/// <summary>
/// Creates a new instance of <see cref="VertexElement"/>.
/// </summary>
/// <param name="semantic">The element's shader semantic.</param>
/// <param name="semanticIndex">The element's shader semantic index</param>
/// <param name="format">The element's format.</param>
/// <param name="offset">The element's offset from the start of the vertex data.</param>
public VertexElement(VertexSemantic semantic, int semanticIndex, VertexFormat format, int offset)
{
Offset = offset;
SemanticName = semantic;
SemanticIndex = semanticIndex;
Format = format;
}
private int IncrementSemanticIndex(VertexSemantic semantic)
{
int arrayIndex = (int)semantic;
int arrayValue = _semanticIndexCount[arrayIndex];
_semanticIndexCount[arrayIndex] = arrayValue + 1;
return(arrayValue);
}
private static VertexElementUsage Convert(VertexSemantic semantic)
{
switch (semantic)
{
case VertexSemantic.Color: return(VertexElementUsage.Color);
case VertexSemantic.Texture: return(VertexElementUsage.TextureCoordinate);
case VertexSemantic.Position: return(VertexElementUsage.Position);
default:
throw new Exception($"Unsupported semantic: {semantic}");
}
}
/// <summary>
/// Deserializes the object and populates it from the input.
/// </summary>
/// <param name="input">Savable input</param>
public void Read(ISavableReader input)
{
_vertexStride = input.ReadInt();
int count = input.ReadInt();
_elements = new VertexElement[count];
for (int i = 0; i < count; i++)
{
VertexSemantic semantic = input.ReadEnum <VertexSemantic>();
int semanticIndex = input.ReadInt();
VertexFormat format = input.ReadEnum <VertexFormat>();
int offset = input.ReadInt();
_elements[i] = new VertexElement(semantic, semanticIndex, format, offset);
}
GetHashCode();
}
internal static String ToD3DVertexSemantic(VertexSemantic semantic)
{
switch (semantic)
{
case VertexSemantic.Position:
return("POSITION");
case VertexSemantic.Normal:
return("NORMAL");
case VertexSemantic.Color:
return("COLOR");
case VertexSemantic.TextureCoordinate:
return("TEXCOORD");
case VertexSemantic.Binormal:
return("BINORMAL");
case VertexSemantic.Tangent:
return("TANGENT");
case VertexSemantic.BlendIndices:
return("BLENDINDICES");
case VertexSemantic.BlendWeight:
return("BLENDWEIGHT");
case VertexSemantic.Depth:
return("DEPTH");
case VertexSemantic.Fog:
return("FOG");
case VertexSemantic.PointSize:
return("PSIZE");
default:
throw new ArgumentException("Invalid vertex semantic");
}
}
public VertexElementAttribute(VertexElementType elementType, VertexSemantic semantic, int usageIndex = 0)
{
VertexSchema = new VertexSchema(elementType, semantic, usageIndex);
}
public VertexSchema(VertexElementType elementType, VertexSemantic semantic, int usageIndex = 0)
{
ElementType = elementType;
Semantic = semantic;
UsageIndex = usageIndex;
}
