/// <summary>
/// Resolve input paramteter of this function
/// </summary>
/// <param name="semantic"> The desired parameter semantic </param>
/// <param name="index"> The index of the desired parameter </param>
/// <param name="content"> The Content of the parameter </param>
/// <param name="type"> The type of the desired parameter </param>
/// <returns> paramter instance in case of that resolve operation succeed </returns>
/// <remarks>
/// Pass -1 as index paraemter to craete a new pareamter with the desired semantic and type
/// </remarks>
public Parameter ResolveInputParameter(Parameter.SemanticType semantic, int index,
Parameter.ContentType content,
Graphics.GpuProgramParameters.GpuConstantType type)
{
Parameter param = null;
//Check if desried parameter already defined
param = Function.GetParameterByContent(this.inputParameters, content, type);
if (param != null)
{
return(param);
}
//Case we have to create new parameter
if (index == -1)
{
index = 0;
//find the next available index of the target semantic
for (int it = 0; it < this.inputParameters.Count; it++)
{
if (this.inputParameters[it].Semantic == semantic)
{
index++;
}
}
}
else
{
//check if desried parameter already defined
param = Function.GetParameterBySemantic(this.inputParameters, semantic, index);
if (param != null & param.Content == content)
{
if (param.Type == type)
{
return(param);
}
else
{
throw new AxiomException("Cannot resolve parameter - semantic: " + semantic.ToString() +
" - index: " + index.ToString() + " due to type mimatch. Function <" +
Name + ">");
}
}
}
//No parameter found -> create one
switch (semantic)
{
case Parameter.SemanticType.Unknown:
break;
case Parameter.SemanticType.Position:
param = ParameterFactory.CreateInPosition(index);
break;
case Parameter.SemanticType.BlendWeights:
param = ParameterFactory.CreateInWeights(index);
break;
case Parameter.SemanticType.BlendIndicies:
param = ParameterFactory.CreateInIndices(index);
break;
case Parameter.SemanticType.Normal:
param = ParameterFactory.CreateInNormal(index);
break;
case Parameter.SemanticType.Color:
param = ParameterFactory.CreateInColor(index);
break;
case Parameter.SemanticType.TextureCoordinates:
param = ParameterFactory.CreateInTexcoord(type, index, content);
break;
case Parameter.SemanticType.Binormal:
param = ParameterFactory.CreateInBiNormal(index);
break;
case Parameter.SemanticType.Tangent:
param = ParameterFactory.CreateInTangent(index);
break;
}
if (param != null)
{
AddInputParameter(param);
}
return(param);
}