<structure> <realm>Shared</realm> <description> A <page>table</page> structure representing the data stored by a single vertex of a mesh. MeshVertex structures are usually grouped together in sets of 3 to define the corners of a triangle. <note> Not all MeshVertex will contain all fields and not all fields are used by all shaders Information on the fields used by most Source Engine shaders (Like `VertexLitGeneric`, `UnlitGeneric`, etc.) can be found [on the Valve Developer Wiki here.](https://developer.valvesoftware.com/wiki/Category:Shaders) </note> Returned by: * <page>util.GetModelMeshes</page> * <page>PhysObj:GetMesh</page> Used by: * <page>IMesh:BuildFromTriangles</page> * <page>Entity:PhysicsFromMesh</page> </description> <fields> <item name="color" type="Color"> The <page>Color</page> that the area around this corner of a triangle should be tinted. </item> <item name="normal" type="Vector"> A normalized <page>Vector</page> 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. </item> <item name="tangent" type="Vector"> A normalized <page>Vector</page> representing a direction facing along (parallel with) the surface of the triangle that this vertex is a part of. </item> <item name="binormal" type="Vector"> A normalized <page>Vector</page> representing a direction facing away from (perpendicular to) both the vertex's normal and tangent directions. This is the result of a <page text="Cross Product">Vector:Cross</page> between the vertex's normal and tangent directions. </item> <item name="pos" type="Vector"> The position of the vertex in local space. </item> <item name="u" type="number"> The horizontal coordinate of a position on the texture of the triangle that this vertex is a part of. 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) </item> <item name="v" type="number"> The vertical coordinate of a position on the texture of the triangle that this vertex is a part of. 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) </item> <item name="u1" type="number" added="2024.02.28"> A secondary U texture coordinate used by some shaders like `LightmappedGeneric`. Currently used exclusively by <page>IMesh:BuildFromTriangles</page>. </item> <item name="v1" type="number" added="2024.02.28"> A secondary V texture coordinate used by some shaders like `LightmappedGeneric`. Currently used exclusively by <page>IMesh:BuildFromTriangles</page>. </item> <item name="userdata" type="table"> A table of four numbers whose purpose and expected values are determined by the shader. 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`. </item>⤶ <item name="weights" type="table">⤶ A sequential table of all the <page text="BoneWeight structures">Structures/BoneWeight</page> that affect this vertex.⤶ ⤶ The total sum of their `weight` values should be `1`⤶ ⤶ Current added exclusively by <page>util.GetModelMeshes</page>⤶ </item> </fields> </structure>