diff options
Diffstat (limited to 'source/blender/io/usd/intern/usd_writer_light.cc')
| -rw-r--r-- | source/blender/io/usd/intern/usd_writer_light.cc | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/source/blender/io/usd/intern/usd_writer_light.cc b/source/blender/io/usd/intern/usd_writer_light.cc new file mode 100644 index 00000000000..e13e2c58a79 --- /dev/null +++ b/source/blender/io/usd/intern/usd_writer_light.cc @@ -0,0 +1,112 @@ +/* + * 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. + * + * The Original Code is Copyright (C) 2019 Blender Foundation. + * All rights reserved. + */ +#include "usd_writer_light.h" +#include "usd_hierarchy_iterator.h" + +#include <pxr/usd/usdLux/diskLight.h> +#include <pxr/usd/usdLux/distantLight.h> +#include <pxr/usd/usdLux/rectLight.h> +#include <pxr/usd/usdLux/sphereLight.h> + +extern "C" { +#include "BLI_assert.h" +#include "BLI_utildefines.h" + +#include "DNA_light_types.h" +#include "DNA_object_types.h" +} + +namespace USD { + +USDLightWriter::USDLightWriter(const USDExporterContext &ctx) : USDAbstractWriter(ctx) +{ +} + +bool USDLightWriter::is_supported(const HierarchyContext *context) const +{ + Light *light = static_cast<Light *>(context->object->data); + return ELEM(light->type, LA_AREA, LA_LOCAL, LA_SUN); +} + +void USDLightWriter::do_write(HierarchyContext &context) +{ + pxr::UsdStageRefPtr stage = usd_export_context_.stage; + const pxr::SdfPath &usd_path = usd_export_context_.usd_path; + pxr::UsdTimeCode timecode = get_export_time_code(); + + Light *light = static_cast<Light *>(context.object->data); + pxr::UsdLuxLight usd_light; + + switch (light->type) { + case LA_AREA: + switch (light->area_shape) { + case LA_AREA_DISK: + case LA_AREA_ELLIPSE: { /* An ellipse light will deteriorate into a disk light. */ + pxr::UsdLuxDiskLight disk_light = pxr::UsdLuxDiskLight::Define(stage, usd_path); + disk_light.CreateRadiusAttr().Set(light->area_size, timecode); + usd_light = disk_light; + break; + } + case LA_AREA_RECT: { + pxr::UsdLuxRectLight rect_light = pxr::UsdLuxRectLight::Define(stage, usd_path); + rect_light.CreateWidthAttr().Set(light->area_size, timecode); + rect_light.CreateHeightAttr().Set(light->area_sizey, timecode); + usd_light = rect_light; + break; + } + case LA_AREA_SQUARE: { + pxr::UsdLuxRectLight rect_light = pxr::UsdLuxRectLight::Define(stage, usd_path); + rect_light.CreateWidthAttr().Set(light->area_size, timecode); + rect_light.CreateHeightAttr().Set(light->area_size, timecode); + usd_light = rect_light; + break; + } + } + break; + case LA_LOCAL: { + pxr::UsdLuxSphereLight sphere_light = pxr::UsdLuxSphereLight::Define(stage, usd_path); + sphere_light.CreateRadiusAttr().Set(light->area_size, timecode); + usd_light = sphere_light; + break; + } + case LA_SUN: + usd_light = pxr::UsdLuxDistantLight::Define(stage, usd_path); + break; + default: + BLI_assert(!"is_supported() returned true for unsupported light type"); + } + + /* Scale factor to get to somewhat-similar illumination. Since the USDViewer had similar + * over-exposure as Blender Internal with the same values, this code applies the reverse of the + * versioning code in light_emission_unify(). */ + float usd_intensity; + if (light->type == LA_SUN) { + /* Untested, as the Hydra GL viewport of USDViewer doesn't support distant lights. */ + usd_intensity = light->energy; + } + else { + usd_intensity = light->energy / 100.f; + } + usd_light.CreateIntensityAttr().Set(usd_intensity, timecode); + + usd_light.CreateColorAttr().Set(pxr::GfVec3f(light->r, light->g, light->b), timecode); + usd_light.CreateSpecularAttr().Set(light->spec_fac, timecode); +} + +} // namespace USD |