Compound Collision with dynamic array [solved]

[Auradrummer]

Hello guys,

I have a project, where I need to create a compound collision with various objects parts. But, I'm using the same classes for different objects, so I need to pass a dynamic array of collisions to CreateCompoundCollision, instead of a static array.

But, when I do this (I'm using the 'array' class of Irrlicht) I receive a following compiler error message:
cannot convert `irr::core::array<NewtonCollision*, irr::core::irrAllocator<NewtonCollision*> >' to `NewtonCollision* const*' for argument `3' to `NewtonCollision* NewtonCreateCompoundCollision(const NewtonWorld*, int, NewtonCollision* const*, int)'

There is another way, or another class, to make this?

Thanks

Ney

[Julio Jerez]

why don't yo just make an array of pointers on the stack and copy the shapes?


if teh array is flat in memory, you could also take the adress of the first elemet of you dynamics array,
& irr::core::irrAllocator<NewtonCollision*>>[0]

[Auradrummer]

Hello Master,

I tried this before, I made the following line:

Code: Select all

NewtonCollision * airplane = NewtonCreateCompoundCollision(nWorld, pieces.size(), pieces[0], 30);

where

Code: Select all

array <NewtonCollision *> pieces;


I'm still getting the compiler error:
'cannot convert `NewtonCollision*' to `NewtonCollision* const*' for argument `3' to `NewtonCollision* NewtonCreateCompoundCollision(const NewtonWorld*, int, NewtonCollision* const*, int)'

Type casting doesn't worked too... I'll keep trying.

Thanks

[Auradrummer]

Solved Master,

I made an conceptual programming error.

I need to pass the address of the first pointer, as you said, and not the address of first collision. So, I have to pass a pointer to pointer.

This way, I have to:

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array <NewtonCollision *> pieces;
NewtonCollision * mesh = NewtonCreateCompoundCollision(nWorld, pieces.size(),&pieces[0], 30);


and not (without the reference pointer)

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NewtonCollision * mesh = NewtonCreateCompoundCollision(nWorld, pieces.size(),pieces[0], 30);


Worked well.