How to read matrix values?

[konstantin magnus]

4@m = ch4('transform');
@test = @m[2][3];

The first line assigns a 4x4 matrix channel to 4@m. I tried different things, but unfortunately the second line does not read the corresponding value from the matrix. How would I do that?

[f1480187]

Strange.
I have a feeling that it should work. Other methods still available: 4@m.zw and getcomp(4@m, 2, 3).

 

The "[2][3]" syntax is documented in the array section. Probably just a bug with the parser.

Edited July 29, 2017 by f1480187

[konstantin magnus]

Thank you. Your methods work!

Just for the record: @test = @m[2][3]; throws:

/obj/geo1/attribwrangle1/attribvop1/snippet1: Call to undefined array index operator 'matrix[int]', returning one of vector4, vector2, vector, float[], int[], vector4[] or vector[]. (2,25)
/obj/geo1/attribwrangle1/attribvop1/snippet1: Ambiguous call to array index operator ''. Candidates are: 'float vector4[int]', 'float vector2[int]', 'float vector[int]', 'float float[][int]' (2,28).
Error: Error in VOP 'snippet1'.

 

[ikoon]

Even for arrays, I cannot read the value directly from @. So I define temporary "non" @ variable like this:

vector array[] = v[]@atrail;
vector position = array[i];

Even in the documentation, they don't acces directly the @ attribute. They say float a = m3[0][1]; // not @m3[0][1]

EDIT: Now I have tried to read directly the v[]@atrail and my "workaround" is not needed. I think it was needed. Sorry for the confusion.

Edited July 31, 2017 by ikoon