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Questions - entity-component-system

Multiple mutable queries with Legion ECS

I am using the Legion ECS and trying to use multiple mutable queries and running into some borrow checker constraints. I basically want to update the state of components by comparing with all of the o...
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Toby Hede

rust

borrow-checker

entity-component-system

Votes: 0

Answers: 1

Latest Answer

The issue is that your components vector is a vector containing references to Component, which borrows from world and means you can't mutably borrow it later when you go to edit the component. You can...
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Colonel Thirty Two

How to get all derived classes from a base class in C++?

I'm implementing a game engine in C++ which uses an ECS (Entity-Component-System). Each GameObject can have multiple Components (stored in GameObject's std::vector<Component*> _components). I ha...
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FeuFeve

c++

class

templates

types

entity-component-system

Votes: 0

Answers: 1

Latest Answer

Assuming these classes are all polymorphic/dynamic (which they need to be to use typeid like this), you can just use dynamic_cast instead: template <typename T> T* GetComponent() { for (Comp...
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Chris Dodd

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