will be thousands of features, especially many line segments, each with different properties and statuss，and there will be requests and communication involved as well. If I put the icons into the feature system, Every time I write logic, I have to consider excluding these icons, making it difficult to avoid the integration of icon logic with features as a whole，On the other hand, the separate overlay system only has a few of nodes, Static information does not involve communication, so I can manage these overlays separately, which is relatively easy. Even if there are changes, I don't need to adjust them in the logic of the feature system.

[lawyer888]

Before digging into details: is there any reason why you're using Overlays for your icons? These could just as well be point features in a vector layer.

this is my personal opinion, but indeed using features can facilitate interaction. I just didn't consider that in cases with very limited interaction, such issues may arise. It can be considered a minor issue. For example, an icon only has one interaction, which is to click and display static information, so I didn't think much and just used it.
Besides ,I agree with what you said.

[ahocevar]

If I put the icons into the feature system, Every time I write logic, I have to consider excluding these icons

Not if you put your icons on a separate layer and use Layer.getFeatures(pixel) or Map.getFeaturesAtPixel() with a layer filter. Then you have a clear separation. Also, there is https://www.npmjs.com/package/ol-marker-feature, if you want to combine the convenience of an Overlay with the convenience of a Feature.

[lawyer888]

If I put the icons into the feature system, Every time I write logic, I have to consider excluding these icons

Not if you put your icons on a separate layer and use Layer.getFeatures(pixel) or Map.getFeaturesAtPixel() with a layer filter. Then you have a clear separation. Also, there is https://www.npmjs.com/package/ol-marker-feature, if you want to combine the convenience of an Overlay with the convenience of a Feature.

OK, I understand. Actually, I had considered placing them on different layers before, but at the beginning of the project, I didn't think that a few icons would have a significant impact, so I didn't do that, and I didn't consider the limitations of overlays. Thank you for your response.