Dear friends:
in openGL programming . there is a method to pick the object from the
scene. rendering the scene in the back buffer, every object with an unique
color .
than , rendering second time in a normal way. when the user move mouse in the
screen . read the pixel value under the mouse point . then find the color in
an prepared hashmap. comparing the color , we can known which object is
selected.
i am wondering whether the osg can archieve the same goal ? because
i want to implement an edit function with osg . i have a mountain model
composite of hundreds of
thousands of triangles . and my goal is putting high resolution digital image
on the model, and fusion the image and model into a model with texture . now ,
the problem i face is
that using the mouse to find the same points in the model and in the digital
image.
can some one give me an advice.
Shawl
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