How can I solve this problem, and can I set multiple collision shapes? Because my map is very large.thanks
You need to use multiple game objects with each of them having a collision component with a convex hull shape.
got it，thaks 
I just learned about Box2d only supports convex shape.
Is it possible to decompose concave polygon into convex polygon and add it to collision component through convex hull shape file?
If possible then what’s the convex hull shape file structure for holding points data for multiple convex shapes.
I’m looking into improving Defold polygon editor for my project if it’s possible.
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