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Refactor specular lighting to properly map specular as reflectance in BRDF

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Reference: https://google.github.io/filament/Filament.md.html

#1492
This commit is contained in:
Wojtek Figat
2025-09-30 15:43:55 +02:00
parent 02c5ad3fa4
commit 0848f1fa83
8 changed files with 65 additions and 21 deletions
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8
Source/Engine/Tools/MaterialGenerator/MaterialGenerator.Material.cpp
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@@ -106,7 +106,7 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
Value values[OutputsMax];
for (int32 i = 0; i < OutputsMax; i++)
{
const auto outputBox = node->GetBox(Output0BoxID + i);
const auto outputBox = node->TryGetBox(Output0BoxID + i);
if (outputBox && outputBox->HasConnection())
{
values[i] = writeLocal(VariantType::Float4, node);
@@ -119,7 +119,7 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
for (int32 i = 0; i < InputsMax; i++)
{
auto inputName = TEXT("Input") + StringUtils::ToString(i);
const auto inputBox = node->GetBox(Input0BoxID + i);
const auto inputBox = node->TryGetBox(Input0BoxID + i);
if (inputBox && inputBox->HasConnection())
{
auto inputValue = tryGetValue(inputBox, Value::Zero);
@@ -131,7 +131,7 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
for (int32 i = 0; i < OutputsMax; i++)
{
auto outputName = TEXT("Output") + StringUtils::ToString(i);
const auto outputBox = node->GetBox(Output0BoxID + i);
const auto outputBox = node->TryGetBox(Output0BoxID + i);
if (outputBox && outputBox->HasConnection())
{
code.Replace(*outputName, *values[i].Value, StringSearchCase::CaseSensitive);
@@ -146,7 +146,7 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
// Link output values to boxes
for (int32 i = 0; i < OutputsMax; i++)
{
const auto outputBox = node->GetBox(Output0BoxID + i);
const auto outputBox = node->TryGetBox(Output0BoxID + i);
if (outputBox && outputBox->HasConnection())
{
outputBox->Cache = values[i];