Forgot to mention examples to look at:
osgprerender for RTT cameras,
osgreflect for stencil buffer
osgpick for tracking mouse movements.
On 6/26/07, Robert Osfield <[EMAIL PROTECTED]> wrote:
On 6/26/07, 石头 <[EMAIL PROTECTED]> wrote:
> I am sorry I did't explained clearly which type of the magnifying glass
> I need to realize.
>
> Like a telescope, and the circle area(the cursor is the center) of the
> scene is magnifying when My mouse move on the screen.
OK, that's a bit clearer.
There are two basic approach you can take:
1) Create a Render to Texture (RTT) Camera to capture the zoomed in view
and than a textured polygon to render this over the main view.
2) Use a second Camera for the zoom in view, but use a stencil
buffer to create
the circular region so that the zoomed in view doesn't
obliterate the background
view.
Robert.
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