[SOLVED] can someone give a more detailed discription about the player setUp and setViewDirection?

[chao.zhang]

hello, everyone.

 

 

What exactly does the setUp of player means, we want to set the camera rotate around the earth equator。

but the result is not what we desire.

 

Thanks in advance.

[chao.zhang]

 

Let me make it more clear.

 

I have a earth Sphere with the center at position (0, 0, 0), I need to move the camera around the earth equator

and make sure the viewport center is always the sphere center.

 

so the position P of camera path (the red circle) can be computed as P(RcosΘ, RsinΘ, 0).

 

then the camera view direction at position P is V(-RcosΘ, -RsinΘ, 0) ?

 

and should I set the up vector of the player?

 

anyone knows please help, thanks.

[ulf.schroeter]

The up-vector defines the roll degree-of-freedom of the camera. In your case up should be vec3(0,0,1).

[chao.zhang]

many thanks.