7a9284107d
Fix various issues in import and export of cameras. * Wrong units and flipped shift values on import * Wrong clip start lower range on import * Wrong units for aperture and focal length properties on export * Issue with auto sensor fit and height > width on export Pull Request: https://projects.blender.org/blender/blender/pulls/112905
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
/* SPDX-FileCopyrightText: 2019 Blender Authors
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#include "usd_writer_camera.h"
|
|
#include "usd_hierarchy_iterator.h"
|
|
|
|
#include <pxr/usd/usdGeom/camera.h>
|
|
#include <pxr/usd/usdGeom/tokens.h>
|
|
|
|
#include "BKE_camera.h"
|
|
#include "BLI_assert.h"
|
|
|
|
#include "DNA_camera_types.h"
|
|
#include "DNA_scene_types.h"
|
|
|
|
namespace blender::io::usd {
|
|
|
|
USDCameraWriter::USDCameraWriter(const USDExporterContext &ctx) : USDAbstractWriter(ctx) {}
|
|
|
|
bool USDCameraWriter::is_supported(const HierarchyContext *context) const
|
|
{
|
|
Camera *camera = static_cast<Camera *>(context->object->data);
|
|
return camera->type == CAM_PERSP;
|
|
}
|
|
|
|
static void camera_sensor_size_for_render(const Camera *camera,
|
|
const RenderData *rd,
|
|
float *r_sensor,
|
|
float *r_sensor_x,
|
|
float *r_sensor_y)
|
|
{
|
|
/* Compute the final image size in pixels. */
|
|
float sizex = rd->xsch * rd->xasp;
|
|
float sizey = rd->ysch * rd->yasp;
|
|
|
|
int sensor_fit = BKE_camera_sensor_fit(camera->sensor_fit, sizex, sizey);
|
|
float sensor_size = BKE_camera_sensor_size(
|
|
camera->sensor_fit, camera->sensor_x, camera->sensor_y);
|
|
*r_sensor = sensor_size;
|
|
|
|
switch (sensor_fit) {
|
|
case CAMERA_SENSOR_FIT_HOR:
|
|
*r_sensor_x = sensor_size;
|
|
*r_sensor_y = sensor_size * sizey / sizex;
|
|
break;
|
|
case CAMERA_SENSOR_FIT_VERT:
|
|
*r_sensor_x = sensor_size * sizex / sizey;
|
|
*r_sensor_y = sensor_size;
|
|
break;
|
|
case CAMERA_SENSOR_FIT_AUTO:
|
|
BLI_assert_msg(0, "Camera fit should be either horizontal or vertical");
|
|
break;
|
|
}
|
|
}
|
|
|
|
void USDCameraWriter::do_write(HierarchyContext &context)
|
|
{
|
|
pxr::UsdTimeCode timecode = get_export_time_code();
|
|
pxr::UsdGeomCamera usd_camera = pxr::UsdGeomCamera::Define(usd_export_context_.stage,
|
|
usd_export_context_.usd_path);
|
|
|
|
Camera *camera = static_cast<Camera *>(context.object->data);
|
|
Scene *scene = DEG_get_evaluated_scene(usd_export_context_.depsgraph);
|
|
|
|
usd_camera.CreateProjectionAttr().Set(pxr::UsdGeomTokens->perspective);
|
|
|
|
/*
|
|
* For USD, these camera properties are in tenths of a world unit.
|
|
* https://graphics.pixar.com/usd/release/api/class_usd_geom_camera.html#UsdGeom_CameraUnits
|
|
*
|
|
* tenth_unit_to_meters = stage_meters_per_unit / 10
|
|
* tenth_unit_to_millimeters = 1000 * unit_to_tenth_unit
|
|
* = 100 * stage_meters_per_unit
|
|
*/
|
|
const float tenth_unit_to_mm = 100.0f * scene->unit.scale_length;
|
|
|
|
float sensor_size, aperture_x, aperture_y;
|
|
camera_sensor_size_for_render(camera, &scene->r, &sensor_size, &aperture_x, &aperture_y);
|
|
|
|
usd_camera.CreateFocalLengthAttr().Set(camera->lens / tenth_unit_to_mm, timecode);
|
|
usd_camera.CreateHorizontalApertureAttr().Set(aperture_x / tenth_unit_to_mm, timecode);
|
|
usd_camera.CreateVerticalApertureAttr().Set(aperture_y / tenth_unit_to_mm, timecode);
|
|
usd_camera.CreateHorizontalApertureOffsetAttr().Set(
|
|
sensor_size * camera->shiftx / tenth_unit_to_mm, timecode);
|
|
usd_camera.CreateVerticalApertureOffsetAttr().Set(
|
|
sensor_size * camera->shifty / tenth_unit_to_mm, timecode);
|
|
|
|
usd_camera.CreateClippingRangeAttr().Set(
|
|
pxr::VtValue(pxr::GfVec2f(camera->clip_start, camera->clip_end)), timecode);
|
|
|
|
/* Write DoF-related attributes. */
|
|
if (camera->dof.flag & CAM_DOF_ENABLED) {
|
|
usd_camera.CreateFStopAttr().Set(camera->dof.aperture_fstop, timecode);
|
|
|
|
float focus_distance = BKE_camera_object_dof_distance(context.object);
|
|
usd_camera.CreateFocusDistanceAttr().Set(focus_distance, timecode);
|
|
}
|
|
}
|
|
|
|
} // namespace blender::io::usd
|