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>swf_lookat</H1
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><P
> (PHP 4 )</P
>swf_lookat -- Define a viewing transformation</DIV
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><H2
>Description</H2
>void <B
CLASS="methodname"
>swf_lookat</B
> ( double view_x, double view_y, double view_z, double reference_x, double reference_y, double reference_z, double twist)<BR
></BR
><P
> The <B
CLASS="function"
>swf_lookat()</B
> function defines a viewing
transformation by giving the viewing position (the parameters
<TT
CLASS="parameter"
><I
>view_x</I
></TT
>, <TT
CLASS="parameter"
><I
>view_y</I
></TT
>, and
<TT
CLASS="parameter"
><I
>view_z</I
></TT
>) and the coordinates of a reference
point in the scene, the reference point is defined by the
<TT
CLASS="parameter"
><I
>reference_x</I
></TT
>, <TT
CLASS="parameter"
><I
>reference_y
</I
></TT
>, and <TT
CLASS="parameter"
><I
>reference_z</I
></TT
> parameters.
The <TT
CLASS="parameter"
><I
>twist </I
></TT
> controls the rotation along
with viewer's z axis.
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