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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Tangent Animation. All rights reserved. */
#include "usd_reader_light.h"
#include "BKE_light.h"
#include "BKE_object.h"
#include "DNA_light_types.h"
#include "DNA_object_types.h"
#include <pxr/usd/usdLux/light.h>
#include <pxr/usd/usdLux/diskLight.h>
#include <pxr/usd/usdLux/distantLight.h>
#include <pxr/usd/usdLux/rectLight.h>
#include <pxr/usd/usdLux/shapingAPI.h>
#include <pxr/usd/usdLux/sphereLight.h>
#include <iostream>
namespace blender::io::usd {
void USDLightReader::create_object(Main *bmain, const double /* motionSampleTime */)
{
Light *blight = static_cast<Light *>(BKE_light_add(bmain, name_.c_str()));
object_ = BKE_object_add_only_object(bmain, OB_LAMP, name_.c_str());
object_->data = blight;
}
void USDLightReader::read_object_data(Main *bmain, const double motionSampleTime)
{
Light *blight = (Light *)object_->data;
if (blight == nullptr) {
return;
}
if (!prim_) {
return;
}
pxr::UsdLuxLight light_prim(prim_);
if (!light_prim) {
return;
}
pxr::UsdLuxShapingAPI shaping_api(light_prim);
/* Set light type. */
if (prim_.IsA<pxr::UsdLuxDiskLight>()) {
blight->type = LA_AREA;
blight->area_shape = LA_AREA_DISK;
/* Ellipse lights are not currently supported */
}
else if (prim_.IsA<pxr::UsdLuxRectLight>()) {
blight->type = LA_AREA;
blight->area_shape = LA_AREA_RECT;
}
else if (prim_.IsA<pxr::UsdLuxSphereLight>()) {
blight->type = LA_LOCAL;
if (shaping_api && shaping_api.GetShapingConeAngleAttr().IsAuthored()) {
blight->type = LA_SPOT;
}
}
else if (prim_.IsA<pxr::UsdLuxDistantLight>()) {
blight->type = LA_SUN;
}
/* Set light values. */
if (pxr::UsdAttribute intensity_attr = light_prim.GetIntensityAttr()) {
float intensity = 0.0f;
if (intensity_attr.Get(&intensity, motionSampleTime)) {
blight->energy = intensity * this->import_params_.light_intensity_scale;
}
}
/* TODO(makowalsk): Not currently supported. */
#if 0
pxr::VtValue exposure;
light_prim.GetExposureAttr().Get(&exposure, motionSampleTime);
#endif
/* TODO(makowalsk): Not currently supported */
#if 0
pxr::VtValue diffuse;
light_prim.GetDiffuseAttr().Get(&diffuse, motionSampleTime);
#endif
if (pxr::UsdAttribute spec_attr = light_prim.GetSpecularAttr()) {
float spec = 0.0f;
if (spec_attr.Get(&spec, motionSampleTime)) {
blight->spec_fac = spec;
}
}
if (pxr::UsdAttribute color_attr = light_prim.GetColorAttr()) {
pxr::GfVec3f color;
if (color_attr.Get(&color, motionSampleTime)) {
blight->r = color[0];
blight->g = color[1];
blight->b = color[2];
}
}
/* TODO(makowalski): Not currently supported. */
#if 0
pxr::VtValue use_color_temp;
light_prim.GetEnableColorTemperatureAttr().Get(&use_color_temp, motionSampleTime);
#endif
/* TODO(makowalski): Not currently supported. */
#if 0
pxr::VtValue color_temp;
light_prim.GetColorTemperatureAttr().Get(&color_temp, motionSampleTime);
#endif
switch (blight->type) {
case LA_AREA:
if (blight->area_shape == LA_AREA_RECT && prim_.IsA<pxr::UsdLuxRectLight>()) {
pxr::UsdLuxRectLight rect_light(prim_);
if (!rect_light) {
break;
}
if (pxr::UsdAttribute width_attr = rect_light.GetWidthAttr()) {
float width = 0.0f;
if (width_attr.Get(&width, motionSampleTime)) {
blight->area_size = width;
}
}
if (pxr::UsdAttribute height_attr = rect_light.GetHeightAttr()) {
float height = 0.0f;
if (height_attr.Get(&height, motionSampleTime)) {
blight->area_sizey = height;
}
}
}
else if (blight->area_shape == LA_AREA_DISK && prim_.IsA<pxr::UsdLuxDiskLight>()) {
pxr::UsdLuxDiskLight disk_light(prim_);
if (!disk_light) {
break;
}
if (pxr::UsdAttribute radius_attr = disk_light.GetRadiusAttr()) {
float radius = 0.0f;
if (radius_attr.Get(&radius, motionSampleTime)) {
blight->area_size = radius * 2.0f;
}
}
}
break;
case LA_LOCAL:
if (prim_.IsA<pxr::UsdLuxSphereLight>()) {
pxr::UsdLuxSphereLight sphere_light(prim_);
if (!sphere_light) {
break;
}
if (pxr::UsdAttribute radius_attr = sphere_light.GetRadiusAttr()) {
float radius = 0.0f;
if (radius_attr.Get(&radius, motionSampleTime)) {
blight->area_size = radius;
}
}
}
break;
case LA_SPOT:
if (prim_.IsA<pxr::UsdLuxSphereLight>()) {
pxr::UsdLuxSphereLight sphere_light(prim_);
if (!sphere_light) {
break;
}
if (pxr::UsdAttribute radius_attr = sphere_light.GetRadiusAttr()) {
float radius = 0.0f;
if (radius_attr.Get(&radius, motionSampleTime)) {
blight->area_size = radius;
}
}
if (!shaping_api) {
break;
}
if (pxr::UsdAttribute cone_angle_attr = shaping_api.GetShapingConeAngleAttr()) {
float cone_angle = 0.0f;
if (cone_angle_attr.Get(&cone_angle, motionSampleTime)) {
blight->spotsize = cone_angle * ((float)M_PI / 180.0f) * 2.0f;
}
}
if (pxr::UsdAttribute cone_softness_attr = shaping_api.GetShapingConeSoftnessAttr()) {
float cone_softness = 0.0f;
if (cone_softness_attr.Get(&cone_softness, motionSampleTime)) {
blight->spotblend = cone_softness;
}
}
}
break;
case LA_SUN:
if (prim_.IsA<pxr::UsdLuxDistantLight>()) {
pxr::UsdLuxDistantLight distant_light(prim_);
if (!distant_light) {
break;
}
if (pxr::UsdAttribute angle_attr = distant_light.GetAngleAttr()) {
float angle = 0.0f;
if (angle_attr.Get(&angle, motionSampleTime)) {
blight->sun_angle = angle * (float)M_PI / 180.0f;
}
}
}
break;
}
USDXformReader::read_object_data(bmain, motionSampleTime);
}
} // namespace blender::io::usd
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