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hlsl normalize a float9 ?

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i have a  float  data[9];

 

i need to normalize this 

but i tryed to do  

 

data = normalize(data)

 

which it did not like  , because its an array , 

 

how would i  code this please 

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What sort of data does the float[9] represent? Is it a 3x3 matrix? or perhaps 3 Vector3's?

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If data[9] is simply a 9 dimensional vector you can do it manually:

 

float z = 0;

for(int i = 0; i < 9; i++)
    z += pow(data, 2);

z = sqrt(z);

for(int i = 0; i < 9; i++)
    data /= z; //Or use a temporary vector if "data" is in a constant buffer

 

 

If data[9] is a 3x3 matrix divide each value by the determinant.

 

Do you have to normalize it in the shaders? It would be faster do normalize it in the CPU and send to the shaders.

Edited by TiagoCosta

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