set_vertex()

void MayaFlux::Nodes::GpuSync::GeometryWriterNode::set_vertex	(	uint32_t	vertex_index,
		const void *	data,
		size_t	size_bytes
	)

Set a single vertex by index.

Parameters

vertex_index	Index of vertex to set
data	Pointer to vertex data
size_bytes	Size of vertex data (should match stride)

Copies size_bytes starting at (vertex_index * stride).

Definition at line 84 of file GeometryWriterNode.cpp.

{
    if (!data || size_bytes == 0) {
        MF_ERROR(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "Cannot set vertex: null data or zero size");
        return;
    }
 
    if (m_vertex_stride == 0) {
        MF_ERROR(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "Cannot set vertex: stride is 0");
        return;
    }
 
    if (vertex_index >= m_vertex_count) {
        MF_ERROR(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "Vertex index {} out of range (count: {})",
            vertex_index, m_vertex_count);
        return;
    }
 
    if (size_bytes > m_vertex_stride) {
        MF_WARN(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "Vertex data size {} exceeds stride {}; truncating",
            size_bytes, m_vertex_stride);
        size_bytes = m_vertex_stride;
    }
 
    const size_t offset = static_cast<size_t>(vertex_index) * m_vertex_stride;
 
    if (offset + size_bytes > m_vertex_buffer.size()) {
        MF_ERROR(Journal::Component::Nodes, Journal::Context::NodeProcessing,
            "Vertex {} lies beyond the vertex buffer ({} bytes)",
            vertex_index, m_vertex_buffer.size());
        return;
    }
 
    std::memcpy(m_vertex_buffer.data() + offset, data, size_bytes);
 
    MF_TRACE(Journal::Component::Nodes, Journal::Context::NodeProcessing,
        "GeometryWriterNode: Set vertex {} ({} bytes)", vertex_index, size_bytes);
 
    m_vertex_data_dirty = true;
}

References m_vertex_buffer, m_vertex_count, m_vertex_data_dirty, m_vertex_stride, MF_ERROR, MF_TRACE, MF_WARN, MayaFlux::Journal::NodeProcessing, MayaFlux::Journal::Nodes, and offset.