Convert double array to jdoubleArray

[Tobias]

Hello,
I have an array like this one in my C code:

double gl_para[16];

I also have a matrix like this one in my C code:

double patt_trans[3][4];

I need to convert this gl_para to a jdoubleArray and I also need to
somehow convert the matrix as well to something that java understands,
how do I do this?

Best regards,
Tobias Lindberg

[Simeon Lee]

Hello Tobias

I think the following code might help you.

jbyteArray byteArray;
char msg[50];
int l;

sprintf(msg, "May the force be with you.");
l = strlen(msg);

byteArray = (*env)->NewByteArray(env, l);
(*env)->SetByteArrayRegion( env, byteArray, 0, l, (const jbyte*)msg );



Sorry for it's not exact what you want, but probably there is similar
function for 'double'.
The 'env' variable in above is JNIEnv type, which is cached where I
get it through the native function's parameter.
You can cache the JNIEnv object at JNI_OnLoad or any native functions
you made.

Sincerely,
Simeon Lee

[Tobias Lindberg]

Hello, thank you very much, your solution helped me, this is how I solved it other people are searching for the same answer:

   double gl_para[16];

    jdoubleArray doubleArray = (*env)->NewDoubleArray(env, 16);
    (*env)->SetDoubleArrayRegion( env, doubleArray, 0, 16, (const jdouble*) gl_para );

    return doubleArray;

2009/11/27 Simeon Lee <db.la...@gmail.com>

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