/// <summary>
/// Get the output from the vertex shader.
/// </summary>
/// <param name="primitiveID"></param>
/// <param name="instanceID"></param>
private void GetVertexShaderOutput(int primitiveID, int instanceID)
{
if (DrawCall?.cmd?.Count == 0)
{
return;
}
// load patch data from vertex shader
var patch = DrawCall.GetPatch(primitiveID);
DebugGetError(new StackTrace(true));
gl_PatchVerticesIn = patch.Length;
gl_PrimitiveID = primitiveID;
for (int i = 0; i < gl_PatchVerticesIn; i++)
{
// compute vertex shader data
VertShader.Execute(Convert.ToInt32(patch.GetValue(i)), instanceID);
// set input data for the vertex
gl_in[i].gl_Position = VertShader.GetOutputVarying <vec4>("gl_Position");
gl_in[i].gl_PointSize = VertShader.GetOutputVarying <float>("gl_PointSize");
var clipDistance = VertShader.GetOutputVarying <float[]>("gl_ClipDistance");
for (int j = 0; j < clipDistance.Length; j++)
{
gl_in[i].gl_ClipDistance[j] = clipDistance[j];
}
}
}
/// <summary>
/// Get the vertex shader output for the
/// respective primitive ID and instance.
/// </summary>
/// <param name="primitiveID"></param>
/// <param name="instanceID"></param>
private void GetVertexShaderOutput(int primitiveID, int instanceID)
{
if (DrawCall?.cmd?.Count == 0)
{
return;
}
var vertexShader = VertexShader;
// set shader input
gl_PrimitiveIDIn = primitiveID;
// load patch data from vertex shader
var patch = DrawCall.GetPatch(primitiveID);
DebugGetError(new StackTrace(true));
gl_in = __InOut.Create(patch.Length);
for (int i = 0; i < patch.Length; i++)
{
// compute vertex shader output
var vertexID = Convert.ToInt32(patch.GetValue(i));
vertexShader.Execute(vertexID, instanceID);
// set geometry shader built in input varyings
gl_in[i].gl_Position = vertexShader.GetOutputVarying <vec4>("gl_Position");
gl_in[i].gl_PointSize = vertexShader.GetOutputVarying <float>("gl_PointSize");
var clipDistance = vertexShader.GetOutputVarying <float[]>("gl_ClipDistance");
for (int j = 0; j < clipDistance.Length; j++)
{
gl_in[i].gl_ClipDistance[j] = clipDistance[j];
}
// set geometry shader user input varyings
ProcessFields(this, ProcessInField, new[] { typeof(__in) }, i);
}
}
