Write counterpart to VertexAccess: splits interleaved vertex bytes into typed channels. More...

#include <VertexInsertion.hpp>

Collaboration diagram for MayaFlux::Kakshya::VertexInsertion:

Public Member Functions
void	clear ()
	Empty the channel list and forget the last layout.

bool	insert_interleaved (std::span< const uint8_t > vertex_bytes, const VertexLayout &layout)
	Replace the channel list with the attributes of interleaved vertices.

const VertexLayout &	layout () const noexcept
	Layout of the last successful insertion, with vertex_count set to the decoded count.

uint32_t	vertex_count () const noexcept
	Number of vertices decoded by the last successful insertion.

	VertexInsertion (std::vector< DataVariant > &channels)
	Construct with a mutable reference to the channel list.

Static Public Member Functions
static bool	can_decode (const VertexLayout &layout) noexcept
	Whether a layout can be split into typed channels.

Private Attributes
std::vector< DataVariant > &	m_channels

VertexLayout	m_layout

Detailed Description

Write counterpart to VertexAccess: splits interleaved vertex bytes into typed channels.

Parallel to MeshInsertion and DataInsertion: holds a mutable reference to a channel list and populates it. Each VertexLayout attribute becomes one DataVariant, in layout order, holding the attribute for every vertex:

VERTEX_POSITIONS_3D, NORMALS_3D, TANGENTS_3D, COLORS_RGB -> vector<glm::vec3> TEXTURE_COORDS_2D -> vector<glm::vec2> VERTEX_COLORS_RGBA -> vector<glm::vec4> SCALAR_F32 -> vector<float>

For the canonical point, line and mesh layouts the channel order matches the slot order as_point_vertex_access() and its siblings consume, so a read channel list can be written back without reordering.

Nothing is written unless the layout and byte count are both valid.

Usage:

std::vector<DataVariant> channels;
VertexInsertion ins(channels);
if (ins.insert_interleaved(bytes, layout)) {
    auto& positions = std::get<std::vector<glm::vec3>>(channels[0]);
}

Definition at line 35 of file VertexInsertion.hpp.

The documentation for this class was generated from the following files:

Public Member Functions

Static Public Member Functions

Private Attributes

Detailed Description