Panning a 3d viewport in 2d direction with rotated camera

Posted by Noob Game Developer on Game Development See other posts from Game Development or by Noob Game Developer
Published on 2012-10-19T12:25:06Z Indexed on 2012/10/19 17:20 UTC
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Filed under:

3d

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actionscript-3

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camera

I am using below code to pan the viewport (action script 3 code using flare3d framework)

_mainCamera.x-= Input3D.mouseXSpeed;
_mainCamera.z+= Input3D.mouseYSpeed;

Where as Input3D.mouse[X|Y]Speed gives the displacement of the mouse on the X/Y axis starting from the position of the last frame.

This works perfect if my camera is not rotated. However, if I rotate the camera (x by 30, y by 60) and pan the camera then it goes wrong. Which is actually correctly panning according to the code. But this is not desired and I know I need to do some math to get the correct x/y which I am not aware of it.

Can some one help me achieving it?

Update:

I am getting an Idea but I am not sure how to do it :(

Get the mouseX/Y deltas (xd,yd)
Get the current camera coords (pos3d)
Convert to screen coords (pos2d)
Add deltas to screen coords (pos2d+ (xd,yd))
Convert above coords to 3d coords

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