Defines declaration usage for a vertex declaration.
Definition
Visual Basic
Public Enum DeclarationUsage
C#
public enum DeclarationUsage
C++
public enum class DeclarationUsage
JScript
public enum DeclarationUsage
Members
Member
Value
Description
Depth
12
Vertex data contains depth data.
Sample
13
Vertex data contains sampler data. (Sample with VertexElement.UsageIndex = 0) specifies the displacement value to look up. This flag can be used only with LookUpPresampled or LookUp.
Fog
11
Vertex data contains fog data. (Fog with VertexElement.UsageIndex = 0) specifies a fog blend value to use after pixel shading is finished. This flag applies to pixel shaders prior to version ps_3_0.
PositionTransformed
9
Vertex data contains transformed position data. (PositionTransformed with VertexElement.UsageIndex = 0) specifies the transformed position. When a declaration that contains this flag is set, the pipeline does not perform vertex processing.
TessellateFactor
8
Single positive floating-point value. (TessellateFactor with VertexElement.UsageIndex = 0) specifies a tessellation factor used in the tessellation unit to control the rate of tessellation. For more information about the data type, see Float1.
BiNormal
7
Vertex binormal data.
Tangent
6
Vertex tangent data.
TextureCoordinate
5
Texture coordinate data. (TextureCoordinate, n) specifies texture coordinates in fixed function vertex processing and in pixel shaders prior to ps_3_0. These coordinates can be used to pass user-defined data.
BlendIndices
2
Blending indices data. (BlendIndices with VertexElement.UsageIndex = 0) specifies matrix indices for fixed function vertex processing using indexed paletted skinning.
BlendWeight
1
Blending weight data. (BlendWeight with VertexElement.UsageIndex = 0) specifies the blend weights in fixed function vertex processing.
Color
10
Vertex data contains diffuse or specular color. (Color with VertexElement.UsageIndex = 0) specifies the diffuse color in the fixed function vertex shader and in pixel shaders prior to ps_3_0. (Color with VertexElement.UsageIndex = 1) specifies the specular color in the fixed function vertex shader and in pixel shaders prior to ps_3_0.
PointSize
4
Point size data. (PointSize with VertexElement.UsageIndex = 0) specifies the point-size attribute used by the setup engine of the rasterizer to expand a point into a quad for the point-sprite functionality.
Normal
3
Vertex normal data. (Normal with VertexElement.UsageIndex = 0) specifies vertex normals for fixed function vertex processing and the N-patch tessellator. (Normal with VertexElement.UsageIndex = 1) specifies vertex normals for fixed function vertex processing for skinning.
Position
0
Position data. (Position with VertexElement.UsageIndex = 0 ) specifies the nontransformed position in fixed function vertex processing and the N-patch tessellator. (Position with VertexElement.UsageIndex = 1) specifies the nontransformed position in the fixed function vertex shader for skinning.
Remarks
Vertex data is declared with an array of VertexElement structures. Each element in the array contains a usage type.
