static void AddParameter(JSON &json, CGparameter param)
{
const char * const parameterName = cgGetParameterName(param);
if (sVerbose)
{
puts(parameterName);
}
json.AddObject(parameterName);
const CGtype type = cgGetParameterType(param);
const CGtype baseType = cgGetParameterBaseType(param);
int numRows = cgGetParameterRows(param);
const int numColumns = cgGetParameterColumns(param);
if (CG_ARRAY == type)
{
const int totalArraySize = cgGetArrayTotalSize(param);
numRows *= totalArraySize;
}
json.AddString("type", cgGetTypeString(baseType));
if (1 < numRows)
{
json.AddValue("rows", numRows);
}
if (1 < numColumns)
{
json.AddValue("columns", numColumns);
}
const int maxNumElements = (numColumns * numRows);
int n;
if (CG_FLOAT == baseType)
{
float * const values = (float *)malloc(maxNumElements * sizeof(float));
const int numValues = cgGetParameterValuefr(param, maxNumElements, values);
if (numValues)
{
for (n = 0; n < numValues; n++)
{
if (values[n] != 0.0f)
{
break;
}
}
if (n < numValues)
{
json.AddArray("values", true);
json.BeginData(true);
for (n = 0; n < numValues; n++)
{
json.AddData(values[n]);
}
json.EndData();
json.CloseArray(true);
}
}
free(values);
}
else if (CG_INT == baseType)
{
int * const values = (int *)malloc(maxNumElements * sizeof(int));
const int numValues = cgGetParameterValueir(param, maxNumElements, values);
if (numValues)
{
for (n = 0; n < numValues; n++)
{
if (values[n])
{
break;
}
}
if (n < numValues)
{
json.AddArray("values", true);
json.BeginData(true);
for (n = 0; n < numValues; n++)
{
json.AddData(values[n]);
}
json.EndData();
json.CloseArray(true);
}
}
free(values);
}
else if (CG_BOOL == baseType)
{
int * const values = (int *)malloc(maxNumElements * sizeof(int));
const int numValues = cgGetParameterValueir(param, maxNumElements, values);
if (numValues)
{
for (n = 0; n < numValues; n++)
{
if (values[n])
{
break;
}
}
if (n < numValues)
{
json.AddArray("values", true);
json.BeginData(true);
for (n = 0; n < numValues; n++)
{
json.AddData(values[n]);
}
json.EndData();
json.CloseArray(true);
}
}
free(values);
}
json.CloseObject(); // parameter
}
void cgfxVaryingParameter::setupAttributes( cgfxRCPtr<cgfxVertexAttribute>& vertexAttributes, CGprogram program)
{
// Make sure our parameter name is acceptable is a Maya attribute name
MString attrName = fName;
int lastDot = attrName.rindex( '.');
if( lastDot >= 0)
attrName = attrName.substring( lastDot + 1, attrName.length() - 1);
MString semanticName = cgGetParameterSemantic( fParameter);
MString semantic(semanticName);
cgGetParameterSemantic( fParameter);
semantic.toUpperCase();
// Is this varying parameter packed or atomic?
CGtype type = cgGetNamedUserType( program, attrName.asChar());
if( type != CG_UNKNOWN_TYPE)
{
// It's packed: explode the inputs into the structure elements
CGcontext context = cgGetProgramContext( program);
CGparameter packing = cgCreateParameter( context, type);
fVertexStructure = new cgfxVaryingParameterStructure();
fVertexStructure->fLength = 0;
fVertexStructure->fSize = 0;
CGparameter element = cgGetFirstStructParameter( packing);
while( element)
{
MString elementName = cgGetParameterName( element);
int lastDot = elementName.rindex( '.');
if( lastDot >= 0)
elementName = elementName.substring( lastDot + 1, elementName.length() - 1);
cgfxRCPtr<cgfxVertexAttribute> attr = setupAttribute( elementName, semantic, element, vertexAttributes);
fVertexStructure->fElements[ fVertexStructure->fLength].fVertexAttribute = attr;
int size = cgGetParameterRows( element) * cgGetParameterColumns( element);
CGtype type = cgGetParameterBaseType( element);
if( type == CG_FLOAT) size *= sizeof( GLfloat);
else if( type == CG_INT) size *= sizeof( GLint);
fVertexStructure->fElements[ fVertexStructure->fLength].fSize = size;
fVertexStructure->fLength++;
fVertexStructure->fSize += size;
element = cgGetNextParameter( element);
}
cgDestroyParameter( packing);
}
else
{
// It's atomic - create a single, simple input
fVertexAttribute = setupAttribute( attrName, semantic, fParameter, vertexAttributes);
}
// Now pull apart the semantic string to work out where to bind
// this value in open GL (as the automagic binding through cgGL
// didn't work so well when this was written)
int radix = 1;
fGLIndex = 0;
unsigned int length = semantic.length();
const char* str = semantic.asChar();
// If sematic is NULL then stop here, bug 327649
if (length == 0) {
fGLType = glRegister::kUnknown;
return;
}
for(;;)
{
char c = str[ length - 1];
if( c < '0' || c > '9') break;
fGLIndex += radix * (c - '0');
radix *= 10;
--length;
}
if( semantic.length() != length)
semantic = semantic.substring( 0, length - 1);
// Determine the semantic and setup the gl binding type we should use
// to set this parameter. If there's a sensible default value, set that
// while we're here.
// Note there is no need to set the source type, this gets determined
// when the vertex attribute sources are analysed
if( semantic == "POSITION")
{
fGLType = glRegister::kPosition;
fVertexAttribute->fSourceName = "position";
}
else if( semantic == "NORMAL")
{
fGLType = glRegister::kNormal;
if( fVertexAttribute.isNull() == false )
fVertexAttribute->fSourceName = "normal";
}
else if( semantic == "TEXCOORD")
{
fGLType = glRegister::kTexCoord;
if( fVertexAttribute.isNull() == false )
{
if( attrName.toLowerCase() == "tangent")
fVertexAttribute->fSourceName = "tangent:map1";
else if( attrName.toLowerCase() == "binormal")
fVertexAttribute->fSourceName = "binormal:map1";
else
fVertexAttribute->fSourceName = "uv:map1";
}
}
else if( semantic == "TANGENT")
{
fGLType = glRegister::kTexCoord;
fGLIndex += 6; // TANGENT is TEXCOORD6
if( fVertexAttribute.isNull() == false )
fVertexAttribute->fSourceName = "tangent:map1";
}
else if( semantic == "BINORMAL")
{
fGLType = glRegister::kTexCoord;
fGLIndex += 7; // BINORMAL is TEXCOORD7
if( fVertexAttribute.isNull() == false )
fVertexAttribute->fSourceName = "binormal:map1";
}
else if( semantic == "COLOR")
{
fGLType = fGLIndex == 1 ? glRegister::kSecondaryColor : glRegister::kColor;
}
else if( semantic == "ATTR")
{
fGLType = glRegister::kVertexAttrib;
if( fVertexAttribute.isNull() == false )
{
fVertexAttribute->fSourceName = semanticName;
}
}
else if( semantic == "PSIZE")
{
fGLType = glRegister::kVertexAttrib;
fGLIndex = 6;
}
else
{
fGLType = glRegister::kUnknown;
}
}