Function return types in Matlab Coder

Hello, I am investigating the Matlab Coder functionality. I have 2 quick questions let's say I have the following function in Matlab:

function int_point = my_cross(line1,line2)

int_point = cross(line1,line2);

end

The corresponding C++ function generated by the coder is the following:

void my_cross(const double line1[3], const double line2[3], double int_point[3])

{

int_point[0] = line1[1] * line2[2] - line2[1] * line1[2];

int_point[1] = line2[0] * line1[2] - line1[0] * line2[2];

int_point[2] = line1[0] * line2[1] - line2[0] * line1[1];

}

Question 1) Is there a way to have the c++ function having return type double instead of returning as parameter?

Question 2) In the generated c++ function where my_cross is called the parameters are passed by pointer but I want to pass by value. Can I change this behaviour?

Thanks.

Answer 1

[Mukund Sankaran]

Hello,

This doc page provides some insight into what you are observing: https://www.mathworks.com/help/coder/gs/differences-in-the-appearance-of-generated-code-and-matlab-code.html

Another similar question was posed a while ago, and the answer there contains some more specifics as well: https://www.mathworks.com/matlabcentral/answers/781348-matlab-coder-generated-a-c-function-which-has-void-output-even-though-the-matlab-function-has-doubl

Hope this helps!

[Kara657]

Thanks.