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#ifndef OPENMW_COMPONENTS_LIGHTUTIL_H
#define OPENMW_COMPONENTS_LIGHTUTIL_H
#include <osg/Vec4f>
#include <osg/ref_ptr>
namespace osg
{
class Group;
class Light;
}
namespace ESM
{
struct Light;
}
namespace SceneUtil
{
class LightSource;
struct LightCommon;
/// @brief Set up global attenuation settings for an osg::Light.
/// @param radius The radius of the light source.
/// @param isExterior Is the light outside? May be used for deciding which attenuation settings to use.
void configureLight(osg::Light* light, float radius, bool isExterior);
/// @brief Convert an ESM::Light to a SceneUtil::LightSource, and add it to a sub graph.
/// @note If the sub graph contains a node named "AttachLight" (case insensitive), then the light is added to that.
/// Otherwise, the light is attached directly to the root node of the subgraph.
/// @param node The sub graph to add a light to
/// @param esmLight The light definition coming from the game files containing radius, color, flicker, etc.
/// @param lightMask Mask to assign to the newly created LightSource.
/// @param isExterior Is the light outside? May be used for deciding which attenuation settings to use.
osg::ref_ptr<LightSource> addLight(
osg::Group* node, const SceneUtil::LightCommon& esmLight, unsigned int lightMask, bool isExterior);
/// @brief Convert an ESM::Light to a SceneUtil::LightSource, and return it.
/// @param esmLight The light definition coming from the game files containing radius, color, flicker, etc.
/// @param lightMask Mask to assign to the newly created LightSource.
/// @param isExterior Is the light outside? May be used for deciding which attenuation settings to use.
/// @param ambient Ambient component of the light.
osg::ref_ptr<LightSource> createLightSource(const SceneUtil::LightCommon& esmLight, unsigned int lightMask,
bool isExterior, const osg::Vec4f& ambient = osg::Vec4f(0, 0, 0, 1));
}
#endif
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