ea54cbe1b4
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
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Adapted from the Blender Alembic importer implementation.
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*
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* Modifications Copyright (C) 2021 Tangent Animation.
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* All rights reserved.
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*/
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#include "usd_reader_camera.h"
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#include "DNA_camera_types.h"
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#include "DNA_object_types.h"
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#include "BKE_camera.h"
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#include "BKE_object.h"
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#include "BLI_math.h"
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#include <pxr/pxr.h>
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#include <pxr/usd/usdGeom/camera.h>
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namespace blender::io::usd {
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void USDCameraReader::create_object(Main *bmain, const double /* motionSampleTime */)
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{
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Camera *bcam = static_cast<Camera *>(BKE_camera_add(bmain, name_.c_str()));
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object_ = BKE_object_add_only_object(bmain, OB_CAMERA, name_.c_str());
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object_->data = bcam;
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}
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void USDCameraReader::read_object_data(Main *bmain, const double motionSampleTime)
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{
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Camera *bcam = (Camera *)object_->data;
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pxr::UsdGeomCamera cam_prim(prim_);
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if (!cam_prim) {
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return;
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}
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pxr::VtValue val;
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cam_prim.GetFocalLengthAttr().Get(&val, motionSampleTime);
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pxr::VtValue verApOffset;
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cam_prim.GetVerticalApertureOffsetAttr().Get(&verApOffset, motionSampleTime);
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pxr::VtValue horApOffset;
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cam_prim.GetHorizontalApertureOffsetAttr().Get(&horApOffset, motionSampleTime);
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pxr::VtValue clippingRangeVal;
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cam_prim.GetClippingRangeAttr().Get(&clippingRangeVal, motionSampleTime);
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pxr::VtValue focalDistanceVal;
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cam_prim.GetFocusDistanceAttr().Get(&focalDistanceVal, motionSampleTime);
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pxr::VtValue fstopVal;
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cam_prim.GetFStopAttr().Get(&fstopVal, motionSampleTime);
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pxr::VtValue projectionVal;
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cam_prim.GetProjectionAttr().Get(&projectionVal, motionSampleTime);
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pxr::VtValue verAp;
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cam_prim.GetVerticalApertureAttr().Get(&verAp, motionSampleTime);
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pxr::VtValue horAp;
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cam_prim.GetHorizontalApertureAttr().Get(&horAp, motionSampleTime);
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bcam->lens = val.Get<float>();
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/* TODO(makowalski) */
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#if 0
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bcam->sensor_x = 0.0f;
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bcam->sensor_y = 0.0f;
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#endif
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bcam->shiftx = verApOffset.Get<float>();
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bcam->shifty = horApOffset.Get<float>();
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bcam->type = (projectionVal.Get<pxr::TfToken>().GetString() == "perspective") ? CAM_PERSP :
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CAM_ORTHO;
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/* Calling UncheckedGet() to silence compiler warnings. */
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bcam->clip_start = max_ff(0.1f, clippingRangeVal.UncheckedGet<pxr::GfVec2f>()[0]);
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bcam->clip_end = clippingRangeVal.UncheckedGet<pxr::GfVec2f>()[1];
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bcam->dof.focus_distance = focalDistanceVal.Get<float>();
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bcam->dof.aperture_fstop = static_cast<float>(fstopVal.Get<float>());
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if (bcam->type == CAM_ORTHO) {
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bcam->ortho_scale = max_ff(verAp.Get<float>(), horAp.Get<float>());
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}
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USDXformReader::read_object_data(bmain, motionSampleTime);
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}
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} // namespace blender::io::usd
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