How to stop Manipulate changing view point

When using the following manipulate I can rotate the plot and manipulate the value without my view point changing;

Manipulate[Plot3D[Sin[a*x + y^2], {x, -3, 3}, {y, -2, 2}], {a, 1, 5}]

If I rotate one of these plot in the following manipulate the value the view point changes back to the default.

Manipulate[GraphicsRow
[{Plot3D[Sin[a*x + y^2], {x, -3, 3}, {y, -2, 2}],
Plot3D[Sin[a*x + y^2], {x, -3, 3}, {y, -2, 2}]}],
{a, 1, 5}]

I have a much more complex plot that contains a GraphgicsRow and a Column and I want it to keep the view point of the plot while I manipulate it. Is there a simple way to do this? Is the problem the GraphicsRow or is that just a coincidence?

Thanks.

GraphicsRow is convenient to use, for example, when you would like to control the total width of many graphics or image objects with a single setting - because GraphicsRow takes ImageSize option. But there is no real reason to use it. Use Row instead and control size of graphics individually for each plot:

Manipulate[Row[{
Plot3D[Sin[a*x + y^2], {x, -3, 3}, {y, -2, 2}, ImageSize -> 300],
Plot3D[Sin[a*x + y^2], {x, -3, 3}, {y, -2, 2}, ImageSize -> 300]}], {a, 1, 5}]

If you must use GraphicsRow or just curious how to make it work, here is a way - separate with Dynamicthe options of internal Plot3Ds so they do not reset each other. This maybe way to complicated and an overkill - but at least it is interesting:

Manipulate[GraphicsRow[{
Graphics3D[Dynamic@Plot3D[Sin[a x + y^2], {x, -3, 3}, {y, -2, 2},
Boxed -> False, Axes -> False][]],
Graphics3D[Dynamic@Plot3D[Sin[a x + y^2], {x, -3, 3}, {y, -2, 2},
Boxed -> False, Axes -> False][]]}], {a, 1, 5}]

You need Graphics3D because it can take Dynamic inside, but Plot3D cannot.

• Thanks Vitaliy. It works when I replace the GraphicsRow with a Row. – Cam Feb 22 '13 at 2:01