Tracer::Tracer(
const Scene& scene,
const Intersector& intersector,
TextureCache& texture_cache,
#ifdef WITH_OSL
OSLShaderGroupExec* shadergroup_exec,
#endif
const float transparency_threshold,
const size_t max_iterations,
const bool print_details)
: m_intersector(intersector)
, m_texture_cache(texture_cache)
#ifdef WITH_OSL
, m_shadergroup_exec(shadergroup_exec)
#endif
, m_assume_no_alpha_mapping(!uses_alpha_mapping(scene))
, m_transmission_threshold(static_cast<double>(transparency_threshold))
, m_max_iterations(max_iterations)
{
if (print_details)
{
if (m_assume_no_alpha_mapping)
RENDERER_LOG_DEBUG("the scene does not rely on alpha mapping; using probe tracing.");
else RENDERER_LOG_DEBUG("the scene uses alpha mapping; using standard tracing.");
}
}
bool ObjectInstance::on_frame_begin(
const Project& project,
const BaseGroup* parent,
OnFrameBeginRecorder& recorder,
IAbortSwitch* abort_switch)
{
if (!Entity::on_frame_begin(project, parent, recorder, abort_switch))
return false;
m_transform_swaps_handedness = get_transform().swaps_handedness();
const EntityDefMessageContext context("object instance", this);
if (uses_alpha_mapping())
{
if (m_front_materials != m_back_materials)
{
RENDERER_LOG_WARNING(
"%s: object instance uses alpha mapping on one side (or both) but materials are different on front and back faces; "
"this may lead to unexpected or unphysical results since the direction of shadow rays is unpredictable.",
context.get());
}
}
return true;
}
bool ObjectInstance::on_frame_begin(
const Project& project,
const Assembly& assembly,
IAbortSwitch* abort_switch)
{
const EntityDefMessageContext context("object instance", this);
if (uses_alpha_mapping())
{
if (m_front_materials != m_back_materials)
{
RENDERER_LOG_WARNING(
"%s: object instance uses alpha mapping on one side (or both) but materials are different on front and back faces; "
"this may lead to unexpected or unphysical results since the direction of shadow rays is unpredictable.",
context.get());
}
}
return true;
}
