public void GenerateNodeCode(ShaderStringBuilder sb, GenerationMode generationMode)
{
var outputSlot = FindOutputSlot <MaterialSlot>(OutputSlotId);
bool isGeneratingSubgraph = owner.isSubGraph && (generationMode != GenerationMode.Preview);
if (generationMode == GenerationMode.Preview || !isGeneratingSubgraph)
{
sb.AppendLine(string.Format($"{outputSlot.concreteValueType.ToShaderString()} {GetVariableNameForSlot(OutputSlotId)};"));
var value = GetSlotValue(GetSlotIdForActiveSelection(), generationMode);
sb.AppendLine(string.Format($"{GetVariableNameForSlot(OutputSlotId)} = {value};"));
}
else
{
// Iterate all entries in the dropdown
for (int i = 0; i < dropdown.entries.Count; i++)
{
if (i == 0)
{
sb.AppendLine(string.Format($"{outputSlot.concreteValueType.ToShaderString()} {GetVariableNameForSlot(OutputSlotId)};"));
sb.AppendLine($"if ({m_Dropdown.value.referenceName} == {i})");
}
else
{
sb.AppendLine($"else if ({m_Dropdown.value.referenceName} == {i})");
}
{
sb.AppendLine("{");
sb.IncreaseIndent();
var value = GetSlotValue(GetSlotIdForPermutation(new KeyValuePair <ShaderDropdown, int>(dropdown, i)), generationMode);
sb.AppendLine(string.Format($"{GetVariableNameForSlot(OutputSlotId)} = {value};"));
sb.DecreaseIndent();
sb.AppendLine("}");
}
if (i == dropdown.entries.Count - 1)
{
sb.AppendLine($"else");
sb.AppendLine("{");
sb.IncreaseIndent();
var value = GetSlotValue(GetSlotIdForPermutation(new KeyValuePair <ShaderDropdown, int>(dropdown, 0)), generationMode);
sb.AppendLine(string.Format($"{GetVariableNameForSlot(OutputSlotId)} = {value};"));
sb.DecreaseIndent();
sb.AppendLine("}");
}
}
}
}
public static void GetKeywordPermutationDeclarations(ShaderStringBuilder sb, List <List <KeyValuePair <ShaderKeyword, int> > > permutations)
{
if (permutations.Count == 0)
{
return;
}
for (int p = 0; p < permutations.Count; p++)
{
// ShaderStringBuilder.Append doesnt apply indentation
sb.AppendIndentation();
// Append correct if
bool isLast = false;
if (p == 0)
{
sb.Append("#if ");
}
else if (p == permutations.Count - 1)
{
sb.Append("#else");
isLast = true;
}
else
{
sb.Append("#elif ");
}
// Last permutation is always #else
if (!isLast)
{
// Track whether && is required
bool appendAnd = false;
// Iterate all keywords that are part of the permutation
for (int i = 0; i < permutations[p].Count; i++)
{
// When previous keyword was inserted subsequent requires &&
string and = appendAnd ? " && " : string.Empty;
switch (permutations[p][i].Key.keywordType)
{
case KeywordType.Enum:
{
sb.Append($"{and}defined({permutations[p][i].Key.referenceName}_{permutations[p][i].Key.entries[permutations[p][i].Value].referenceName})");
appendAnd = true;
break;
}
case KeywordType.Boolean:
{
// HLSL does not support a !value predicate
if (permutations[p][i].Value != 0)
{
continue;
}
sb.Append($"{and}defined({permutations[p][i].Key.referenceName})");
appendAnd = true;
break;
}
default:
throw new ArgumentOutOfRangeException();
}
}
}
sb.AppendNewLine();
// Define the matching permutation keyword
sb.IncreaseIndent();
sb.AppendLine($"#define KEYWORD_PERMUTATION_{p}");
sb.DecreaseIndent();
}
// End statement
sb.AppendLine("#endif");
}
