The PLplot Plotting Library: Programmer's Reference Manual
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pllightsource: Sets the 3D position of the light source

pllightsource (x, y, z);

Sets the 3D position of the light source for use with plotsh3d.

x (PLFLT, input)

X-coordinate of the light source.

y (PLFLT, input)

Y-coordinate of the light source.

z (PLFLT, input)

Z-coordinate of the light source.

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