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/* SPDX-License-Identifier: GPL-2.0-or-later
* Adapted from the Blender Alembic importer implementation.
* Modifications Copyright 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): support sensor size. */
#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 = 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
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