e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
/* SPDX-FileCopyrightText: 2019 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "usd_writer_camera.h"
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#include "usd_hierarchy_iterator.h"
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#include <pxr/usd/usdGeom/camera.h>
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#include <pxr/usd/usdGeom/tokens.h>
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#include "BKE_camera.h"
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#include "BLI_assert.h"
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#include "DNA_camera_types.h"
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#include "DNA_scene_types.h"
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namespace blender::io::usd {
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USDCameraWriter::USDCameraWriter(const USDExporterContext &ctx) : USDAbstractWriter(ctx) {}
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bool USDCameraWriter::is_supported(const HierarchyContext *context) const
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{
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Camera *camera = static_cast<Camera *>(context->object->data);
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return camera->type == CAM_PERSP;
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}
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static void camera_sensor_size_for_render(const Camera *camera,
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const RenderData *rd,
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float *r_sensor_x,
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float *r_sensor_y)
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{
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/* Compute the final image size in pixels. */
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float sizex = rd->xsch * rd->xasp;
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float sizey = rd->ysch * rd->yasp;
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int sensor_fit = BKE_camera_sensor_fit(camera->sensor_fit, sizex, sizey);
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switch (sensor_fit) {
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case CAMERA_SENSOR_FIT_HOR:
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*r_sensor_x = camera->sensor_x;
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*r_sensor_y = camera->sensor_x * sizey / sizex;
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break;
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case CAMERA_SENSOR_FIT_VERT:
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*r_sensor_x = camera->sensor_y * sizex / sizey;
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*r_sensor_y = camera->sensor_y;
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break;
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case CAMERA_SENSOR_FIT_AUTO:
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BLI_assert_msg(0, "Camera fit should be either horizontal or vertical");
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break;
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}
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}
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void USDCameraWriter::do_write(HierarchyContext &context)
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{
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pxr::UsdTimeCode timecode = get_export_time_code();
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pxr::UsdGeomCamera usd_camera = pxr::UsdGeomCamera::Define(usd_export_context_.stage,
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usd_export_context_.usd_path);
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Camera *camera = static_cast<Camera *>(context.object->data);
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Scene *scene = DEG_get_evaluated_scene(usd_export_context_.depsgraph);
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usd_camera.CreateProjectionAttr().Set(pxr::UsdGeomTokens->perspective);
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/* USD stores the focal length in "millimeters or tenths of world units", because at some point
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* they decided world units might be centimeters. Quite confusing, as the USD Viewer shows the
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* correct FoV when we write millimeters and not "tenths of world units".
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*/
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usd_camera.CreateFocalLengthAttr().Set(camera->lens, timecode);
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float aperture_x, aperture_y;
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camera_sensor_size_for_render(camera, &scene->r, &aperture_x, &aperture_y);
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float film_aspect = aperture_x / aperture_y;
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usd_camera.CreateHorizontalApertureAttr().Set(aperture_x, timecode);
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usd_camera.CreateVerticalApertureAttr().Set(aperture_y, timecode);
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usd_camera.CreateHorizontalApertureOffsetAttr().Set(aperture_x * camera->shiftx, timecode);
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usd_camera.CreateVerticalApertureOffsetAttr().Set(aperture_y * camera->shifty * film_aspect,
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timecode);
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usd_camera.CreateClippingRangeAttr().Set(
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pxr::VtValue(pxr::GfVec2f(camera->clip_start, camera->clip_end)), timecode);
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/* Write DoF-related attributes. */
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if (camera->dof.flag & CAM_DOF_ENABLED) {
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usd_camera.CreateFStopAttr().Set(camera->dof.aperture_fstop, timecode);
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float focus_distance = scene->unit.scale_length *
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BKE_camera_object_dof_distance(context.object);
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usd_camera.CreateFocusDistanceAttr().Set(focus_distance, timecode);
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}
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}
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} // namespace blender::io::usd
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