Does anyone know how to find what is the 3d view ‘pseudo camera’ origin
I need to find the origin point af the 3d view (its frustum) but without using a camera object
I try to use these from the Blender.Window module:
GetViewMatrix()
GetViewOffset(ofs)
GetViewQuat()
GetViewVector()
But I am not sure about how to do this
Can someone clarify this to me because I am getting confuse ?
bonne annee
joyeux noel 
I’d love to know the answer to this question as well.
In orthographic view (and in C), the view location is
G.vd->viewinv[2] (the 3rd row of the inverse of the view matrix, where viewinv is declared as: float viewinv[4][4]; )
I believe that the view location in perspective mode is:
(intrr told me this, and I have not yet been able to verify it due to bugs in code that I am writing)
/* C code for the view location */
loc[0]= G.vd->dist*G.vd->viewinv[2][0];
loc[1]= G.vd->dist*G.vd->viewinv[2][1];
loc[2]= G.vd->dist*G.vd->viewinv[2][2];
VecSubf(loc, loc, G.vd->ofs);
I don’t know if G.vd->dist is available in Python, though.
I hope that helps!
Matt
I’ve doen some test and found that GetView Offset doesn’t work so use Get view matrix and matrix calculations.
pritning the straight window comes out as
[1.0000, 0.0000, 0.0000, 0.0000]
[0.0000, 1.0000, 0.0000, 0.0000]
[0.0000, 0.0000, 1.0000, 0.0000]
[0.0000, 0.0000, 0.0000, 1.0000]
the basics of the matrix works liek this
[rot, rot, rot, w]
[rot, rot, rot, w]
[rot, rot, rot, w]
[locx, locy, locz, n]
unfortuneatly thsi doesn’t accoutn to zooming in so yeah but if we shift+click move the world to the right we get this
[1.0000, 0.0000, 0.0000, 0.0000]
[0.0000, 1.0000, 0.0000, 0.0000]
[0.0000, 0.0000, 1.0000, 0.0000]
[-7.4435, 0.0677, 0.0000, 1.0000]
when you rotate the view a bit from a centered top view you get
[0.3455, 0.0040, 0.9384, 0.0000]
[0.1854, 0.9800, -0.0725, 0.0000]
[-0.9199, 0.1990, 0.3378, 0.0000]
[0.0000, 0.0000, 0.0000, 1.0000]
and finally from front and sie view
front:
[1.0000, 0.0000, 0.0000, 0.0000]
[0.0000, 0.0000, -1.0000, 0.0000]
[0.0000, 1.0000, 0.0000, 0.0000]
[0.0000, 0.0000, 0.0000, 1.0000]
side
[-0.0000, 0.0000, 1.0000, 0.0000]
[1.0000, -0.0000, 0.0000, 0.0000]
[0.0000, 1.0000, -0.0000, 0.0000]
[0.0000, 0.0000, 0.0000, 1.0000]
hope this helps a bit
MacBlender
Matrix math ain’t my strong suit, %| so … “use the source, Luke!”