seed() [1/2]

void MayaFlux::Buffers::VolumeGridBuffer::seed	(	const std::string &	name,
		const Kinesis::SpatialField &	field
	)

Write initial values into a scalar field from a Kinesis field.

Parameters

name	Field name. Must have stride sizeof(float).
field	Sampled at each cell centre in world space.

Definition at line 459 of file VolumeGridBuffer.cpp.

{
    const auto* decl = find_field(name, "seed");
    if (!decl) {
        return;
    }
 
    if (decl->stride_bytes != sizeof(float)) {
        MF_ERROR(Journal::Component::Buffers, Journal::Context::BufferManagement,
            "VolumeGridBuffer::seed: field '{}' has stride {}, SpatialField requires {}",
            name, decl->stride_bytes, sizeof(float));
        return;
    }
 
    const glm::uvec3 res = m_lattice.resolution;
    std::vector<float> values(m_lattice.cell_count());
 
    size_t i = 0;
    for (uint32_t z = 0; z < res.z; ++z) {
        for (uint32_t y = 0; y < res.y; ++y) {
            for (uint32_t x = 0; x < res.x; ++x) {
                values[i++] = field(m_lattice.cell_center({ x, y, z }));
            }
        }
    }
 
    seed_raw(name, values.data(), values.size() * sizeof(float));
}

References MayaFlux::Journal::BufferManagement, MayaFlux::Journal::Buffers, MayaFlux::Kinesis::Lattice3D::cell_center(), MayaFlux::Kinesis::Lattice3D::cell_count(), find_field(), m_lattice, MF_ERROR, MayaFlux::Kinesis::Lattice3D::resolution, and seed_raw().

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