mill_runs()

uint32_t MayaFlux::Buffers::RenderProcessor::mill_runs ( const std::shared_ptr< VKBuffer > &  buffer, Portal::Graphics::PrimitiveMill &  mill  )

private

Mill m_runs into this attachment's output.

Returns

Number of vertices prepared for drawing.

Definition at line 659 of file RenderProcessor.cpp.

{
    std::span<const Portal::Graphics::DrawRun> runs = m_runs;
 
    Portal::Graphics::DrawRun whole {};
    if (runs.empty()) {
        const auto layout = buffer->get_vertex_layout();
        const uint32_t count = m_vertex_count > 0
            ? m_vertex_count
            : (layout.has_value() ? layout->vertex_count : 0U);
 
        if (count == 0) {
            return 0;
        }
 
        whole = { .topology = m_primitive_topology,
            .vertex_offset = m_first_vertex,
            .vertex_count = count };
        runs = { &whole, 1 };
    }
 
    glm::vec3 eye = m_view_transform_active
        ? glm::vec3(glm::inverse(published_render_transform().view_transform.view)[3])
        : glm::vec3(0.0F, 0.0F, 1.0e4F);
 
    if (m_mill_spec.ribbon == Portal::Graphics::MillSpec::Ribbon::WorldFacing
        && (m_geometry_transform || m_geometry_transform_source)) {
        const auto& geometry = published_render_transform().geometry;
        const float determinant = glm::determinant(geometry);
        if (std::isfinite(determinant) && determinant != 0.0F) {
            const glm::vec4 local_eye = glm::inverse(geometry) * glm::vec4(eye, 1.0F);
            if (std::isfinite(local_eye.x) && std::isfinite(local_eye.y)
                && std::isfinite(local_eye.z) && std::isfinite(local_eye.w)
                && local_eye.w != 0.0F) {
                eye = glm::vec3(local_eye) / local_eye.w;
            }
        }
    }
 
    const Portal::Graphics::MillView view { .eye = eye };
 
    return mill.mill(buffer, runs, view);
}

References buffer, count, MayaFlux::Portal::Graphics::MillView::eye, MayaFlux::Portal::Graphics::PrimitiveMill::mill(), MayaFlux::Portal::Graphics::DrawRun::topology, and MayaFlux::Portal::Graphics::MillSpec::WorldFacing.

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