/// <summary>
/// Resolve output 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 ResolveOutputParameter(Parameter.SemanticType semantic, int index,
Parameter.ContentType content,
Graphics.GpuProgramParameters.GpuConstantType type)
{
Parameter param = null;
//Check if desired parameter already defined
param = Function.GetParameterByContent(this.outputParameters, content, type);
if (param != null)
{
return(param);
}
//case we have to create new parameter.
if (index == -1)
{
index = 0;
//find the next availabe index of the target semantic
for (int it = 0; it < this.outputParameters.Count; it++)
{
if (this.outputParameters[it].Semantic == semantic)
{
index++;
}
}
}
else
{
//check if desired parameter already defined
param = GetParameterBySemantic(this.outputParameters, 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 new one
switch (semantic)
{
case Parameter.SemanticType.Unknown:
break;
case Parameter.SemanticType.Position:
param = ParameterFactory.CreateOutPosition(index);
break;
case Parameter.SemanticType.BlendWeights:
case Parameter.SemanticType.BlendIndicies:
throw new AxiomException("Can not resolve parameter - semantic: " + semantic.ToString() +
" - index: " + index.ToString() +
" since support init is not implemented yet. Function <" + Name + ">");
case Parameter.SemanticType.Normal:
param = ParameterFactory.CreateOutNormal(index);
break;
case Parameter.SemanticType.Color:
param = ParameterFactory.CreateOutColor(index);
break;
case Parameter.SemanticType.TextureCoordinates:
param = ParameterFactory.CreateOutTexcoord(type, index, content);
break;
case Parameter.SemanticType.Binormal:
param = ParameterFactory.CreateOutBiNormal(index);
break;
case Parameter.SemanticType.Tangent:
param = ParameterFactory.CreateOutTangent(index);
break;
default:
break;
}
if (param != null)
{
AddOutputParameter(param);
}
return(param);
}