write_lattice_params()

void MayaFlux::Buffers::VolumeFieldProcessor::write_lattice_params ( )

protected

Write the lattice dimensions and cell size into the staged push constant block, preserving word three.

Definition at line 136 of file VolumeFieldProcessor.cpp.

{
    if (!m_volume) {
        return;
    }
 
    auto& data = get_push_constant_data();
    if (data.size() < m_config.push_constant_size) {
        data.resize(m_config.push_constant_size);
    }
 
    const Kinesis::Lattice3D& lattice = m_volume->get_lattice();
    const glm::vec3 cell = lattice.cell_size();
 
    uint32_t preserved_3 = 0;
    float preserved_7 = 0.0F;
    std::memcpy(&preserved_3, data.data() + k_word3_offset, sizeof(uint32_t));
    std::memcpy(&preserved_7, data.data() + k_word7_offset, sizeof(float));
 
    const LatticePrefix prefix {
        .width = lattice.resolution.x,
        .height = lattice.resolution.y,
        .depth = lattice.resolution.z,
        .word3 = preserved_3,
        .cell_size_x = cell.x,
        .cell_size_y = cell.y,
        .cell_size_z = cell.z,
        .word7 = preserved_7,
    };
 
    std::memcpy(data.data(), &prefix, k_prefix_size);
}

References MayaFlux::Kinesis::Lattice3D::cell_size(), MayaFlux::Buffers::ShaderProcessor::get_push_constant_data(), MayaFlux::Buffers::ShaderProcessor::m_config, m_volume, MayaFlux::Buffers::ShaderConfig::push_constant_size, and MayaFlux::Kinesis::Lattice3D::resolution.

Referenced by on_attach(), MayaFlux::Buffers::AdvectProcessor::on_volume_ready(), MayaFlux::Buffers::BuoyancyProcessor::on_volume_ready(), and MayaFlux::Buffers::InfluxProcessor::on_volume_ready().

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