/// <summary>
/// Vertex shader stage.
/// </summary>
private void StageVertexShader(TVertexIn[] vertices, PrimitiveTopology primitiveTopology)
{
var verticesVsOut = new TVertex[vertices.Length];
for (var i = 0; i < vertices.Length; i++)
{
verticesVsOut[i] = Shader.VertexShader(vertices[i]);
}
StageVertexPostProcessing(verticesVsOut, primitiveTopology);
}
/// <summary>
/// Vertex post-processing stage.
/// </summary>
private void StageVertexPostProcessing(TVertex[] vertices, PrimitiveTopology primitiveTopology)
{
switch (primitiveTopology)
{
case PrimitiveTopology.PointList:
for (var i = 0; i < vertices.Length; i++)
{
VertexPostProcessingPoint(vertices[i]);
}
break;
case PrimitiveTopology.LineList:
for (var i = 0; i < vertices.Length; i += 2)
{
VertexPostProcessingLine(vertices[i], vertices[i + 1]);
}
break;
case PrimitiveTopology.LineStrip:
for (var i = 0; i < vertices.Length - 1; i++)
{
VertexPostProcessingLine(vertices[i], vertices[i + 1]);
}
break;
case PrimitiveTopology.TriangleList:
for (var i = 0; i < vertices.Length; i += 3)
{
VertexPostProcessingTriangle(vertices[i], vertices[i + 1], vertices[i + 2]);
}
break;
case PrimitiveTopology.TriangleStrip:
for (var i = 0; i < vertices.Length - 2; i++)
{
VertexPostProcessingTriangle(vertices[i], vertices[i + 1], vertices[i + 2]);
}
break;
default:
throw new ArgumentOutOfRangeException(nameof(primitiveTopology), primitiveTopology, null);
}
}
/// <inheritdoc />
public void Render(TVertexIn[] vertices, PrimitiveTopology primitiveTopology)
{
StageVertexShader(vertices, primitiveTopology);
}
