void MultiResSILLayer::ExtractVPLs(CameraPtr const & rsm_camera, LightSourcePtr const & light)
{
rsm_texs_[0]->BuildMipSubLevels();
rsm_texs_[1]->BuildMipSubLevels();
rsm_to_depth_derivate_pp_->Apply();
float4x4 ls_to_es = rsm_camera->InverseViewMatrix() * g_buffer_camera_->ViewMatrix();
float4x4 const & inv_proj = rsm_camera->InverseProjMatrix();
LightSource::LightType type = light->Type();
float4 vpl_params(static_cast<float>(VPL_COUNT), 2.0f,
static_cast<float>(MIN_RSM_MIPMAP_SIZE), static_cast<float>(MIN_RSM_MIPMAP_SIZE * MIN_RSM_MIPMAP_SIZE));
rsm_to_vpls_pps_[type]->SetParam(0, ls_to_es);
rsm_to_vpls_pps_[type]->SetParam(1, vpl_params);
rsm_to_vpls_pps_[type]->SetParam(2, light->Color());
rsm_to_vpls_pps_[type]->SetParam(3, light->CosOuterInner());
rsm_to_vpls_pps_[type]->SetParam(4, light->Falloff());
rsm_to_vpls_pps_[type]->SetParam(5, g_buffer_camera_->InverseViewMatrix());
float3 upper_left = MathLib::transform_coord(float3(-1, +1, 1), inv_proj);
float3 upper_right = MathLib::transform_coord(float3(+1, +1, 1), inv_proj);
float3 lower_left = MathLib::transform_coord(float3(-1, -1, 1), inv_proj);
rsm_to_vpls_pps_[type]->SetParam(6, upper_left);
rsm_to_vpls_pps_[type]->SetParam(7, upper_right - upper_left);
rsm_to_vpls_pps_[type]->SetParam(8, lower_left - upper_left);
rsm_to_vpls_pps_[type]->SetParam(9, int2(1, 0));
rsm_to_vpls_pps_[type]->SetParam(10, 0.12f * rsm_camera->FarPlane());
rsm_to_vpls_pps_[type]->SetParam(11, static_cast<float>(rsm_texs_[0]->NumMipMaps() - 1));
rsm_to_vpls_pps_[type]->Apply();
}
void MultiResSILLayer::VPLsLighting(LightSourcePtr const & light)
{
RenderEngine& re = Context::Instance().RenderFactoryInstance().RenderEngineInstance();
RenderDeviceCaps const & caps = re.DeviceCaps();
*vpl_view_param_ = g_buffer_camera_->ViewMatrix();
*vpl_proj_param_ = g_buffer_camera_->ProjMatrix();;
*vpl_depth_near_far_invfar_param_ = float3(g_buffer_camera_->NearPlane(),
g_buffer_camera_->FarPlane(), 1 / g_buffer_camera_->FarPlane());
float3 p = MathLib::transform_coord(light->Position(), g_buffer_camera_->ViewMatrix());
*vpl_light_pos_es_param_ = float4(p.x(), p.y(), p.z(), 1);
*vpl_light_color_param_ = light->Color();
*vpl_light_falloff_param_ = light->Falloff();
*vpl_gbuffer_tex_param_ = g_buffer_texs_[0];
*vpl_depth_tex_param_ = g_buffer_depth_tex_;
for (size_t i = 0; i < vpls_lighting_fbs_.size(); ++ i)
{
re.BindFrameBuffer(vpls_lighting_fbs_[i]);
if (caps.instance_id_support)
{
re.Render(*vpls_lighting_instance_id_tech_, *rl_vpl_);
}
else
{
for (int j = 0; j < VPL_COUNT; ++ j)
{
*vpl_x_coord_param_ = (j + 0.5f) / VPL_COUNT;
re.Render(*vpls_lighting_no_instance_id_tech_, *rl_vpl_);
}
}
}
}