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fix for python module region_2d_to_vector_3d and region_2d_to_location_3d functions in ortho mode.

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Campbell Barton 2011-05-18 15:57:20 +00:00
parent 6266e62170
commit 0c41635f85
1 changed files with 34 additions and 6 deletions
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40
release/scripts/modules/bpy_extras/view3d_utils.py
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@ -19,6 +19,17 @@
# <pep8 compliant>
def _is_persp_matrix(persmat, eps=0.00001):
"""
crummy way to check if its a perspective matrix
"""
return not (
abs(persmat[0][3]) < eps and \
abs(persmat[1][3]) < eps and \
abs(persmat[2][3]) < eps and \
abs(persmat[3][3] - 1.0) < eps)
def region_2d_to_vector_3d(region, rv3d, coord):
"""
Return a direction vector from the viewport at the spesific 2d region
@ -36,12 +47,17 @@ def region_2d_to_vector_3d(region, rv3d, coord):
"""
from mathutils import Vector
dx = (2.0 * coord[0] / region.width) - 1.0
dy = (2.0 * coord[1] / region.height) - 1.0
persmat = rv3d.perspective_matrix.copy()
viewvec = rv3d.view_matrix.inverted()[2].xyz.normalized()
viewvec = rv3d.view_matrix.inverted()[2].to_3d().normalized()
perspinv_x, perspinv_y = rv3d.perspective_matrix.inverted().to_3x3()[0:2]
return ((perspinv_x * dx + perspinv_y * dy) - viewvec).normalized()
if _is_persp_matrix(persmat):
dx = (2.0 * coord[0] / region.width) - 1.0
dy = (2.0 * coord[1] / region.height) - 1.0
perspinv_x, perspinv_y = persmat.inverted().to_3x3()[0:2]
return ((perspinv_x * dx + perspinv_y * dy) - viewvec).normalized()
else:
return viewvec
def region_2d_to_location_3d(region, rv3d, coord, depth_location):
@ -63,8 +79,20 @@ def region_2d_to_location_3d(region, rv3d, coord, depth_location):
:rtype: :class:`Vector`
"""
from mathutils.geometry import intersect_point_line
origin_start = rv3d.view_matrix.inverted()[3].to_3d()
persmat = rv3d.perspective_matrix.copy()
if _is_persp_matrix(persmat):
origin_start = rv3d.view_matrix.inverted()[3].to_3d()
else:
dx = (2.0 * coord[0] / region.width) - 1.0
dy = (2.0 * coord[1] / region.height) - 1.0
persinv = persmat.inverted()
viewinv = rv3d.view_matrix.inverted()
origin_start = (persinv[0].xyz * dx) + (persinv[1].xyz * dy) + viewinv[3].xyz
origin_end = origin_start + region_2d_to_vector_3d(region, rv3d, coord)
return intersect_point_line(depth_location, origin_start, origin_end)[0]