jamie/soundobjects_blender_addon
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Merge remote-tracking branch 'origin/master'

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Jamie Hardt
2020-09-26 16:42:13 -07:00
parent 6b6bbfe934 9402503a7f
commit 6054715931
1 changed files with 18 additions and 5 deletions
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23
sound_objects/intern/geom_utils.py
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@@ -45,11 +45,20 @@ def room_norm_vector(vec, room_size=1.) -> Vector:
The room is a cube with the camera at its center. We use a chebyshev normalization The room is a cube with the camera at its center. We use a chebyshev normalization
to convert a vector in world or camera space into a vector the represents the projection to convert a vector in world or camera space into a vector the represents the projection
of that vector onto the room's walls. of that vector onto the room's walls. The Room Vector is the immediate the X, Y and Z
coordinate of the corresponding ADM Block Format source object position.
The Pro Tools/Dolby Atmos workflow I am targeting uses "Room Centric" panner coordinates The Pro Tools/Dolby Atmos workflow I am targeting uses "Room Centric" panner coordinates
("cartesian allocentric coordinates" in ADM speak) and this process seems to yield good ("cartesian allocentric coordinates" in ADM speak) and this process seems to yield good
results. results.
I also experimented with using normalized camera frame coordinates from the
bpy_extras.object_utils.world_to_camera_view method and this gives very good results as
long as the object is on-screen; coordinates for objects off the screen are unusable.
In the future it would be worth exploring wether there's a way to produce ADM
coordinates that are "Screen-accurate" while the object is on-screen, but still gives
sensible results when the object is off-screen as well.
""" """
chebyshev = norm(vec, ord=numpy.inf) chebyshev = norm(vec, ord=numpy.inf)
if chebyshev < room_size: if chebyshev < room_size:
@@ -59,6 +68,12 @@ def room_norm_vector(vec, room_size=1.) -> Vector:
def closest_approach_to_camera(scene, speaker_object) -> (float, int): def closest_approach_to_camera(scene, speaker_object) -> (float, int):
"""
The distance and frame number of `speaker_object`s closest point to
the scene's camera.
(Works for any object, not just speakers.)
"""
max_dist = sys.float_info.max max_dist = sys.float_info.max
at_time = scene.frame_start at_time = scene.frame_start
for frame in range(scene.frame_start, scene.frame_end + 1): for frame in range(scene.frame_start, scene.frame_end + 1):
@@ -75,9 +90,7 @@ def closest_approach_to_camera(scene, speaker_object) -> (float, int):
def speaker_active_time_range(speaker) -> FrameInterval: def speaker_active_time_range(speaker) -> FrameInterval:
""" """
The time range this speaker must control in order to sound right. The time range of the first strip, of the first NLA Track of this speaker.
At this time this is assuming the str
""" """
start, end = 0xffffffff, -0xffffffff start, end = 0xffffffff, -0xffffffff
for track in speaker.animation_data.nla_tracks: for track in speaker.animation_data.nla_tracks:
@@ -99,4 +112,4 @@ def speakers_by_min_distance(scene, speakers):
def speakers_by_start_time(speaker_objs): def speakers_by_start_time(speaker_objs):
return sorted(speaker_objs, key=(lambda spk: speaker_active_time_range(spk).start_frame)) return sorted(speaker_objs, key=(lambda spk: speaker_active_time_range(spk).start_frame))