[osg-users] Different results from camera->getViewMatrix() in OSG 3.4.0 compared to OSG 3.2.1

[Ronny Hatteland]

robertosfield wrote:
> Hi Ronny,
> 
> 
> I don't recall any specific changes to view matrix management between OSG-3.2.1 and OSG-3.4.0.  I'm also not aware of any bugs being reported that look relevant to this what you are describing.
> 
> 
> Printing out two sets of view matrices for the two versions without the view's being identical isn't useful.  Try to create the exactly same input conditions - for instance by explictly setting the view matrix.  The mouse input are another variable you'd need to standardize.
> 
> 
> Also when describing the problem you'll need to do more than saying a "vertical offset", this has so many different possible interpretations that it's pointless even starting to guess what you mean.
> 
> 
> 
> Robert.
> 


Thank you for the quick reply! You are right. I fixed the input and now it is evident that the difference is in the windowMatrix:


Code:
WindowMatrix
3.4.0:
[0] {960.00000000000000, 0.00000000000000000, 0.00000000000000000, 0.00000000000000000}
[1] {0.00000000000000000, 443.00000000000000, 0.00000000000000000, 0.00000000000000000}
[2] {0.00000000000000000, 0.00000000000000000, 0.50000000000000000, 0.00000000000000000}
[3] {960.00000000000000, 581.00000000000000, 0.50000000000000000, 1.0000000000000000}
3.2.1
[0] {960.00000000000000, 0.00000000000000000, 0.00000000000000000, 0.00000000000000000}
[1] {0.00000000000000000, 443.00000000000000, 0.00000000000000000, 0.00000000000000000}
[2] {0.00000000000000000, 0.00000000000000000, 0.50000000000000000, 0.00000000000000000}
[3] {960.00000000000000, 443.00000000000000, 0.50000000000000000, 1.0000000000000000}



Is seems like the difference in value [3][1] is what gives the vertical offset on the screen of 138 pixels (between the cursor and the object I normally display on the cursor position).

Do you have any suggestion of how I could solve this?

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http://forum.openscenegraph.org/viewtopic.php?p=66811#66811