The Color that the area around this corner of a triangle should be tinted.

A normalized Vector representing a direction facing away from (perpendicular to) the surface of the triangle that this vertex is a part of.

Many shaders use this to calculate lighting.

A normalized Vector representing a direction facing along (parallel with) the surface of the triangle that this vertex is a part of.

A normalized Vector representing a direction facing away from (perpendicular to) both the vertex's normal and tangent directions.

This is the result of a Cross Product between the vertex's normal and tangent directions.

The position of the vertex in local space.

The horizontal coordinate of a position on the texture of the triangle that this vertex is a part of.
This controls which part of the texture is drawn at this vertex.

In the range 0 (the texture's left edge) to 1 (the texture's right edge)

The vertical coordinate of a position on the texture of the triangle that this vertex is a part of.
This controls which part of the texture is drawn at this vertex.

In the range 0 (the texture's top edge) to 1 (the texture's bottom edge)

A secondary U texture coordinate used by some shaders like LightmappedGeneric.

Currently used exclusively by IMesh:BuildFromTriangles.

A secondary V texture coordinate used by some shaders like LightmappedGeneric.

Currently used exclusively by IMesh:BuildFromTriangles.

A sequential table of four numbers whose purpose and expected values are determined by the shader.

Many Source Engine shaders to hold tangent information of the vertex in the order tangentX, tangentY, tangentZ, tangentHandedness.

A sequential table of all the BoneWeight structures that affect this vertex.

The total sum of their weight values should be 1

Current added exclusively by util.GetModelMeshes