def calculate_view_axis(context):
if context.area.type != 'VIEW_3D':
return None, None
region = context.region
rv3d = context.region_data
if rv3d is None:
return None, None
# Get the view ray from center of screen
coord = Vector((int(region.width / 2), int(region.height / 2)))
view_vector = view3d_utils.region_2d_to_vector_3d(region, rv3d, coord)
# Get the up vector. The default scene view camera is pointed
# downward, with up on Y axis. Apply view rotation to get current up
view_up_vector = rv3d.view_rotation * Vector((0.0, 1.0, 0.0))
plane_normal = sprytile_utils.snap_vector_to_axis(view_vector,
mirrored=True)
up_vector = sprytile_utils.snap_vector_to_axis(view_up_vector)
# calculated vectors are not perpendicular, don't set data
if plane_normal.dot(up_vector) != 0.0:
return None, None
return plane_normal, up_vector
def find_view_axis(context):
if context.area.type != 'VIEW_3D':
return
scene = context.scene
if scene.sprytile_data.lock_normal is True:
return
region = context.region
rv3d = context.region_data
if rv3d is None:
return
# Get the view ray from center of screen
coord = Vector((int(region.width / 2), int(region.height / 2)))
view_vector = view3d_utils.region_2d_to_vector_3d(region, rv3d, coord)
# Get the up vector. The default scene view camera is pointed
# downward, with up on Y axis. Apply view rotation to get current up
view_up_vector = rv3d.view_rotation * Vector((0.0, 1.0, 0.0))
plane_normal = sprytile_utils.snap_vector_to_axis(view_vector,
mirrored=True)
up_vector = sprytile_utils.snap_vector_to_axis(view_up_vector)
# calculated vectors are not perpendicular, don't set data
if plane_normal.dot(up_vector) != 0.0:
return
scene.sprytile_data.paint_normal_vector = plane_normal
scene.sprytile_data.paint_up_vector = up_vector
if abs(plane_normal.x) > 0:
new_mode = 'X'
elif abs(plane_normal.y) > 0:
new_mode = 'Y'
else:
new_mode = 'Z'
return new_mode
