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Fix Height Layer Blend material node codegen when alpha is constant

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#1705
This commit is contained in:
Wojtek Figat
2023-10-14 18:03:51 +02:00
parent e51aab0c56
commit 2f3929efe0
2 changed files with 3 additions and 2 deletions
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3
Source/Engine/Tools/MaterialGenerator/MaterialGenerator.Layers.cpp
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@@ -147,7 +147,7 @@ void MaterialGenerator::ProcessGroupLayers(Box* box, Node* node, Value& value)
case 8:
{
const Value defaultValue = MaterialValue::InitForZero(VariantType::Void);
const Value alpha = tryGetValue(node->GetBox(2), 0, Value::Zero);
Value alpha = tryGetValue(node->GetBox(2), 0, Value::Zero).AsFloat();
if (alpha.IsZero())
{
// Bottom-only
@@ -178,6 +178,7 @@ void MaterialGenerator::ProcessGroupLayers(Box* box, Node* node, Value& value)
auto topHeightScaled = writeLocal(VariantType::Float, String::Format(TEXT("{0} * {1}"), topHeight.Value, alpha.Value), node);
auto heightStart = writeLocal(VariantType::Float, String::Format(TEXT("max({0}, {1}) - 0.05"), bottomHeightScaled.Value, topHeightScaled.Value), node);
auto bottomLevel = writeLocal(VariantType::Float, String::Format(TEXT("max({0} - {1}, 0.0001)"), topHeightScaled.Value, heightStart.Value), node);
alpha = writeLocal(VariantType::Float, alpha.Value, node);
_writer.Write(TEXT("\t{0} = {1} / (max({2} - {3}, 0) + {4});\n"), alpha.Value, bottomLevel.Value, bottomHeightScaled.Value, heightStart.Value, bottomLevel.Value);
}
#define EAT_BOX(type) writeBlending(MaterialGraphBoxes::type, value, bottom, top, alpha)