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Old   August 13, 2012, 09:28
Default Problem ND_SET
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Fer Villa
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Hi

I need help!!!

I need create a vector in 2D from to the cordenates x and y. I have the x component, tx_l, and the y component, ty_l. I tried with the follow UDF:

real tx_l, ty_l;
real t_l [ND_ND]

tx_l = mu_l*C_DUDX(cell,thread_l)*C_UDSI_G(cell,thread_l, 0)[0] + 0.5*mu_l*C_UDSI_G(cell,thread_l,0)[1]*(C_DUDY(cell,thread_l) + C_DVDX(cell,thread_l));

ty_l = mu_l*C_DVDY(cell,thread_l)*C_UDSI_G(cell,thread_l, 0)[1] + 0.5*mu_l*C_UDSI_G(cell,thread_l,0)[0]*(C_DUDY(cell,thread_l) + C_DVDX(cell,thread_l));

ND_SET(t_l[0], t_l[1], tx_l, ty_l)

But this not works. The error is:

error: macro "ND_SET" requires 6 arguments, but only 4 given

Also I tried with:

t_l[0] = tx_l;
t_l[1] = ty_l;

In this case gave no error, but I'm not sure if well.

Anyone knows, how create a vector using the ND_SET macro in this case, which I have the components?

Thanks!!!
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Old   August 15, 2012, 23:03
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ND_SET requires 6 arguments no matter what the value of ND_ND is. you have to write something like
ND_SET(t_l[0], t_l[1], NULL, tx_l, ty_l, NULL)
because the 3rd and 6th arguments must appear but are not used if ND_ND is 2.
It is ok you assign the value for t_I array directly, which is almost the same as what the macro ND_SET does.
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Old   August 16, 2012, 17:44
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Fer Villa
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Thank you very much for your reply.

Quote:
Originally Posted by blackmask View Post
ND_SET requires 6 arguments no matter what the value of ND_ND is. you have to write something like
ND_SET(t_l[0], t_l[1], NULL, tx_l, ty_l, NULL)
because the 3rd and 6th arguments must appear but are not used if ND_ND is 2.
It is ok you assign the value for t_I array directly, which is almost the same as what the macro ND_SET does.
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Old   May 16, 2014, 18:45
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Chuang Wei
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Quote:
Originally Posted by blackmask View Post
ND_SET requires 6 arguments no matter what the value of ND_ND is. you have to write something like
ND_SET(t_l[0], t_l[1], NULL, tx_l, ty_l, NULL)
because the 3rd and 6th arguments must appear but are not used if ND_ND is 2.
It is ok you assign the value for t_I array directly, which is almost the same as what the macro ND_SET does.
Thank you so much for help! It works like a charm!
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