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thedodgeruk

initilise a D3DXVECTOR

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.h file
D3DXVECTOR3 rotWorld;


.cpp file
rotWorld.x = 0;
rotWorld.y = 0;
rotWorld.z = 0;




is there a simple way to set all componants of D3DXVECTOR to zero

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My vector class' contain static member variables called 'Zero' so I can copy construct/assign 0 to all components of the vector (without having to create a temporary). Could also pass it to a function if you really wanted, meh.

You can define a constant such as the following:
const D3DXVECTOR3 D3DXZeroVec3(0, 0, 0);

// ... and then maybe ...

D3DXVECTOR3 rotWorld = D3DXZeroVec3;

// .. but whats wrong with just ...

D3DXVECTOR3 rotWorld(0.0f, 0.0f, 0.0f); // constructor ?







maybe that would help, I donno..

PS: This method comes in particularly handy for matrices IMO, in this way you can define the special 'Identity' and 'Zero' matrices and. Looks nicer than a function call, virtually the only difference.

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when initilizing variables inside of a class you should use an initilizer list attached to the constructer


MyClass::MyClass() : randomD3DVec(0.0f,0.0f,0.0f), randomInt(0), randomFloat(0.0f)
{

}



This is the appropriate way to do it. It has to do with variables in a class being created earlier than some other class construction, so its better to specify them to be initilized on their creation rather than creating them then assigning values to them.

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