How to get Viewport Position, Direction, UpVector? For Perspective and Ortho views.
Here is explanation Screenshot:
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1$\begingroup$ related: blender.stackexchange.com/questions/13738/… $\endgroup$– p2orJan 9, 2015 at 22:50
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$\begingroup$ I don't need camera. I need 3dView. Repspective/Ortho. But not camera object. $\endgroup$– mifthJan 10, 2015 at 20:30
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$\begingroup$ Can you define the view-position much more clearly, this is quite an important distinction. (The point in the center of the view you look at, the point you look from?) $\endgroup$– ideasman42Jan 11, 2015 at 13:21
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$\begingroup$ The point i look from. $\endgroup$– mifthJan 11, 2015 at 17:58
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2 Answers
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You can get information about the view from RegionView3D which can be accessed via space_data.region_3d.
There are utility functions available in the bpy_extras.view3d_utils module.
You may get the view direction like this
r3d.view_rotation * Vector((0.0, 0.0, -1.0))
the up direction should be
r3d.view_rotation * Vector((0.0, 1.0, 0.0))
and the view location:
r3d.view_matrix.inverted().translation
Or another way
region = context.region
rv3d = context.region_data
view3d_utils.region_2d_to_origin_3d(region, rv3d, (region.width/2.0, region.height/2.0))
Despite its name, RegionView3D.view_location specifies the view target.
answered Jan 11, 2015 at 10:31
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$\begingroup$ Thanks a lot! But Ortho view does not show position correctly. Here is my video test: youtu.be/Ia7wjCMafqA This line does not work in Ortho "r3d.view_matrix.inverted().translation". Do you know how to fix it? Thanks. $\endgroup$– mifthJan 11, 2015 at 12:17
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$\begingroup$ I reported the issue with OrthoView here developer.blender.org/T43206 $\endgroup$– mifthJan 11, 2015 at 12:59
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$\begingroup$ I added another approach according to the issue which was discussed. I hope you don't mind. $\endgroup$– mifthMar 4, 2015 at 14:19
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considering the answer given by pink vertex the first part is equivalent to:
r3d = bpy.context.area.spaces.active.region_3d
view_matrix = r3d.view_matrix
x,y,z = view_matrix.to_3x3()
with
view_dir = -z
up = y
