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# hlsl normalize a float9 ?

## 4 posts in this topic

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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Ehm, language?

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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[i], 2);

z = sqrt(z);

for(int i = 0; i < 9; i++)
data[i] /= 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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It depends on how you define 'normalize'. With regards to length, like Tiago posted, so their Pythagorean length is 1? With regards to weighting so they sum to 1?

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