position_at()

std::optional< glm::vec3 > MayaFlux::Kinesis::position_at ( std::span< const std::byte >  bytes, size_t  stride, size_t  offset, size_t  index  )

inlinenoexcept

Position of one record in interleaved vertex bytes.

Parameters

bytes	Interleaved records.
stride	Bytes per record.
offset	Byte offset of the vec3 position within a record.
index	Record index.

Returns

The position, or nullopt when the position does not lie inside bytes or stride is too small to hold it.

Definition at line 147 of file Morphology.hpp.

{
    if (stride < offset + sizeof(glm::vec3)
        || index * stride + offset + sizeof(glm::vec3) > bytes.size())
        return std::nullopt;
    glm::vec3 p;
    std::memcpy(&p, bytes.data() + index * stride + offset, sizeof(glm::vec3));
    return p;
}

References index, and offset.

Referenced by centroid(), and surface_centroid().

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