void TranslateMatrices(HlslStructure.ShaderStatement[] elements, int callDepth, ShaderExtension extension)
{
bool isInstancing = extension == ShaderExtension.Instancing;
List<int> skipFinalRemappingIndices = new List<int>();
int processingMul = 0, depth = 0, arg = 0;
int argStart = 0, argEnd = 0;
int remapArg = -1;
int remapIndex = 0;
MatrixMapping remapping = new MatrixMapping();
Stack<int> mulStart = new Stack<int>();
Stack<int> mulDepth = new Stack<int>();
Stack<int> mulArg = new Stack<int>();
Stack<int> mulArgStart = new Stack<int>();
Stack<int> mulArgEnd = new Stack<int>();
Stack<int> mulRemap = new Stack<int>();
Stack<int> mulRemapIdx = new Stack<int>();
Stack<MatrixMapping> mulRemapping = new Stack<MatrixMapping>();
for (int i = 0; i < elements.Length; i++)
{
string line = elements[i].Statement;
if (line == "mul")
{
processingMul++;
mulStart.Push(i);
mulDepth.Push(depth);
mulArg.Push(arg);
mulArgEnd.Push(argEnd);
mulArgStart.Push(argStart);
mulRemap.Push(remapArg);
mulRemapping.Push(remapping);
mulRemapIdx.Push(remapIndex);
depth = 0;
arg = 0;
argStart = 0;
argEnd = 0;
remapArg = -1;
remapIndex = 0;
remapping = new MatrixMapping();
}
MatrixMapping mapping;
if (processingMul > 0 && depth == 1 && matrixRemap.TryGetValue(line, out mapping) && (mapping.BaseName != null || !isInstancing))
{
remapArg = arg;
remapping = mapping;
remapIndex = i;
}
if (processingMul > 0 && line == "(")
{
if (depth == 0)
argStart = i;
depth++;
}
if (processingMul > 0 && depth == 1 && line == ",")
{
if (depth == 1)
argEnd = i;
arg++;
}
if (processingMul > 0 && line == ")")
{
depth--;
if (depth == 0)
{
string baseMatrix = remapping.Name;
if (isInstancing)
baseMatrix = remapping.BaseName;
string prefix = "";
int startPrefix = -1;
if (remapArg == 1)
startPrefix = argEnd;
if (remapArg == 0)
startPrefix = argStart;
if (remapIndex > startPrefix && startPrefix != -1)
{
for (int p = startPrefix + 1; p < remapIndex; p++)
prefix += elements[p].Statement + " ";
}
//right, see if the args need modifying.
if (remapArg == 1)
{
//a known remapping matrix was used.
var element = elements[remapIndex];
elements[remapIndex] = new HlslStructure.ShaderStatement(baseMatrix, element.Line);
element = elements[argStart];
elements[argStart] = new HlslStructure.ShaderStatement("(mul(", element.Line);
element = elements[argEnd];
elements[argEnd] = new HlslStructure.ShaderStatement("," + prefix + worldMatrixName + "),", element.Line);
if (!isInstancing)
skipFinalRemappingIndices.Add(remapIndex);
}
if (remapArg == 0) // transpose
{
//a known remapping matrix was used.
var element = elements[remapIndex];
elements[remapIndex] = new HlslStructure.ShaderStatement(baseMatrix, element.Line);
element = elements[argEnd];
elements[argEnd] = new HlslStructure.ShaderStatement(",mul(" + prefix + worldMatrixName + ",", element.Line);
element = elements[i];
elements[i] = new HlslStructure.ShaderStatement("))", element.Line);
if (!isInstancing)
skipFinalRemappingIndices.Add(remapIndex);
}
processingMul--;
mulStart.Pop();
depth = mulDepth.Pop();
arg = mulArg.Pop();
argEnd = mulArgEnd.Pop();
argStart = mulArgStart.Pop();
remapArg = mulRemap.Pop();
remapping = mulRemapping.Pop();
remapIndex = mulRemapIdx.Pop();
}
}
}
//find unremapped matrices
if (callDepth > 0)
{
for (int i = 0; i < elements.Length; i++)
{
//it is intended that this matrix reference is not modified.
if (!isInstancing && skipFinalRemappingIndices.Contains(i))
continue;
MatrixMapping mapping;
if (matrixRemap.TryGetValue(elements[i].Statement, out mapping))
elements[i] = new HlslStructure.ShaderStatement(mapping.RemapTo, elements[i].Line);
}
}
}
void TranslateMethodNames(HlslStructure.ShaderStatement[] elements, int callDepth, ShaderExtension extension)
{
for (int i = 0; i < elements.Length; i++)
{
string methodName = elements[i].Statement;
bool multArg;
if (methodNames.TryGetValue(methodName, out multArg))
{
BuildMethod(methodName, extension);
//find the method start
for (int n = i+1; n < elements.Length; n++)
{
if (elements[n] == "(")
{
string argAppend = multArg ? ", " : "";
//append the method signatures
if (callDepth == 0)
elements[n] = new HlslStructure.ShaderStatement("(" + this.methodSignatureAppend + argAppend, elements[n].Line);
else
elements[n] = new HlslStructure.ShaderStatement("(" + this.methodCallAppend + argAppend, elements[n].Line);
elements[i] = new HlslStructure.ShaderStatement(ToInternalMethodName(methodName,extension), elements[i].Line);
break;
}
}
}
}
}