diff options
author | Michael Kowalski <makowalski> | 2021-08-03 12:55:53 +0300 |
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committer | Sybren A. Stüvel <sybren@blender.org> | 2021-08-03 13:33:36 +0300 |
commit | ea54cbe1b42efb3107285c89685f555c06997062 (patch) | |
tree | bfaf0cb2315172e330c982ae081a4299cc3dc82b /source/blender/io/usd/intern/usd_reader_camera.cc | |
parent | 28b9dd7b1f0a8d4ae56eafca188796936a6e3723 (diff) |
USD: add USD importer
This is an initial implementation of a USD importer.
This work is comprised of Tangent Animation's open source USD importer,
combined with features @makowalski had implemented.
The design is very similar to the approach taken in the Alembic
importer. The core functionality resides in a collection of "reader"
classes, each of which is responsible for converting an instance of a
USD prim to the corresponding Blender Object representation.
The flow of control for the conversion can be followed in the
`import_startjob()` and `import_endjob()` functions in `usd_capi.cc`.
The `USDStageReader` class is responsible for traversing the USD stage
and instantiating the appropriate readers.
Reviewed By: sybren, HooglyBoogly
Differential Revision: https://developer.blender.org/D10700
Diffstat (limited to 'source/blender/io/usd/intern/usd_reader_camera.cc')
-rw-r--r-- | source/blender/io/usd/intern/usd_reader_camera.cc | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/source/blender/io/usd/intern/usd_reader_camera.cc b/source/blender/io/usd/intern/usd_reader_camera.cc new file mode 100644 index 00000000000..2732ed5770d --- /dev/null +++ b/source/blender/io/usd/intern/usd_reader_camera.cc @@ -0,0 +1,100 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Adapted from the Blender Alembic importer implementation. + * + * Modifications Copyright (C) 2021 Tangent Animation. + * All rights reserved. + */ + +#include "usd_reader_camera.h" + +#include "DNA_camera_types.h" +#include "DNA_object_types.h" + +#include "BKE_camera.h" +#include "BKE_object.h" + +#include "BLI_math.h" + +#include <pxr/pxr.h> +#include <pxr/usd/usdGeom/camera.h> + +namespace blender::io::usd { + +void USDCameraReader::create_object(Main *bmain, const double /* motionSampleTime */) +{ + Camera *bcam = static_cast<Camera *>(BKE_camera_add(bmain, name_.c_str())); + + object_ = BKE_object_add_only_object(bmain, OB_CAMERA, name_.c_str()); + object_->data = bcam; +} + +void USDCameraReader::read_object_data(Main *bmain, const double motionSampleTime) +{ + Camera *bcam = (Camera *)object_->data; + + pxr::UsdGeomCamera cam_prim(prim_); + + if (!cam_prim) { + return; + } + + pxr::VtValue val; + cam_prim.GetFocalLengthAttr().Get(&val, motionSampleTime); + pxr::VtValue verApOffset; + cam_prim.GetVerticalApertureOffsetAttr().Get(&verApOffset, motionSampleTime); + pxr::VtValue horApOffset; + cam_prim.GetHorizontalApertureOffsetAttr().Get(&horApOffset, motionSampleTime); + pxr::VtValue clippingRangeVal; + cam_prim.GetClippingRangeAttr().Get(&clippingRangeVal, motionSampleTime); + pxr::VtValue focalDistanceVal; + cam_prim.GetFocusDistanceAttr().Get(&focalDistanceVal, motionSampleTime); + pxr::VtValue fstopVal; + cam_prim.GetFStopAttr().Get(&fstopVal, motionSampleTime); + pxr::VtValue projectionVal; + cam_prim.GetProjectionAttr().Get(&projectionVal, motionSampleTime); + pxr::VtValue verAp; + cam_prim.GetVerticalApertureAttr().Get(&verAp, motionSampleTime); + pxr::VtValue horAp; + cam_prim.GetHorizontalApertureAttr().Get(&horAp, motionSampleTime); + + bcam->lens = val.Get<float>(); + /* TODO(makowalski) */ +#if 0 + bcam->sensor_x = 0.0f; + bcam->sensor_y = 0.0f; +#endif + bcam->shiftx = verApOffset.Get<float>(); + bcam->shifty = horApOffset.Get<float>(); + + bcam->type = (projectionVal.Get<pxr::TfToken>().GetString() == "perspective") ? CAM_PERSP : + CAM_ORTHO; + + /* Calling UncheckedGet() to silence compiler warnings. */ + bcam->clip_start = max_ff(0.1f, clippingRangeVal.UncheckedGet<pxr::GfVec2f>()[0]); + bcam->clip_end = clippingRangeVal.UncheckedGet<pxr::GfVec2f>()[1]; + + bcam->dof.focus_distance = focalDistanceVal.Get<float>(); + bcam->dof.aperture_fstop = static_cast<float>(fstopVal.Get<float>()); + + if (bcam->type == CAM_ORTHO) { + bcam->ortho_scale = max_ff(verAp.Get<float>(), horAp.Get<float>()); + } + + USDXformReader::read_object_data(bmain, motionSampleTime); +} + +} // namespace blender::io::usd |