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| author | Kévin Dietrich <kevin.dietrich@mailoo.org> | 2022-04-19 17:28:14 +0300 |
|---|---|---|
| committer | Kévin Dietrich <kevin.dietrich@mailoo.org> | 2022-04-19 18:07:53 +0300 |
| commit | 2890c11cd7b008c3c261b6aa833c826c85cac504 (patch) | |
| tree | 5bc3432767fc6dd260e6fec18bd1817766572abd /intern/cycles/scene/attribute.cpp | |
| parent | 56cfd60d432bf387c21bf5bde08fece044fac99c (diff) | |
Cycles: add support for volume motion blur
This adds support for rendering motion blur for volumes, using their
velocity field. This works for fluid simulations and imported VDB
volumes. For the latter, the name of the velocity field can be set per
volume object, with automatic detection of velocity fields that are
split into 3 scalar grids.
A new parameter is also added to scale velocity for more artistic control.
Like for Alembic and USD caches, a parameter to set the unit of time in
which the velocity vectors are expressed is also added. For Blender gas
simulations, the velocity unit should always be in seconds, so this is
only exposed for volume objects which may come from external OpenVDB
files.
These parameters are available under the `Render` panels for the fluid
domain and the volume object data properties respectively.
Credits: kernel advection code from Tangent Animation's Blackbird based
on earlier work by Geraldine Chua
Differential Revision: https://developer.blender.org/D14629
Diffstat (limited to 'intern/cycles/scene/attribute.cpp')
| -rw-r--r-- | intern/cycles/scene/attribute.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/intern/cycles/scene/attribute.cpp b/intern/cycles/scene/attribute.cpp index 0ca602362bc..df01189a54b 100644 --- a/intern/cycles/scene/attribute.cpp +++ b/intern/cycles/scene/attribute.cpp @@ -360,6 +360,12 @@ const char *Attribute::standard_name(AttributeStandard std) return "temperature"; case ATTR_STD_VOLUME_VELOCITY: return "velocity"; + case ATTR_STD_VOLUME_VELOCITY_X: + return "velocity_x"; + case ATTR_STD_VOLUME_VELOCITY_Y: + return "velocity_y"; + case ATTR_STD_VOLUME_VELOCITY_Z: + return "velocity_z"; case ATTR_STD_POINTINESS: return "pointiness"; case ATTR_STD_RANDOM_PER_ISLAND: @@ -587,6 +593,9 @@ Attribute *AttributeSet::add(AttributeStandard std, ustring name) case ATTR_STD_VOLUME_FLAME: case ATTR_STD_VOLUME_HEAT: case ATTR_STD_VOLUME_TEMPERATURE: + case ATTR_STD_VOLUME_VELOCITY_X: + case ATTR_STD_VOLUME_VELOCITY_Y: + case ATTR_STD_VOLUME_VELOCITY_Z: attr = add(name, TypeDesc::TypeFloat, ATTR_ELEMENT_VOXEL); break; case ATTR_STD_VOLUME_COLOR: |