simpleCar | A simple racing game using threejs | Game Engine library
kandi X-RAY | simpleCar Summary
kandi X-RAY | simpleCar Summary
A simple racing game using threejs.
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QUESTION
I'm trying to build the following type structure for a library I'm writing, and I'm having trouble with the type system.
CarLike
...ANSWER
Answered 2019-Mar-02 at 22:32A SportsCar is not a CarLike[String, SportsCar]
, it is a CarLike[String, SimpleCar[String]]
. Note that SportsCar extends SimpleCar[String]
, but that doesn't help, as CarLike
is not covariant in C
.
You can't really make CarLike
covariant in C
, as its crash
method accepts a C
. Instead, you can pass SimpleCar[String]
to Crasher
(after all, sports cars can crash with other cars, right?):
QUESTION
I need to create a LeafSystem
which itself contains another sub-LeafSystem
(a SimpleCar
in my case) such that some inputs is passed to SimpleCar and the outputs of SimpleCar
is combined with some other processing to produce the final output of my LeafSystem
.
I'm guessing I need to create a Diagram
within my LeafSystem
and create something like a "bypass" port that pipes inputs to outputs so I can use Connect
to wire them up. Is this the right approach?
ANSWER
Answered 2018-May-06 at 17:38A "System that contains another System" is exactly the definition of a Diagram in Drake. Consider making the top level a Diagram rather than a LeafSystem. Then you can use Connect
to feed a Diagram's input port to an internal LeafSystem, and to forward an internal output port to a Diagram output port.
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