//------------------------------------------------------------------------------
void PointLight::GetShadowRay( const Intersection& _intersection, RayList& o_shadowRays, DisList& o_disList, float& o_attenuation ) const
{
Vector lightDir = Position() - _intersection.Position();
float dis = lightDir.Length();
o_disList.push_back(dis);
float attenuation = m_intensity /( dis*dis );
Clamp( attenuation, 0, 1);
o_attenuation = attenuation;
Normalise( lightDir );
o_shadowRays.push_back( Ray( _intersection.Position() + lightDir * EPSILON, lightDir, g_air ) );
}
//------------------------------------------------------------------------------
void AreaLight::GetShadowRay ( const Intersection& _intersection, RayList& o_shadowRays, DisList& o_disList, float& o_attenuation ) const
{
std::vector<Vector>::const_iterator iter = m_lightSamplesTransformed.begin ();
while( iter != m_lightSamplesTransformed.end() )
{
Vector lightDir = *iter - _intersection.Position();
float dis = lightDir.Length ();
o_disList.push_back( dis );
float attenuation = m_intensity / ( dis * dis );
Clamp(attenuation, 0, 1);
o_attenuation = attenuation;
Normalise( lightDir );
o_shadowRays.push_back ( Ray ( _intersection.Position () + _intersection.Normal () * 0.01, lightDir, g_air ) );
++iter;
}
}