void FrozenDisplayRenderer::capture()
{
SamplingContext::RNGType rng;
SamplingContext sampling_context(
rng,
m_sampling_mode,
2, // number of dimensions
0, // number of samples -- unknown
0); // initial instance number
size_t point_index = 0;
for (size_t ty = 0; ty < m_frame_props.m_tile_count_y; ++ty)
{
for (size_t tx = 0; tx < m_frame_props.m_tile_count_x; ++tx)
{
const Tile& color_tile = m_color_image.tile(tx, ty);
const Tile& depth_tile = m_depth_image.tile(tx, ty);
const size_t tile_width = color_tile.get_width();
const size_t tile_height = color_tile.get_height();
for (size_t py = 0; py < tile_height; ++py)
{
for (size_t px = 0; px < tile_width; ++px)
{
// Compute film point in NDC.
const Vector2d ndc =
m_frame.get_sample_position(
tx, ty,
px, py,
0.5, 0.5);
// Retrieve pixel depth.
const float depth = depth_tile.get_component<float>(px, py, 0);
if (depth >= 0.0f)
{
// Generate a world space ray going through that film point.
ShadingRay ray;
m_camera.spawn_ray(sampling_context, Dual2d(ndc), ray);
// Retrieve pixel color.
Color4f pixel;
color_tile.get_pixel(px, py, pixel);
// Compute and store world space point and color.
RenderPoint point;
point.m_position = Vector3f(ray.point_at(depth));
point.m_color = pixel.rgb();
m_points[point_index++] = point;
}
}
}
}
}
}
ScenePicker::PickingResult ScenePicker::pick(const Vector2d& ndc) const
{
SamplingContext::RNGType rng;
SamplingContext sampling_context(rng);
const Scene& scene = impl->m_trace_context.get_scene();
const Camera* camera = scene.get_camera();
ShadingRay ray;
camera->generate_ray(
sampling_context,
ndc,
ray);
ShadingPoint shading_point;
impl->m_intersector.trace(ray, shading_point);
const bool hit = shading_point.hit();
PickingResult result;
result.m_hit = hit;
result.m_distance =
hit
? shading_point.get_distance() * norm(ray.m_dir)
: shading_point.get_distance();
result.m_primitive_type = shading_point.get_primitive_type();
result.m_camera = camera;
result.m_assembly_instance = hit ? &shading_point.get_assembly_instance() : 0;
result.m_assembly = hit ? &shading_point.get_assembly() : 0;
result.m_object_instance = hit ? &shading_point.get_object_instance() : 0;
result.m_object = hit ? &shading_point.get_object() : 0;
result.m_material = 0;
result.m_surface_shader = 0;
result.m_bsdf = 0;
result.m_edf = 0;
if (hit)
{
const size_t pa_index = shading_point.get_primitive_attribute_index();
if (pa_index != Triangle::None)
{
const char* material_name =
result.m_object_instance->get_material_name(pa_index, shading_point.get_side());
if (material_name)
{
result.m_material =
InputBinder::find_entity<Material>(
material_name,
result.m_object_instance->get_parent());
}
}
}
if (result.m_material)
{
const Entity* parent = result.m_material->get_parent();
const char* ss_name = result.m_material->get_surface_shader_name();
result.m_surface_shader = ss_name ? InputBinder::find_entity<SurfaceShader>(ss_name, parent) : 0;
const char* bsdf_name = result.m_material->get_bsdf_name();
result.m_bsdf = bsdf_name ? InputBinder::find_entity<BSDF>(bsdf_name, parent) : 0;
const char* edf = result.m_material->get_edf_name();
result.m_edf = edf ? InputBinder::find_entity<EDF>(edf, parent) : 0;
}
return result;
}